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OT - Fokker pair No.2

Posted By: Sandbagger

OT - Fokker pair No.2 - 04/03/19 03:02 PM

Hi all,
The first of the Fokker D.VII pair is completed.
So now I'm starting the second of the models, the 'skeletal' model.
This will be a full view model with 3D printed parts from 'Shapeways'.

The donor engine is from the 'Wingnut Wings' Fokker D.VII (OAW) built with the following replacement 3D printed components:
Created by Bob Monroe ('Flugzeugwerke') and available from ‘Shapeways’.
Mercedes D.III Oil Pump,
Mercedes D.IIIa Cylinders (hollow),
Mercedes D.IIIa Crankcase,
German Aircraft Magneto,
Mercedes Cylinder clamps,
Gun synchro mechanism,

The aircraft structure will be the 3D printed Fokker D.VII structure.
Created by Richard Andrews ('Aviattic') and available from ‘Shapeways’.

Shapeways

There will be other after market parts used.

I thought I'd start with the engine, which had to modify slightly as the internal mountings in the 3D sump and block are too small to accept the kit supplied propeller shaft.
Instead I've made one from brass micro-tube to fit not only the 3D engine but also the 'Proper Plane' Heine propeller.

Mike

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Posted By: Stache

Re: OT - Fokker pair No.2 - 04/03/19 05:44 PM

Hi Mike, The linked images are not showing for me.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/03/19 07:44 PM

I forgot my site host servers are undergoing maintenance (yesterday and today) - hopefully my images will show up by tomorrow,

Mike
Posted By: jakethescot1

Re: OT - Fokker pair No.2 - 04/03/19 09:59 PM

Those are beautiful models. Especially that HANSA-BRANDENBURG W.29. Thanks for the link. Enjoyed them all.
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/04/19 01:16 PM

Ah, now the links are working!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/04/19 03:27 PM

Error 503 on the host server - apparently the ISS pool had to be refreshed 

OK now,



Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/04/19 07:34 PM

Hi all,
A few more engine bits prepared.
Spark plugs made from micro-tube and 'RB Motion' aluminium nuts.
'Taurus' manifold locking rings - cut and sanded to fit the 3D printed engine,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/05/19 04:19 PM

Hi all,
A couple of magnetos each made of four separate 3D printed parts.
The ignition leads support tube made from micro-tube.
The magneto drive modified to fit the 3D engine with a brass rod for the magneto drives.
Also the cylinders are mounted onto the engine block,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/06/19 05:27 PM

Hi all,
Starting to assemble the engine accessories now.
So far the spark plugs, ignition lead support tubes, camshaft, air pump, coolant drain tap and cylinder base bridging clamps.
Still plenty more to do,

Mike


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Posted By: Fullofit

Re: OT - Fokker pair No.2 - 04/06/19 06:52 PM

Looking good Mike. Can you explain the difference between resin and 3D printed parts? I assume you went with 3D printed because they’re better. Are they more detailed? Or is it because they could be printed on demand and thus more readily available? Just wonderin’.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/07/19 08:19 AM

Normally a kit will be created using styrene ('plastic'), which can vary dependent on who makes the kit. The two halves of the sprue mold are machined from steel and styrene under pressure is pumped into the mold, which when separated ejects the parts sprue.
Some styrene is harder and therefore can be more defined in detail. Also these kits normally have location pegs and holes, so alignment of parts is not a problem. Parts are cemented using styrene cement, which melts and welds surfaces together.
Resin kits are made either as production runs or as short runs and, like sand casting, use master patterns to create the molds (similar to vacuum molded kits) in which the resin is poured. Those companies that retail resin as standard, such as HPH Models, are usually of better quality than those from short runs, which can have more problems, such as warping, small air blow holes and mis-molding (short shot). I have some resin parts which are obviously created in a small one man workshop. Some resin kits have no locating pegs or holes so can prove tricky to align parts and parts need to be cemented using CA adhesive, which bonds surfaces together, as styrene cement has no effect on resin.
The new comer is 3D printing, which although it has come a long way, still has its limitations. Various materials are used but for the parts I'm using, acrylic is the base material.
Expense is one disadvantage and small parts can be brittle (dependent on the material used) and even fine printing still leaves 'layer lines' on the surfaces.
However, printing from CAD type design software can produce small and detailed parts. For example look my earlier shot of the 3D printed engine block compared to the kit supplied part.

As the exposed structure for this model is 3D printed, I thought I'd try the 3D printed engine parts available as well.
So far I'm quite impressed with the level of detail although the surface 'layer lines' are evident on close inspection. They can be sand or scrapped away, but this is not really a practical option when working with small complex parts,

Mike
Posted By: Fullofit

Re: OT - Fokker pair No.2 - 04/07/19 01:00 PM

Mike, thanks for this thorough explanation. Imagine one day when we all will be able to 3D print parts for our models right at home. I suppose one day they’ll come up with a way to eliminate the layer lines. Probably increase the resolution to a level that is indiscernible to the human eye. Technology!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/07/19 04:32 PM

Hi all,
The engine has progressed a bit more now with the addition:
The conical valve springs
Crankcase breather pipe
Magneto drive assembly with two 3D printed magnetos
Two air pump to crankcase pipes
Decompression valve.

Still have to add ignition leads, intake manifold with locking rings, water pump, coolant pipes, oil filler pipes, sump oil sight glass.
There's also a couple of other pipes plus engine controls.

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/08/19 01:10 PM

Hi all,
The 3D printed parts are detailed but as can be seen from the shot below, some are very small.
This is a pair of machine gun synchronization mechanisms, each made up of four separate parts.
The biggest problem is separating them from the base block without damaging them!!

Mike


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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/08/19 01:21 PM

The engine looks fantastic Mike! Keep us posted on what tools you used to separate the 3D printed matter. If the material is dense in nature it could be problematic. Knife or saw!!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/08/19 06:10 PM

Trouble is the acrylic material used tends to be brittle so is very difficult to remove without damaging it,

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/10/19 08:04 PM

Hi all,
The end is in sight for this engine build.
I've added the decals, ignition leads, gun synchronization mechanism, oil sight glass, generator and drive, cylinder fuel primers, water pump, intake manifold with locking rings, crankcase breather pipe and additional pipes.
All that's left is to add the engine mounted throttle and spark advance (ignition timing) controls - the remainder of the control runs can't be added until the engine is fitted into the fuselage (with the cockpit),

Mike


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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/11/19 02:33 PM

Mike

I guess you were able to cut the 3D printed parts without damaging them. The engine looks really impressive.

What kind of tool did you use to separate the 3D parts from their base?
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/12/19 08:32 AM

Hi Rob,
Yeah I used a fine modelling saw to cut away most of the base block then carefully sanded the rest off.
Bob Monroe, who created the parts, suggested a saw from 'RB Productions and fixing the base block to something larger so it was easier to hold whilst cutting it away, but I'd already done it by then.
I have that saw coming though, for future use,

Mike'
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/12/19 04:32 PM

Originally Posted by Sandbagger
Hi Rob,
Yeah I used a fine modelling saw to cut away most of the base block then carefully sanded the rest off.
Bob Monroe, who created the parts, suggested a saw from 'RB Productions and fixing the base block to something larger so it was easier to hold whilst cutting it away, but I'd already done it by then.
I have that saw coming though, for future use,

Mike'


Would that saw have been produced through a photo etch process. I understand that is a common approach for very thin craft saw blades.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/12/19 05:40 PM

Hi Rob,
Yes - Radu Briznan at 'RB Productions' makes most of his tools by photo-etch.

I've added the control linkage to the top of the twin carburettors, which consist two levers, connecting rod and cable pulley.
Also the connected levers on the top of the attached 'speed controllers;.
I also created the frame mounted throttle bell-crank and the two cross bars on the forward fuselage frames, which are missing from the kit parts,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/13/19 01:39 PM

Hi all,
The final on-engine control linkage has been added, which is the spark advance (ignition timing) for bottom magnetos.
For now the engine will be put to one side so I can make a start on the cockpit,

Mike

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Posted By: Fullofit

Re: OT - Fokker pair No.2 - 04/13/19 02:45 PM

Mike, for a minute I thought the top picture was of your model! skyisfalling
That is a fine job. Can’t wait to see the cockpit build. I bet you’ll be adding glass to the dials and painting the needle tips with the fluorescent paint.
salute
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/13/19 09:04 PM

Hi all,
The kit supplied fuselage side frames married to the 3D printed fuselage.
This required cutting both, as both have a pilots seat frame and only one can be used of course.
As the join between the two could be a weak area, I chose to fit them together using brass micro-tube.
This gives more rigidity to the join of the fuselage and allows the fitting of the pilots seat frame from the kit (part A26),

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/14/19 11:47 AM

Just marvelous engine detail Mike. I for one, really appreciate all the construction notes. It's like taking a model building course. So...when does the video come out!! biggrin
Posted By: MFair

Re: OT - Fokker pair No.2 - 04/15/19 03:42 PM

Mike, WOW! Don't know what else to say.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/15/19 09:06 PM

Hi all,
Well time to start the fuselage build with controls, pipework etc,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/16/19 08:55 PM

Hi all,
Cockpit floor with controls and seat done,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/17/19 01:43 AM

Interesting to see a lozenge pattern used behind the pilot seat! I wonder why they did that.

Model looks really nice and I am anxiously awaiting it's completion.

Best Regards
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/18/19 05:02 PM

Hi all,
I've started on the cockpit pipework.
The pipe connections under the fuel tank.
Behind the instrument panel is the fuel valve manifold (made of micro-tube) connected to the pilot's four selectors. Two pipes out are for connecting the supply from the main and auxiliary fuel tanks.
From the bottom of the manifold will be the two supply pipes to the engines duel carburetor.
Electrical cables added to the rear faces of the starter magneto and ignition switch.

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/18/19 09:02 PM

Hi all,
Now things start to get complicated!!


Mike

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Posted By: MFair

Re: OT - Fokker pair No.2 - 04/18/19 10:43 PM

Mike, I would say it got complicated a while back! Great model.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/19/19 01:41 PM

Hi all,
The pilot's seat and support frame now fitted,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/19/19 06:50 PM

Hi all,
The pilot's hand operated fuel pressure pump pipe is done.
Also the rear gun support frame and the instrument panel are fitted,

Mike

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Posted By: Fullofit

Re: OT - Fokker pair No.2 - 04/19/19 07:33 PM

This is more detailed than the real thing! I just keep on marvelling every time you post new photographs. Stunning work Mike.
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/19/19 10:14 PM

Mike I am loving this!! It is getting very crowded in that frame and I bet quite challenging to connect all the lines and cables in such confined space.
Amazing patience you have Sir!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/20/19 04:22 PM

Hi all,
A few more things added:
Fuel lines from the underside of the fuel tank to the fuel gallery behind the instrument panel.
Grease line from the pilot's 'screw down' pump to the engine mounted water pump.
Fuel drain line from the underside of the fuel tank to outside of the fuselage bottom.
Oil line from the oil tank (in the fuel tank) to the engine driven oil pump.

Now it's onto the wiring up the magnetos and adding the throttle and spark advance (ignition timing) controls,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/21/19 04:09 PM

Mike, just what tools are you using to feed those lines inside the frame. I know you can't get your fingers in there.
Do you have the frame held in a clamp and then use tweezers in both hands?

Best Regards
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/21/19 04:31 PM

Hi Rob,
Just two tweezers as the frame is way to fragile to clamp in any way,

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/21/19 04:34 PM

Hi all,
Tachometer drive added from gun synchronization mechanism.
The two carburetor fuel feed pipes from the gallery behind the instrument panel,
The two machine gun trigger cables from the control column to the gun synchronization mechanism,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/22/19 12:47 PM

Hi all,
Leads fitted from the magneto starter behind the instrument panel to both engine driven magnetos,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/22/19 02:30 PM

Mike what are you using for the electrical leads and did you have to paint them?
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/22/19 05:01 PM

Hi Rob,
The leads are made from 'T-Force' XPS Match Sinking 0.148 mm line (Trabucco),

Mike
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/22/19 05:10 PM

Originally Posted by Sandbagger
Hi Rob,
The leads are made from 'T-Force' XPS Match Sinking 0.148 mm line (Trabucco),

Mike

Ha Ha, so you must be a fly fisherman also!!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/22/19 05:55 PM

Hi all,
'Spark Advance' control (Ignition Timing) fitted from cockpit lever to engine magnetos linkage rod.
Made from 0.3 mm brass tube, 0.1 mm Nickel-Silver rod and scratch link.

Mike

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Posted By: MFair

Re: OT - Fokker pair No.2 - 04/22/19 06:52 PM

OK,I get it now, you have a disassembled Fokker in your back yard and taking pictures as you get her back together! Fantastic work Mike.
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/22/19 07:29 PM

MFair, your killing me!! rofl

I can see why you might think that! It's an amazing piece of work isn't it!
Posted By: MFair

Re: OT - Fokker pair No.2 - 04/22/19 08:53 PM

Originally Posted by Robert_Wiggins
MFair, your killing me!! rofl

I can see why you might think that! It's an amazing piece of work isn't it!


Robert, as I am working on the Pfalz D.IIIa I ask myself all the time, “how does he do it?!” Yes Sir, it is amazing.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/23/19 05:09 PM

Hi all,
Throttle control run added from pilot's throttle lever to the linkage on the dual carburettors.
Scratch made from 0.1 mm Nickel-Silver rod and 0.3 mm brass tube with the pivot lever created from 'spare' photo-etch,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/23/19 07:31 PM

Hi all,
Control cable for the hand operated throttle added.
Lead wire 0.2 mm diameter, from hand throttle on the control column, down and under the floor, up side frames and across the throttle quadrant.
Then down the other side, under the floor and back up to the hand throttle.

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/24/19 04:20 AM

Mike is that lead wire spot glued in several locations to the frame and what type of glue did you have to use with it?
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/24/19 01:45 PM

Yes it is - CA adhesive as normal styrene cement won't touch anything other than the kits parts.
CA for lead or copper wire, acrylic 3D printed parts, brass or Nickel-Silver micro-tube.

Mike
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/24/19 04:09 PM

Originally Posted by Sandbagger
Yes it is - CA adhesive as normal styrene cement won't touch anything other than the kits parts.
CA for lead or copper wire, acrylic 3D printed parts, brass or Nickel-Silver micro-tube.

Mike


Thanks Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/24/19 05:58 PM

Hi all,
Generator lead and seat connector fitted.
Generators were not standard fit, but were installed to some aircraft to power heated flying suits later in WW1 and if carried, wireless transmitters.
Made from 0.4 mm diameter Nickel-Silver micro-tube and 0.148 mm diameter match line.


Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/24/19 07:19 PM

Much more to do?
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/24/19 08:27 PM

Hi Rob,
The cockpit and engine are more or less done.
I'll need to add the synchronization drives from the mechanism to the guns but only when I get to fit them.
Now I'm starting on the radiator and coolant pipes then ALL I have left is to completely rig the fuselage, paint and rig the wings, scratch make the undercarriage fairing and axle assembly then build it all including rudder, fin, tail plane and elevator then rig all of the flight controls.
So not much eek
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/26/19 01:10 PM

Hi all,
Radiator with photo-etch front and rear cooling core and scratch made pilot operated flap (to control engine cooling),

Mike


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Posted By: Shredward

Re: OT - Fokker pair No.2 - 04/26/19 02:01 PM

I'm gettting a chubby just looking at this stuff.
Cheers,
shredward
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/26/19 11:18 PM

The Radiator is beautifully weather with a nice patina
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/27/19 09:35 AM

Trust me Ted - it's giving me a hard time as well yep
Posted By: Fullofit

Re: OT - Fokker pair No.2 - 04/27/19 11:37 AM

Originally Posted by Sandbagger
Trust me Ted - it's giving me a hard time as well yep

It certainly has been a LONG journey to erect this replica.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/27/19 12:54 PM

Hi all,
Radiator flap control now fitted.
Made from micro-tube (0.4 mm and 0.1 mm diameter), photo-etch pulley and 0.125 mm copper wire for the loop handle,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/27/19 01:36 PM

Mike I have to ask, what are you using for reference material regarding placement of all the components. It almost seems that you have a copy of the blue prints!

Knowing where to attach/place all those parts boggles my mind!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/27/19 09:54 PM

Hi Rob,
I use the internet and various publications, although some are 'best guess' as there's not a lot of text or illustrations on these controls:

Osprey Aircraft of the Aces - Fokker D.VII aces Part 1-2 (Norman Franks/Greg VanWyngarden).
Albatros Productions - Windsock - Data file No.9 - Fokker D.VII (P.M. Grosz).
Albatros Productions - Fokker D.VII Anthology 1, 2 and 3 (Ray Rimell).
Kagero Publishing - Fokker D.VII The Lethal Weapon (Tomasz J. Kowalski and Marek Rys).
Wingnut Wings - Instruction manual (Kit No.32027).
Windsock Modelling Special No.3 - Building the Fokker D.VII (Ray Rimell).
Various online resources (e.g. Wikipedia and the Aerodrome forum).
Albatros D.III - Osprey Publishing (James F. Miller).

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/27/19 10:00 PM

Hi all,
Radiator side stays fitted,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/29/19 06:59 PM

Hi all,
The front end gas been weathered up a bit to keep it aligned with the associated Fokker D.VII model.
It's ready now for cross brace rigging and the fitting of the twp machine guns with their synchronization drive cables,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/29/19 07:15 PM

Mike, you had me hanging on the edge of my seat over the last few days with no updates from you on the project. I was afraid you had gone on vacation!! biggrin
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/29/19 10:02 PM

Heh - no it's just that rigging is very time consuming and as I'm using 0.08 mm line through 0.4 mm tube, I have to take breaks to rest the old eyes dizzy

Mike
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 04/29/19 10:25 PM

He He! I just couldn't resist chiding you!
It's an awesome piece of work Mike.

I'm already thinking about how you will display it to take advantage of all the detailed work you have put into it. I suspect it will be a very large dio format with two aircraft in it and I suspect it will be a challenge to avoid crowding..
I'm thinking more along the lines of a rectangular long display so that the fully finished model doesn't obstruct the view of the undinished one. You have a knack for dioramas so I know it will look great!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 04/30/19 09:06 AM

Hi Rob,
Yeah that's about it - keep it simple and uncluttered,

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/01/19 07:25 PM

Hi all,
Rigging has started now.
Difficult to make out some of the rigging as I had to tie back the flight control lines as they were getting in the way.

So far:
Double bracing across the top of the fuel tank.
Double bracing across the underside of the cockpit floor (2 sets).
Double bracing across the frame bays adjacent to the pilot's seat.
Double bracing across the rear of the pilot's seat support frame.
Double bracing across each vertical fuselage frame.

Done with 0.08 mm Mono-filament, 0.4 mm Nickel-Silver tube and 1:48th scale turnbuckles ('Gaspatch').
The same needs to done on each of the frame bays on each side of the fuselage as well as those under and on top of the fuselage.

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/01/19 07:32 PM

YIKES!!!

Mike that is a veritable spider's web. What an undertaking!! You get max points for patience and persistence!

It's really looking spiffy mate! That should win best of show hands down!!


Best Regards
Posted By: carrick58

Re: OT - Fokker pair No.2 - 05/01/19 09:45 PM

Un believable, Great work.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/02/19 04:33 PM

Hi all,
The top fuselage frames are cross braced.
Onto the sides now, then the make and fit the top decking panel and finally cross brace the bottom fuselage frames,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/03/19 11:20 PM

Hi all,
The fuselage side frame bays are now cross braced.
Now to make and fit the top decking panel and finally cross brace the bottom fuselage frames,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/04/19 02:22 PM

Hi all,
The fuselage rear decking panel fitted.
Now to cross brace the bottom fuselage frames, then it's onto the tail skid assembly,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/07/19 12:52 PM

Hi all,
The fuselage bottom cross bracing is done, which completes the fuselage bracing.
Also the tail skis has been fitted, with 0.125 mm copper wire suspension springs and 0.2 mm lead wire retention cable.

Now it's onto making the cockpit surround padding and fit the two modified 'Gaspatch' machine guns with their synchronization cables,


Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/08/19 08:09 PM

Hi all,
I realized that the fuselage rear decking panel was incorrect.
I made it such that the front edge butted up against the rear of the pilot's seat support frame.
In fact the decking seems to have passed over the seat frame, forming the rear cockpit surround, then onto the top of the cockpit side frames.
After several tries and five broken bracing wires, I think it's just about there now.

Now onto making the padded rim to fit around the cockpit rear decking and after that, the machine guns,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/08/19 08:31 PM

Mike that must have been one of those claasi, 'OH SH_T" MOMENTS FOR SURE!
Having to redo all those finicky bracing wires!!
I think you owe youself a dram of fine scotch and a break!

The model is looking great mate!
Posted By: Sailor_Steve

Re: OT - Fokker pair No.2 - 05/08/19 10:38 PM

Originally Posted by Robert_Wiggins
Mike that is a veritable spider's web.

I build a lot of models, mostly in 1/72. You don't get the kind of detail seen here when working in that small a scale, but you can accomplish a lot. I once had someone comment on the rigging on one of my WW1 models, and was asked how I kept track it all. I replied that it wasn't just hit or miss - every single cable has a place to be and a purpose for being there. I've found that as you start complex rigging it actually becomes a lot simpler when you realize that you're running each cable from and to a specific point. It all starts to make sense, and by the time you're done you can look at it and where others might see a mess, you see a tremendous pattern and logic to it all.

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It's really looking spiffy mate! That should win best of show hands down!!

I have to agree. It's a stunner.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/10/19 06:21 PM

Hi all,
Both machine guns are now fitted along with their synchronization flexible drives.
These drives are connected between the bottom of the gun breech blocks and the gun synchronization mechanism, fitted to the rear of the engine cam shaft,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/13/19 04:56 PM

Hi all,
I've added the padding rim around the fuselage decking panel and onto the top of the cockpit side frames.
This was done using 2.0 mm diameter plastic tube which was sanded to form a grip for painting.
Then it was slit along one side and located over the decking and secured in position with thin CA adhesive.
Finally it was primed, painted 'Humbrol' leather (62) and 'Tamiya' Hull Red (XF9), sealed then given a clay wash and finally sealed with 'Alclad' Light Sheen (ALC-311).


Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/13/19 08:04 PM

Hi all,
Tail unit assembled from the 3D printed parts.
Very fragile once separated from the support frame, so should prove interesting.
The elevator was missing the inboard trailing edge profile, presumably missed during printing process.
Therefore I had to make the profiles using 0.8 mm brass tube.

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/13/19 08:32 PM

Mike

Do you have plans to separate the tail and rudder flaps and apply hinges? That would be a real challenge due to those fragile parts.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/14/19 07:55 AM

Hi Rob,
No I've fixed it all in position as it's too weak to be movable.
I'll make dummy hinges etc though, just to add a touch of realism,

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/16/19 04:15 PM

Hi all,
Well the fuselage is completed, apart from fitting the engine exhaust and the propeller.
The Rudder and Elevator control runs have been connected with the turnbuckles under the pilot's seat.
Also the tail plane to fin bracing cable.
The entire fuselage has been weathered and sealed.

So now it's on to the lower wing, followed by scratch building the skeletal undercarriage assembly, which unfortunately is not available as a 3D printed part.

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/16/19 05:03 PM

Mike;

It looks magnificent Sir!! A splendid superior piece of work!

Can I suggest that you "NEVER ATTEMPT TO SHIP IT ANYWHERE" !!!!

Best Regards
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/17/19 04:54 PM

Hi all,
The 3D printed lower wing is detailed enough, but as normal there are details that can be added to make it more authentic.
Early production Fokker D.VII aircraft were fitted with bracing tapes that were routed across the wings between the front and rear wing spars and between the rear wing spar and the wing trailing edge.
These tapes were routed in a diagonal ‘zig-zag’ form, up and over each wing rib.
However later production aircraft were fitted with 10 mm square strip wood as replacements for the earlier tapes.
The 3D printed wings represent the later, strip wood version.
Although these strip wood struts can be left to make the model build easier, I've chosen to remove the wings strip wood struts and represent the earlier bracing tapes.

In addition, the two wing halves, when test joined at the centre section spars, showed a higher than expected dihedral angle.
Therefore I had to shave away material from the spars to achieve the correct angle.

Finally the leading edges of both wings were fitted with 'saw tooth' plywood fairings, which will need to be scratch made, as will the trailing edge support wire for attaching the linen covering.

So far:
Spars adjusted.
Strip wood bracing removed.
Diagonal bracing struts added to inner and outer trailing edges.
Holes drilled at the wing strut attachment points for attaching the wings internal cross bracing cables.
Wings scrapped clean of wax support material, assembled and primed.

The upper wing, which is in three sections, will require similar treatment.

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/18/19 12:30 AM

Never realized the internal wing had early and late variations. What source did you reference that from Mike?
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/18/19 09:53 AM

Hi Rob,
Don't worry about shipping this - it's staying right here!!
References from various drawings and books, like those below,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/18/19 11:46 AM

biggrin
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/18/19 04:01 PM

Hi all,
The leading edge plywood 'saw tooth' fairing is tricky to do, but can be done.
Structure drawing of 1/72 scale resized by 160%, then printed, cut out and used as a template on 0.2 mm thick plastic card.
The fairing is test fitted and adjusted where necessary then secured in position using thin CA adhesive.
Starting on the top of the front wing spar then once set, rolling the wing over the fairing and applying adhesive at the same time.,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/20/19 09:13 PM

Hi all,
The lower wing is nearing completion.
It's been painted with 'Tamiya' base coat then oils for wood effect.
Internal wing bracing with turnbuckles added.
Leading edge 'transportation 'bump stops' added.
Internal double bracing 'zig-zag' tapes installed (instead of the original 'strip wood' struts, which were removed).

I still have the trailing edge wire to install (for attaching the wings linen covering).
Also the final weathering will need to be added


Mike

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Posted By: MFair

Re: OT - Fokker pair No.2 - 05/20/19 10:40 PM

Amazing work Mike. You give us mortals something to aspire too. I can’t wait to see this one finished.
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/21/19 02:34 AM

Mike what are the "leading edge transportation bump stops" and where is that located?
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/21/19 04:53 PM

Hi Rob,
When the wings were removed for transportation, they were stacked vertically on the leading edges as they were the strongest edge. 'Bump stops' ('stacking pads') were fitted into the leading edges to keep the leading edge surfaces clear and prevent any damage.
On the wing leading edge, you can just make out these pads, one fitted to each side of the wing, forward from the wing strut mountings.

The lower wing is finished now, with the trailing edge wire fitted and overall 'dumbing down' carried out using 'Alclad' Light Sheen lacquer mixed with 'Tamiya' Smoke (X19).

So now it's on to scratch making the undercarriage fairing and axle assembly (not available as a 3D printed part),

Mike

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Posted By: MFair

Re: OT - Fokker pair No.2 - 05/21/19 06:32 PM

Mike, so did you carve your initials on a spar, or leave a good luck note tucked in the wing for the pilot? Again, your attention to detail is amazing. Next time I see a model of a DVII I can say, “I see you left off the bump stops.”
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/21/19 07:42 PM

Good one MFair, I wish I had thought of that biggrin ! It's still do-able!!!


Mike:

Thanks for explaining the bump stops details.

I looked back over all your posts and couldn't find a reference to what the source material was for the wing bracing tape.

Best regards to all
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/22/19 07:12 PM

Hi Rob,
Early Fokker D.VII aircraft had tapes between the front and rear wing spars and between the rear spar and trailing edge.
Later aircraft, such as those produced by OAW, replaced the tapes with strip wood.
Other had tapes and strip wood.,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/22/19 08:05 PM

Originally Posted by Sandbagger
Hi Rob,
Early Fokker D.VII aircraft had tapes between the front and rear wing spars and between the rear spar and trailing edge.
Later aircraft, such as those produced by OAW, replaced the tapes with strip wood.
Other had tapes and strip wood.,

Mike

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Mike I didn't properly explain my question. I was interested in what material you used for the tape rather that the source reference material. Was it scratch built tape and if so what did you use?
Curious minds like to know! biggrin
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/24/19 07:31 PM

Aaah - wrong sauce mycomputer

It's made from 0.2 mm thick plastic card, cut into thin strips.
Pressed gently with finger tips to form it over the wing ribs then secured in place with thin CA adhesive.

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/24/19 07:37 PM

Hi all,
The undercarriage fairing assembly is basically built.
Made from 0.8 mm and 1.0 mm thick plastic card, 1.2mm, 0.8 mm and 0.5 mm brass rod and tube.
The wheels are hand made by 'Steve Robson' out in Australia.

It's still to be finalized and painted etc.
I'll also need to make the struts as the kit supplied items fit into the kit fairing and therefore are not long enough to attach to the angled support blocks on each side of the exposed axle box ends,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/24/19 07:51 PM

Originally Posted by Sandbagger
Aaah - wrong sauce mycomputer

It's made from 0.2 mm thick plastic card, cut into thin strips.
Pressed gently with finger tips to form it over the wing ribs then secured in place with thin CA adhesive.

Mike


Thanks for that Mike, I suspected it was some type of ribbon material, but then again as an after thought I suspect the weave would be too course and out of scale.
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/24/19 07:52 PM

Those wheels by Steve Robson look amazing and such a small scale at that.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/26/19 02:52 PM

Yes the wheels are something else - hand made using sterling silver for the rims - real works of art.
Obviously not cheap but for this sort of model they're ideal,

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/27/19 01:10 PM

Hi all,
The basic undercarriage assembly is done now.
I still have the undercarriage struts to make and attach before I can fit the assembly to the fuselage frames,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/28/19 07:01 PM

Hi all,
The lower wing is now installed, with some slight adjustments to clear the fuselage side frames and to give adequate access to the single wing strut mounting location.
Next is the undercarriage, once I've completed making the undercarriage struts from brass tube and rod,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/28/19 09:30 PM

Hi all,
Front undercarriage struts made using 1.4 mm brass tube and 0.5 mm brass rod, soft soldered for strength,

Mike

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Posted By: MFair

Re: OT - Fokker pair No.2 - 05/28/19 10:41 PM

Mike, it seems 1.375 tubing would be more to scale. Just an observation biggrin As always, masterful work Pard.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/29/19 02:15 PM

Actually Mark I was intending to use 1.375 mm tubing, but sadly I'd run out so was forced to use 1.4 mm tube - I know it's not in-scale but hey ho winkngrin
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/29/19 02:28 PM

Hi all,
Just a lick of paint on the struts and cross bracing to attach and the undercarriage is done,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/29/19 07:48 PM

Originally Posted by Sandbagger
Hi all,
Front undercarriage struts made using 1.4 mm brass tube and 0.5 mm brass rod, soft soldered for strength,

Mike

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I like this paired shot of comparisons Mike. The skinned and unskinned look! Nice touch
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 05/29/19 10:17 PM

Hi all,
I'm calling the undercarriage assembly done.
The wheels are not permanently fitted yet - they'll be the last thing to be fitted.

So now onto the upper wing and struts etc,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 05/30/19 12:59 AM

Mike I can hardly wait to see the finished Diorama. It's going to be cracker!!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/01/19 01:37 PM

Hi all,
The upper wing has been assembled and the plywood 'saw tooth' fairing added,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/04/19 09:04 PM

Hi all,
The upper wing is nearly there.
I just have the ailerons and their control cables and associated pulleys to add, plus the trailing edge wire.
After that it'll be fitting the wing and struts, engine exhaust and propeller, wheels and aileron control cables connected - then that'll be it,


Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/05/19 08:23 PM

Hi all,
The aileron outer control cable pulleys are fitted.
Made from photo-etch set intended for the Sopwith Triplane and modified to suit the Fokker D.VII pulleys.
The control lines are loosely routed for now.

Next are the inboard pulleys,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 06/05/19 08:31 PM

You are getting so close to finish! Only nine days left until the 14th!
It's been a long build but it is going to be worth it I'm sure!

Best Regards
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/05/19 08:47 PM

Hi Rob,
Yeah getting there.
Actually it's the 16th, but its still going to be tight - we'll see,
The display case arrived today so that'll need sorting as well.

Mike
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/07/19 12:29 PM

Hi all,
The inner aileron pulleys and the inner wing control lines are done.
Once I've added the trailing edge support wire for the linen covering, it'll be time to tackle fitting of the upper wing,

Mike

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Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 06/07/19 01:28 PM

Mike it's been like watching a jigsaw puzzle come together. Can't wait to see the whole picture.
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 06/07/19 01:32 PM

Hi Mike
It's been like watching a jigsaw puzzle come together.
I can't wait to see the finished picture.

In fact, how about taking a video by cell phone for the full 360 degree look when you are finished!! Just put the dio on a turntable and video while slowly turning it.
That would be so cool.

Best Regards.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/07/19 02:06 PM

Hi Rob,
Maybe - we'll see.

Trailing edge support wire added,

Mike

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Posted By: MFair

Re: OT - Fokker pair No.2 - 06/07/19 02:38 PM

Mike, seems you are really close on the current masterpiece. Inspiring work!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/07/19 04:52 PM

Cheers Mark.

Hi all,
The aileron control cable exterior turnbuckles now fitted.
Next step - fit the upper wing,

Mike

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Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/09/19 11:58 AM

Hi all,
Nearly there!!
Upper wing and wing support struts fitted.
Wheels fitted.
Twin aileron control cables (upper wing to cockpit) connected with turnbuckles.
Propeller finished.

I just need to fit the exhaust and propeller and that's it.

Mike

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Posted By: RAF_Louvert

Re: OT - Fokker pair No.2 - 06/09/19 12:32 PM

.

Wow! I mean - just wow!

.
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 06/09/19 01:01 PM

Ahh Mike, almost there!
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/09/19 03:32 PM

Hi all,
Last bits fitted.
Propeller, exhaust, pilot's foot step and the two rear fuselage rear lift handles.

Just the display case and base to complete this build, but that shouldn't take long to sort out,

Mike

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Posted By: Fullofit

Re: OT - Fokker pair No.2 - 06/10/19 01:54 AM

Beautiful work Mike. Thank you for doing these progress reports. I’ve learned so much about the D.VII anatomy just by following your thread. Awesome stuff.
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/10/19 11:53 AM

Hi all,
The 'skeletal' Fokker D.VII is finished now.
All I have to do is the display base, which I'll post once it's done.

I know I don't often reply to your generous comments, but rest assured they are very much appreciated,

Mike

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Posted By: lederhosen

Re: OT - Fokker pair No.2 - 06/10/19 01:10 PM

Holy Sh-- !
I hate people who can do this sort of thing.

but you forgot the Balsa paper covering and the laggy-band for the motor
amatuers these days.....
Posted By: CodyCoyote

Re: OT - Fokker pair No.2 - 06/10/19 01:57 PM

This is your best in a long line of exquisite models. Museum quality. Did you track the total number of hours you put into it?
Posted By: Robert_Wiggins

Re: OT - Fokker pair No.2 - 06/10/19 03:09 PM

Mike, It looks fantastic! It's been a long road to completion but well worth the effort! I shall be looking closely at those pics for some time to come. I am seriously thinking of screen savers!!

Hope your base comes in time to complete it for the show.

Best Regards
Posted By: Sandbagger

Re: OT - Fokker pair No.2 - 06/10/19 05:03 PM

Originally Posted by CodyCoyote
This is your best in a long line of exquisite models. Museum quality. Did you track the total number of hours you put into it?


Around 18 weeks for both Fokker D.VII models and associated figures,
Mike
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