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#3571575 - 05/12/12 10:10 AM Re: Rudder design ***** [Re: VO101MMaister]  
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VO101MMaister Offline
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Haugesund, Norway
Only a small update. Everything is coming together. In the last month I have finalized the design and made many modifications. I found and ordered standard parts required for the build, including sensors, dampers, springs, bearings ect...
I am also finished now with all the drawings, and got the workshop who will make the parts.

The main change on the pedal design was that I skip the gas spring as main tensioning element. It has too flat spring characteristic + they are not designed for a high frequency usage. Therefore I put a standard extension spring in, and an additional hidraulic damper cylinder.

I also decided to use a simple steel plate base. It is cheap and it will be very easy to mount into the floor of a cockpit stucture. Later I can attach any mounting fitting to it if necessary. So it is very flexible.

The machining and cutting of the parts will start in June. Hopefully I can assemble everything in July:)

Some pictures. Hopefully the very last rendered ones:)


pedal1



pedal2

The pedal castings require some polishing and filing. So I started it as well. On the left is the orginal, on the right is the "almost" finished:)


DSC_0182[1] salute

Inline advert (2nd and 3rd post)

#3608120 - 07/16/12 08:42 PM Re: Rudder design [Re: VO101MMaister]  
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VO101MMaister Offline
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Haugesund, Norway
I finished today with the assembling of the rudder mech. It is awsome, I am really happy with it. I removed the two small linear dampers from the top, they were just too weak. I will add later a strong rotary damper instead. Changing the load character is also possible later with the CAM`s modification.

The pedal castings are not finished yet so they are cool decoration only on the pictures:)


DSC_0964 by csaba.moharos, on Flickr


DSC_0966 by csaba.moharos, on Flickr


DSC_0962 by csaba.moharos, on Flickr


DSC_0961 by csaba.moharos, on Flickr

cheers
MM

#3636592 - 09/02/12 07:53 AM Re: Rudder design [Re: VO101MMaister]  
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Can you provide measurements for those pedals? Just overall length, width and depth.
Thanks in advance.

#3636687 - 09/02/12 03:07 PM Re: Rudder design [Re: scottgze]  
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VO101MMaister Offline
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Originally Posted By: scottgze
Can you provide measurements for those pedals? Just overall length, width and depth.
Thanks in advance.


Are you looking for the size of the toepedal castings or the overall dimensions of the construction?

#3636706 - 09/02/12 04:01 PM Re: Rudder design [Re: VO101MMaister]  
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scottgze Offline
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Thanks for the reply.
Just the castings.

#3636764 - 09/02/12 05:39 PM Re: Rudder design [Re: scottgze]  
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VO101MMaister Offline
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Haugesund, Norway
Height: 290mm
Width: 117mm
Depth: 120mm (including the bottom boot flange)

#3637056 - 09/03/12 02:00 AM Re: Rudder design [Re: VO101MMaister]  
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scottgze Offline
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You sir, are a gentleman. Thankyou.

#3637227 - 09/03/12 11:47 AM Re: Rudder design [Re: VO101MMaister]  
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smil Offline
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A very simple design. Outstanding work!

salute!

#3637333 - 09/03/12 02:43 PM Re: Rudder design [Re: VO101MMaister]  
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Not simple at all. But the quality of the engineering makes it look like it is.

How is the cam profile and spring working out?

#3637354 - 09/03/12 03:13 PM Re: Rudder design [Re: Brigstock]  
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VO101MMaister Offline
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Hi Brigstock,

it works very well. Nice linear feeling both ways with smooooth travel. A bit way too smooth actually, some friction would be nice. Probably I will do some experiment with additional hydraulic damping, and different CAM profiles.

What is in my way is the lack of the testbed to screw the pedals and the stick on. So no real testing were done so far. A simple testbed is under constraction and I move to a new house, where I will have the space for it:)

Some pictures

pedal-3 by csaba.moharos, on Flickr


pedal-6 by csaba.moharos, on Flickr

#3638797 - 09/05/12 12:32 PM Re: Rudder design [Re: VO101MMaister]  
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scottgze Offline
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That looks stunning!!

#3641552 - 09/10/12 09:27 AM Re: Rudder design [Re: VO101MMaister]  
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Brigstock Offline
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Nicely shown off there MMaister. You get a real feel of how much work has gone into them.

I love my Simpeds, but what I wouldn't give to have your skill.


Probably a little nerdy of me but

Originally Posted By: VO101MMaister



is now my desktop wallpaper smile


BTW any plans for a throttle assembly to compliment the stick and pedals?

#3641584 - 09/10/12 11:26 AM Re: Rudder design [Re: Brigstock]  
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VO101MMaister Offline
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Hey Brigstock,

sexy wallpaper, i have to admit:)
I don`t plan to make throttle at the moment. Actually one loses a good amount of functionality when replaces a HOTAS stick with a 4 button warbird stick. I wanna keep the HOTAS throttle to have enough buttons, switches and axis for keyboard-free control.

#3643401 - 09/13/12 09:08 AM Re: Rudder design [Re: VO101MMaister]  
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Originally Posted By: VO101MMaister
Hi Brandano,Sokol1,

I know Baur`s work it is very inspiring, but we both use a well known technical solution used in hydraulic steered aircrafts. It is called "the feel and centering unit" what can be seen here:
feel and centering unit
I did not know this when I made my pedal. According to my work, you have made a copy. You need to have a conscience. Say - as well as at the Baur.

I do not speak English. I think you do not understand: (

Congratulations - a very good pedal.

#3643457 - 09/13/12 12:23 PM Re: Rudder design [Re: Baur]  
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Hi Baur,

I am sorry if you feel like this. As I wrote, your work was inspiring, but the solution is not yours, but some guy`s at Boeing. So it is not correct to call it to a copy of your concept.

my friendly regards
MM

#3643567 - 09/13/12 02:57 PM Re: Rudder design [Re: VO101MMaister]  
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All up to us smile

#3673762 - 11/01/12 10:33 PM Re: Rudder design [Re: VO101MMaister]  
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VO101MMaister Offline
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While the house is not ready to assemble my gear yet, I decided to do some development on the design.

I am working on a damping solution for the pedals. I think it will be a great addition and will increase the realistic feeling.
The damper I use is a steering damper for motorcycles (I bought it on e-bay). It has a strong, adjustable effect, and it is sturdy enough to survive the torture. The downside is that the original design was not prepared to accept a big damping cylinder, so I have to squeeze it in. I also have to use the mounting gear what came with the cylinder. Luckily it is possible. It will stick out a bit though.


001 by csaba.moharos, on Flickr


002 by csaba.moharos, on Flickr

#3765561 - 04/10/13 11:42 AM Re: Rudder design [Re: VO101MMaister]  
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WOOOOW :-)
Great pedals. I must say I registered to this forum to comment on this!
I built my own pedals a while ago on woodworking CNC with Fundermax Maxcompact material - similar to bakelite. Big mistake was not doing reasearch prior doing it :-) I tried to make it easy project. Later I adopted Simed pedals style centering.

If anyone is intrested in my design it's no good becouse :
1. sliding rudder need greasing ...under a desk in a dusty enviroment it's a bad idea. I added 4x wheels on each pedal later but its too much friction for me, specialy becouse pedals are high above slider which contribute to forces causing friction.
2. CAM centering is better than simped's, simply to adopt different strenght along the curve and nicer center feel
3. I used 100N pneumatic compression cylinder for brakes. Cylinder is a standard part in furniture industry and quite affordable - 5 Eur, but it's lenght forced me to use it under this angle - and it's too weak. Under a more narrow angle between pedals it would be more suitable as it would use more compresive lenght of cylinder...so it's better to use spring or smaller cylinder like Vo101mmaister did.

To Vo101mmaister:
I am going to make new design, similar to yours but using cheaper materials (bakelite-alike 10mm board,springs,ballbearings). If you are willing to share your drawings it would speed me up a lot :-). I'm most intrested in centering cam and spring desing...if it's working for you why not use same dimensions and CAM curve,bearing diameter.
Also what's your distance - center to center between pedals, and how much travel? I used 25 degree travel angle, 350mm centre to centre, 310x120mm foot support ( bit long, everything else is ok for my legs :-).

Also you didn't comment on which controler board and sensors/pots did you go for and how happy are you with those ?

Thank you in forward and regards to all
Milan

#3768290 - 04/16/13 03:51 AM Re: Rudder design [Re: VO101MMaister]  
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Hey VO101MMaister, what are the two lower bearings that you used, visible in this pic?

I tried using a lazy susan bearing, but mine is not smooth, and has too much lateral movement.

Originally Posted By: VO101MMaister



#3768393 - 04/16/13 11:55 AM Re: Rudder design [Re: julian265]  
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VO101MMaister Offline
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Hi chaps,

sry I was away from this thread for a while. I have been very busy recently and have had very little time to finish my controller projects. But last week I installed the damper, and it seems to be very good.

Here are some answers for your questions.

Originally Posted By: milan_croatia


To Vo101mmaister:
I am going to make new design, similar to yours but using cheaper materials (bakelite-alike 10mm board,springs,ballbearings). If you are willing to share your drawings it would speed me up a lot :-). I'm most intrested in centering cam and spring desing...if it's working for you why not use same dimensions and CAM curve,bearing diameter.
Also what's your distance - center to center between pedals, and how much travel? I used 25 degree travel angle, 350mm centre to centre, 310x120mm foot support ( bit long, everything else is ok for my legs :-).

Also you didn't comment on which controler board and sensors/pots did you go for and how happy are you with those ?


Hi Milan,

I can`t share drawings or actual documentation, but I will be happy to help you to make your own design. The center to center and travel specs must be checked. I will do it when I will be at home and post them here.

The controller is Leo bodnar`s BU0836A type
The sensors are Magnetoresistive sensors, made by a talented ukrainian guy.




Originally Posted By: julian265
Hey VO101MMaister, what are the two lower bearings that you used, visible in this pic?

I tried using a lazy susan bearing, but mine is not smooth, and has too much lateral movement.



Hi Julian,

the bearings are standard cheap Y-bearings in pressed plate housings.
The one I use is made by INA its part no. is RATY 15 for the housing and AY15-NPP-B for the bearing

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