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#4175148 - 09/29/15 11:01 PM A few questions for a gimbals project.  
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Aullido Offline
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1 Which is the recommended minimum thickness for the material (Aluminum or Steel) that can withstand the forces an abuse of a long stick?

2 Which was the motion travel of the Bf 109's stick.

3 Which is the actual motion travel of the Warthog.

4 Any recommended force to keep the stick up (in Newtons to avoid jokes.)

Thanks.

(3...2...1..: Sokol)


Last edited by Aullido; 09/29/15 11:13 PM.
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#4175192 - 09/30/15 12:09 AM Re: A few questions for a gimbals project. [Re: Aullido]  
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LocNar Offline
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1. This is 100% dependent on the architecture of your gimbals. Stick length scales linearly, so whatever works at 6" takes double at 12" etc.

2. dunno, but many here do

3. +/- 40 deg on the Warthog kinematics.

4. it's pretty subjective, some like light some like firm and is also situationally dependent


...I'm well under way (cutting metal already, designs started >year ago...) of making new all metal/ball bearing gimbals that will replace the Warthog's while retaining the 90333 sensor and using the m36x2 mounting stem/mini DIN socket.

I am making 3 different types of centering mechanisms (2 different types of cam centering and 1 similar to CH Products/Slaw/VKB dual pendulum arrangement), configurable for several purposes and configurations and scaleable for long sticks.

#4175212 - 09/30/15 01:51 AM Re: A few questions for a gimbals project. [Re: Aullido]  
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Wolfstriked Offline
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This is just most wonderfully great news!! Just searched Google for an hour for Warthog gimbal mods,gave up and then spot this post. smile

As for the light or heavy stick preference,I prefer heavy and even searched how to get a tiny bit more strength for the warthog.Has to be smooth and progressive though or its just a mess.

Funny story,yesterday I unboxed my Warthog and as I went to take the stick out of the plastic bag it fell out the open end.In an instant my hand was underneath it as there was no way I was gonna let my brand new Warthog smash to the ground and Voila.....I almost broke my hand!!The thing is so dam heavy that when it hit my hand I I instantly laughed(even thru the pain) at my insistence on having to have an all metal stick!! biggrin

Last edited by Wolfstriked; 09/30/15 01:52 AM.
#4175398 - 09/30/15 03:48 PM Re: A few questions for a gimbals project. [Re: Aullido]  
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Sokol1 Offline
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V0101MMaister project is good reference:

http://SimHQ.com/forum/ubbthreads.php/topics/3672349/Re:_Gimbal_design#Post3672349

#4175636 - 10/01/15 12:44 AM Re: A few questions for a gimbals project. [Re: Aullido]  
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Aullido Offline
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Unfortunately that post doesn't have much information. According to his design He used 630 N strings, that is a lot considering than a N is close to a Kilogram-Force. He reduced the force to 35 N, I think this is the force needed to keep the stick upright.

I want to avoid using CNC parts as much as possible. as some people has noted, low quantities are expensive. My goal is to use mass produced industrial parts to assemble the gimbals. I think a 0.5 aluminum thickness is a safe bet. My mayor concern is structural stiffness. I plan to spend about $300 dollars on this project.

Somebody have a CAD file of the BF-109 stick? I will use my Warthog grip but in the future maybe I will buy a KG-13 grip. I plan to use aluminum pipe to duplicate it.

#4175650 - 10/01/15 01:10 AM Re: A few questions for a gimbals project. [Re: Aullido]  
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Sokol1 Offline
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Why not buy Bauer gimbal instead adventure in build one without proper tools?

http://avia-sim.ru/forum/viewtopic.php?t=758&sid=e28e0ac5fb741f1b7ff56a2a453eeb0a

#4175692 - 10/01/15 03:28 AM Re: A few questions for a gimbals project. [Re: Aullido]  
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Aullido Offline
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I think I am being infected by the cockpit building bug, I am semi-retired.

I don't live at the US. I can easily import product from the US to my country but knowing my Country's customs, the most probable outcome is that I will never receive the gimbals. Unless it is send in pieces maybe. Does Bauer's gimbals use the same sensor than the Warthog?

Thanks.

#4175712 - 10/01/15 05:03 AM Re: A few questions for a gimbals project. [Re: Aullido]  
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Sokol1 Offline
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I think Bauer sold the gimbal in kit form (besides assembled), to be assembled with rivets and nut&bolts.
The advantage is to be a project that has been under development for several years.

But is not done for 3D HALL sensor, is for HALL sensor independent on X and Y axis.
I think the assembly holes is for Komaroff digital sensor - need specif USB controller, or MagRez analog - work with any USB controller.

If you plan use the 3D HALL sensor of Warthog (Melexis MX90333) is need some kind of "esferical" gimbal.

#4175746 - 10/01/15 09:22 AM Re: A few questions for a gimbals project. [Re: Aullido]  
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VO101MMaister Offline
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Originally Posted By: Aullido
1 Which is the recommended minimum thickness for the material (Aluminum or Steel) that can withstand the forces an abuse of a long stick?

2 Which was the motion travel of the Bf 109's stick.

3 Which is the actual motion travel of the Warthog.

4 Any recommended force to keep the stick up (in Newtons to avoid jokes.)

Thanks.

(3...2...1..: Sokol)



1. It is impossible to tell without knowing the layout. As an idea from sheet metal(steel) I would not go under 2mm.

2. +/- 17,5deg

3. Someone wrote +/- 40deg

4. It is very subjective. A real plane`s controls are usually quite light up to cruising speed, but can be very stiff at high speeds. Important rule is that the aileron control`s have lower force than the elevator for ergonomical reaons. Recommended relation between Elevator / Aileron forces is about 2/1.

I personaly chose light forces, because it gives more precision and controll + less fatigue. Also most of the time the controls are light in a real aircraft except at extreme speeds. I have elevator/aileron at full deflection = 30N/15N + damping.

#4175932 - 10/01/15 05:26 PM Re: A few questions for a gimbals project. [Re: Aullido]  
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Wolfstriked Offline
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For me a heavy force but silky smooth stick is where its at,sorry to the people who feel the warthog is to heavy.Heavy force because it allows you to fly the plane with muscle memory where you pull the stick back and judge how much you are pulling the stick back by how much back pressure you feel.How I think the perfect stick should feel is easily demonstrated with the warthog stick.If you lean the warthog stick forward the weight of the stick causes it to be heavier when you are pulling backwards and really gives a nice feel of pulling back thru the wind on the elevator.


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