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Inside view of TM HOTAS Warthog


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  • 2 months later...

Based on the Molykote-soltion I made a follow-up to this thread: Greasing up the Warthog.


Edited by tietze

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  • 4 weeks later...
  • 5 weeks later...
  • 4 weeks later...

Hello all,

 

Thanks I'm going to try the removing of the central spring today (I never liked the strong recentering) however I have a two very quick questions before attempting this:

1) If you applied the no-center-spring mod, are you still happy today after a few months with the result, or did you endup adding washers?

 

2) Anything contrary to spraying a little silicongrease over the current grease? I'd rather add silicongrease rather than washing the ball and risking severing cables and greasing it again from scratch. (fyi silicongrease is oily and non-corrosive for plastic so should be harmless).

 

THanks for your support guys!

Luca

Simultools

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2) Anything contrary to spraying a little silicongrease over the current grease? I'd rather add silicongrease rather than washing the ball and risking severing cables and greasing it again from scratch. (fyi silicongrease is oily and non-corrosive for plastic so should be harmless).

 

I wouldn't mix greases, at best, the very low viscosity silicon grease will wash the thick grease out, at worst the two greases could react and cause a mess. Safe bet is to not mix the grease.

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thanks for the tip, I'll leave the current grease then

(I just wouldn't want to mess with washing the pieces for fear of damaging the wires, I have a bad record when it comes to be gentle with wires).

 

However I'll go ahead and remove the main spring :)

let's hope the four springs will be adeguate and won't wear out for a long time.

Is anybody using washers in the end? does it detract in smoothness?

 

thx

L

Simultools

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thanks for the tip, I'll leave the current grease then

(I just wouldn't want to mess with washing the pieces for fear of damaging the wires, I have a bad record when it comes to be gentle with wires).

 

However I'll go ahead and remove the main spring :)

let's hope the four springs will be adeguate and won't wear out for a long time.

Is anybody using washers in the end? does it detract in smoothness?

 

thx

L

 

If you put four small springs to the top (if that's what you're planning), you loose much of the travel, because the ring doesn't rise to the top. I cut away some of the main spring, first the top flat turn, then another quarter, to get the resistance i wanted.

 

IMO, you should leave the main spring in.

[SIGPIC][/SIGPIC]
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I removed the main spring and moved the small four ones at the top.

it was better but a hair too soft so I took four 2.5mm washers and applied them at the top between the round metal plate and the springs, this way the don't create friction as they don't go up and down but still keep the four springs compressed. I've also introduced a little silicon grease on the four metal pegs and springs, I think it helps.

I quite like it now, I might consider cutting the main spring but for now i'm quite satisfied, thanks

L

Simultools

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  • 3 weeks later...

I semi-dissassembled the stick. Put some "slick-honey" grease on the ball and that helped alot! Everything was very dry inside, maybe the grease machine was having a bad day on the assembly line??

 

Did the spring mod but it was too little tension. Be nice to be 1/2 way between the big spring and the small...

 

Is it possible to acquire replacement springs? Would be good for fine-tuning.


Edited by spikenet
update.
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  • 2 weeks later...

Though this is a old thread, keep in mind how friction works. There are two kinds of friction applied to this scenarios. Static friction, when you try to move the stick but haven't managed to get it going yet, and kinetic friction when the stick is already moving.

The problem is that for any given surfaces and lubricant, static friction is always higher than kinetic.

 

To overcome this problem, where "infinite" smoothness is required, you need to use materials that have the same static and kinetic friction coefficients. A good such material though probably not the best is polished iron and perhaps the worst is scratched plastic. Teflon is I think our best possible material.

http://ffden-2.phys.uaf.edu/211_fall2002.web.dir/ben_townsend/staticandkineticfriction.htm


Edited by xhaos
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no teflon grease will not stay, you would need to mod it in such a way that you build like a bathtub and fill it with grease so that the join is always submerged in it. What needs to be done is that you should cut the plastic parts and replace them with polished iron.

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I have a good idea what is being refered to though I am somewhat surprised that they would make it available like that.

 

AFIAK it is still not public domain.

 

EDIT: ...and I have no idea who the post is directed at (read back two pages or so)


Edited by cichlidfan

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I have a good idea what is being refered to though I am somewhat surprised that they would make it available like that.

 

AFIAK it is still not public domain.

 

EDIT: ...and I have no idea who the post is directed at (read back two pages or so)

 

I'm a member but don't know what he means, and now I really want to know. Cant you just tell me?

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I'm a member but don't know what he means, and now I really want to know. Cant you just tell me?

 

The Falcon 4 executable that appears to be available for DL. I sincerely doubt that site has permission to distribute that file.

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This seems like the same problem the X45 and X52 had. The inverse cone that the spring pressed on, developed ridges, that then created the un-smoothness. I used a dry teflon grease which helped, but eventually moved to the Cougar.

 

Considering the mods done to the Cougar, I can definitely see one of you guys making a new ball on ball 'gimbal'. Should be much easier than the Cougar gimbals.

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So in the end what is BEST, PAO (Lithium) based greases ?

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Hi guys

 

I have been following this thread for a while and only just got around to modifying my warthog stick. My background is aircraft maintenance engineering and mechanical design engineering. A couple of things though:

 

I have removed the large spring and placed the four small springs on top of the teflon plate but looking at this, its not a good option as the springs totally compress when the stick is moved all the way in any direction. When you push the stick hard against the stops its the compressed springs that are now those stops. Eventually they will fail if used in this manner. For light use it would be fine for a while. A better option would be to have a large spring made from a lower gauge spring steel, not easy I know.

 

As for binding, this too has plagued my stick and after some investigation I have found the cause to be the teflon plate that slides up and down the four chrome posts. Mine was slightly out of alignment with the four chrome posts so I loosened the screws that hold the teflon plate down and operated the stick mechanism to re-center everything. Then gently re-tightened them. As they are countersunk screws if you tighten too much the countersink could just pull it back out of alignment :(

 

While I was there I also added Molycote to the teflon plate and the rubber ring on the underside of the square opening around stick mechanism.

 

My stick is now as smooth as a babies bum :) Although I will be putting a reduced rate large spring in it at some stage.

 

Cheers

 

NG

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