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HomeAircraftHelicopterMain Discussion › Can anyone identify this swash plate driver??
09-11-2015 02:02 AM  33 months agoPost 1
tjk1812

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sunbury, ohio - USA

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I'm hoping the pic is good enough. I have GMP Cobra mechanics and a flybarless head..My swash plate driver is a single ball link but is not cleated on the mast..hence it moves freely so the phasing will be incorrect. There is a machined slot in the mast for perhaps a set screw, however, there is no threaded hole in the driver to run it through. One side of the driver has a threaded bolt and nut that run through it to "clamp" the driver on the mast, but I wasn't sure if that "clamping" force with no set screw would be enough to keep the phasing correct. Any ideas or input? Thanks.

Tom

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09-11-2015 02:21 AM  33 months agoPost 2
crflyer

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Maine

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Clamping it will hold fine. All mine are a clamping style swash drivers.

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09-11-2015 02:33 AM  33 months agoPost 3
tjk1812

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sunbury, ohio - USA

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Ok..thx for the help..just want to be sure.

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09-11-2015 03:00 AM  33 months agoPost 4
rcflyerheli

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Granbury, TX USA

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Looking at your photo, it appears to me that the clamping action in your case is going to be on the ball or pivot point for the driver arm.

As such, I'm not sure how tightening down on the clamping screw will fix the driver onto the main shaft. If it were clamping directly onto the main shaft, I would agree with crflyer.

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09-11-2015 03:07 AM  33 months agoPost 5
tjk1812

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sunbury, ohio - USA

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Yes, it would "bite" onto the main shaft by tightening the bolt and nut. The driver (it's difficult to tell in pic) has a slot or gap, almost like a jaw on the side with the bolt and nut..about a 1/16th" gap..so if you were to tighten the bolt, because of the gap, it can "bite" or "clamp" itself to the main shaft. I've always seen set screws used to fix the driver to the main shaft, just wanted to make sure I wasn't missing something. Thanks for the help thus far.

Tom

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09-11-2015 05:38 AM  33 months agoPost 6
TMoore

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Cookeville, TN

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That's an old style Hirobo/GMP Swash driver. Be careful, they were prone to cracking so there's no need to get the clamp bolt tighter than you need it.

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09-11-2015 02:05 PM  33 months agoPost 7
gwright

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Champaign Il

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I learned on a gmp cobra many years ago. Heed Terry's comment above and just snug it down nicely. Clamping is actually better than a setscrew.

Gary Wright

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09-12-2015 02:05 PM  33 months agoPost 8
tjk1812

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sunbury, ohio - USA

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Just want to say thanks for everyones help thus far..this heli is my winter project and I'm really excited to get it in the air next spring. I bought it used from a hobby store..it was a dust collector. This thing needs to be flown, and because I've never flown a flybarless I want to go over it thoroughly. I'm probably going to add the futaba 750 3 axis gyro to keep it more stable. It's sanded and my paint from klass kote is on it's way.

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09-12-2015 05:28 PM  33 months agoPost 9
crflyer

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Maine

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Looks like a great winter project, good luck and be sure to post some progress pictures for us.

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