11-14-2011, 08:06 PM
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#23 (permalink)
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Registered Users
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Quote:
Originally Posted by ethereal sky
You were right about the tail hub, but, it isn't happening over time, it came like that new and the wobble is caused by the fact that the hole through the hub has too much clearance with the shaft inside of it. Rather than modifying the screw I want to fill the space between the shaft and hub, which is what's actually causing the wobble(I have really good eyes and can see the extra space). Not that your method doesn't work. I think compass should know about it so they maybe could start producing hubs that fit more snug on the shaft or maybe produce shafts that take a cap screw that sets into the side of the hub just a bit. Regardless this is not what caused my recent problems as I have been flying the 7hv like this since it was first built. However, this issue with the tail hub does in fact cause the tail flutter in FFF, FRF and FSidewaysF that everyone has been having trouble getting completely tuned out(I think). From my experience it does not effect the ability of the heli very much if any or the tail gain once its dial in, but, I am concerned that it might cause things to wear out prematurely on the tail. And it may make it more difficult for some people to get their tail gain dialed. And being that it's a part that shouldn't be moving in the first place it will always get worse with use(which is maybe why some people don't notice it fresh built but until they have a bunch of flights on it already). I actually noticed this when I built it straight out of the box but it flew right so I forgot until you reminded me. Thanks for reminding me I meant to do some thing about that sooner. The only non-soft material I can think of to fill that space is to go the opposite route you did and actually flood the space with blue locktight(so i can still get it off when I need too)and let it set till the next day. And if blue doesn't stop that wobble then red probably won't make it impossible to take off(which probably doesn't matter anyway cause if i need to take that apart its broken already and I'm sure I'm not the only person on here thats had to cut a tail shaft in the past after a crash). I'm not saying you're wrong at all though I just want a more definite and permanent fix. I want us all to have a perfect heli and the 7hv seems close fresh out of the box.
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Not actually being caused by the screw.
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