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Next-D › Rave 4S: Head block rocks on mainshaft
04-30-2010 09:35 PM  8 years agoPost 1
ChrisW

rrApprentice

Bonsall, CA

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Guys,
Flew my 4S Rave at lunch today...Noticed that the headblock was rocking on the mainshaft...Is this common?

Is there a fix for it? The Outrage Velocity 50 has that problem and it is fixed by pressing the bottom of the block in a vice.

Thanks!
ChrisW

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05-03-2010 03:54 PM  8 years agoPost 2
Goose(is dead...)

rrApprentice

UK

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Hi Chris,

I've been flying the Rave pretty much from day one. I never had any interest in an electric or a small Heli. But I took a punt and love my Rave to death. But it took me a good 12 months to truely connect with it, how to build / replace bits correctly. I would over tighten screws and broke heaps! Of heads of screws. Would use too much locktite. The hardest lesson was learning to set the gear mesh. Yes, the lads have brought out the stronger black ones for the torque tube gearbox but even then I stripped a set as the mesh I set was too loose. Going tight is just as bad as the will eat each other and you'll lose power through unessacery ( can't spell) friction.

I replaced my head block reacently as i stripped a thread that one of the top mixing arms went into. In doing so, I ended up replacing all ball links and clips. About 200 flights. Think of the stress that poor head block goes through. The Rave is just so responsive and this puts more stress on bits. I'm not for a second saying 'expect parts to wear out' but if you fly hardcore 3d and have racked up a few flights and some good crashes, it might simply be time. Interestingly on head blocks, I was tweaking my 90 and the two vertical pins at the bottom of the head block ( which used to be the phasing ring) were not perfectly vertical and therefore when the washout base was going up and down it was not smooth. This maybe something you could investigate. Yes, the damage is done but at least you might find out the cause. I know I have offered no solution... My suggestion would be to replace the block and the main - hardened - shaft for a fresh start. Very very unlikely it's new and faulty.

Good luck
g

Vibe 90 & 50 WITH flybars (old skool), CY Rave, flying for many years, talent rating, absolute zero

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05-03-2010 05:14 PM  8 years agoPost 3
ChrisW

rrApprentice

Bonsall, CA

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Goose,
Thanks for the insight...
I was able to tighten up the Jesus bolt a bit more and it took the slack out of the head block...BUT...The tiny screws on these size helis are easily stretched & twisted and anytime I have to crank down on them, I get nervous.
I guess I can do some research and find the best material to use for that bolt (hardness, etc.) Anyone already checked into this?
Maybe I'm worrying too much about nothing...

My Rave has become my favorite heli out of all the machines I have in my fleet from 90's, 50's, etc....

If I had to keep only one heli...That's the one.
-ChrisW

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