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HomeAircraftHelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Another vibe 50 in the air!
04-21-2009 12:32 AM  9 years agoPost 21
synodontis

rrKey Veteran

United Kingdom

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No it wouldnt! .005" runout would be great. Mine is at .001" and it is fine. Just as long as you are under .002".
where is the logic in this: "Just as long as you are under .002"" but .005" is fine? Isn't .005" >> 0.002"?

Tony,

I've NEVER loctited the nut to the crankshaft and the nut never lets go on me. This I do on all my JR machines.

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04-21-2009 01:08 AM  9 years agoPost 22
tchavei

rrProfessor

Portugal

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synodontis,

I ALWAYS loctite the nut on any helicopter I own and I never had a nut let go on me either.

Tony


--------------------
"Perfection and patience usually walk side by side..."

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04-21-2009 01:20 AM  9 years agoPost 23
AaronJohnson

rrElite Veteran

mason,MI

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where is the logic in this: "Just as long as you are under .002"" but .005" is fine? Isn't .005" >> 0.002"?
Oppsss. LOL I cant believe I even typed that. I misread how many zeros there were. My bad. LOL I thought the original statement was .0005 not .005" I even re-typed it wrong.

In the words of Carlos Mencia, DEE DEE DEE

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04-21-2009 02:58 AM  9 years agoPost 24
Pulento

rrVeteran

CHILE

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I ALWAYS loctite the nut on any helicopter I own and I never had a nut let go on me either.
I always loctited the nut but recently helped/watched Matt Botos to changed his rear bearing and he didn't use loctite. I asked him and told me that wasn't necessary. Apparently the motor rotation do tight the nut.

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04-21-2009 03:09 AM  9 years agoPost 25
tchavei

rrProfessor

Portugal

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Not sure about that. The nut would have to be locked for the CCW spinning engine to have any effect on tightness but I might be wrong. loctite can't hurt and no collets slipping. Period

Tony


--------------------
"Perfection and patience usually walk side by side..."

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04-21-2009 06:43 AM  9 years agoPost 26
Dood

rrProfessor

Wescanson

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i had difficulties hitting the arizona switch with the pin.
Yep. Easy to turn on, hard to turn off.
Get rid of that pin switch. More trouble than they're worth.

It's easy to modify a standard switch to use with the Arizona.

  ▲
▲ ▲

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04-21-2009 01:53 PM  9 years agoPost 27
ajnstajn

rrApprentice

Slovenia, EU

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Wow guys, thats a lot of replies. Thanks
Did you use a crankcase locking tool? Did you use loctite on the nut itself?
I did make shure the crank wasn't turning and i did use red (jr green) loctite to secure it. I'll tighten it better next time. Lesson learned. I just hope i get parts before spring break.

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04-21-2009 04:54 PM  9 years agoPost 28
Pulento

rrVeteran

CHILE

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There is a point there. How much tight it should be ?

With the collet design if I tight the nut too much it will squeeze the upper collet against the crankshaft threads which will make the disassembly a pain and the upper collet will develop threads and will be almost impossible to remove it from the hub.

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04-21-2009 05:19 PM  9 years agoPost 29
ajnstajn

rrApprentice

Slovenia, EU

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Yes, but i'd still rather have problems with disassembly than stripping collets every five flights.

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04-21-2009 05:25 PM  9 years agoPost 30
tchavei

rrProfessor

Portugal

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With the collet design if I tight the nut too much it will squeeze the upper collet against the crankshaft threads which will make the disassembly a pain and the upper collet will develop threads and will be almost impossible to remove it from the hub.
Being the keyword here "almost"... nothing a hammer doesn't solve

Tony


--------------------
"Perfection and patience usually walk side by side..."

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04-21-2009 07:12 PM  9 years agoPost 31
DoxWrangler

rrNovice

At a flying field near you

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Hammer + Bearings = bad bearings

Fan puller is the way to go

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04-21-2009 07:18 PM  9 years agoPost 32
tchavei

rrProfessor

Portugal

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I was kidding. I use a bearing puller actually, claws grab the hub, center piece against the top of the crankshaft. Has never failed before.

Tony


--------------------
"Perfection and patience usually walk side by side..."

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04-21-2009 07:30 PM  9 years agoPost 33
ajnstajn

rrApprentice

Slovenia, EU

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Does this puller work with vibe 50?

http://www.fast-lad.co.uk/store/jrh...ler-p-2404.html

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04-21-2009 07:41 PM  9 years agoPost 34
DoxWrangler

rrNovice

At a flying field near you

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You never know Tony, some people take you serious....

Don't know about that fan puller, I use the MA one.

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04-21-2009 07:46 PM  9 years agoPost 35
JohnDa

rrVeteran

England, South West

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Tony, to answer your earlier post, yes loctie was used and yes it was tightened correctly.

If it had of been a balancing issue i think it would of shaken the heli to pieces long before i had ran 25 litres through it, just one of those things that happens every now and again.

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04-21-2009 07:46 PM  9 years agoPost 36
Pinecone

rrKey Veteran

Maryalnd

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I use Loctite 290. Wicknig grade. Tighten, true, tighten ture, until you REALLY tighten it down. Then a drop of 290 at the junction of the nut and shaft to lock the nut on.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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04-21-2009 07:57 PM  9 years agoPost 37
Pulento

rrVeteran

CHILE

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Remove the hub/fan from the engine isn't the problem.

I meant that to try to remove the upper collet from the hub after REALLY tighten it and crushed against the crank threads its impossible not mentioning that a crushed and threaded upper collet possibly means not a perfect runout anymore.

Upper collet not lower collet

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HomeAircraftHelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Another vibe 50 in the air!
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