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HomeAircraftHelicopterMiniature Aircraft Whiplash & Fury 55 › bottom mainshaft bearing block keeps moving
05-29-2012 06:47 AM  6 years agoPost 1
1tonv

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Pontiac, michigan. U.S.A.

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i cant keep (up & down) play out of mainshaft? after 6-8 flights the bottom bearing block gets pushed down, and i have slop in mainshaft. ive tightened the 4 screws in the block to the point of stripping and it still moves. i also noticed a little wearing, or mushrooming to the top of maingear hub where it meets middle mainshaft bearing. any ideas? im running the blue dampners, wich i lubed them really good, is my head too stiff? i love the snap this machine has, but wondering why im having this problem.i would really hate to soften the head and lose some snap as ive gotten used to to pop.

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05-29-2012 07:47 AM  6 years agoPost 2
The man

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at home

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Could it be the screw holes are not deep enough and you are bottoming the screws. Try grinding the screws a little and see if it helps.

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05-29-2012 10:17 AM  6 years agoPost 3
wrongler

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Brewerton, New York

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Maybe try the red loctite.

Bill Whittaker

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05-29-2012 01:40 PM  6 years agoPost 4
geomecc

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Long Island ,NY

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what model is this on? maybe you can turn the block upside down so the bearing goes in from the top. if the whole block itself is moving then use washers on the bolts that secure it.

R I P Roman Jr. Team SKOOKUM SRW EFC

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05-29-2012 02:28 PM  6 years agoPost 5
MinAirUSA

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Bavaria, Germany

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An easy fix for this is to use MA0865-7 shim on the top and bottom of the main gear hub.

This has been addressed in the newest kits.

Mike

Miniature Aircraft

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05-29-2012 08:44 PM  6 years agoPost 6
helipulse

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Toronto, ON, CANADA

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I am having the same exact problem. What was the solution?

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05-29-2012 08:49 PM  6 years agoPost 7
wrongler

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Brewerton, New York

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Minair, why not post the solution?

Bill Whittaker

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05-30-2012 06:17 AM  6 years agoPost 8
Kelly Fairbanks

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Twin Falls Idaho

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I simply put larger washers so that it has more side frame to hold the screws seems to work !!

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05-31-2012 11:31 PM  6 years agoPost 9
philip 01

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ft worth

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the bearing isn't moving. the hub is eating into the bearings. use a shim on either side of the hub and all will be good.

at least that fixed it down here on 3 whiplash's...

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06-01-2012 03:18 AM  6 years agoPost 10
1tonv

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Pontiac, michigan. U.S.A.

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Yes I have shims on the way plus new style hub with thicker flanges

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06-01-2012 02:20 PM  6 years agoPost 11
helipulse

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Toronto, ON, CANADA

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New style Hub?

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06-01-2012 05:49 PM  6 years agoPost 12
laddy

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Midland Texas

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Yea what new style hubs??

Texas

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06-01-2012 06:01 PM  6 years agoPost 13
1tonv

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Pontiac, michigan. U.S.A.

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I spoke with Chris lund and when him & bobby first designed it they were using different bearings. They didn't have a big chanferred edge on inner reece. That edge is what is eating up the hubs but if u put spacers on top&bottom it shuts the edge off. I guess the new designed hub has larger flanges on top&bottom. Sorry about spelling hopefully u guys can understand what I'm trying to explain.If u guys have questions just call miniature THEY STILL HAVE THE BEST SUPPORT IN THE BUSINESS!!!!!!!!!Chris was more then helpful

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06-01-2012 06:37 PM  6 years agoPost 14
robv

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SoCal

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As Mike had posted above, you guys can use MA0865-7 shims for an easy and quick fix. Also, if your LHS supports HPI parts, can use HPI part number Z892. They are .2mm shims and come in a pack of 10 or so. Works fine.

Team JR | Gens Ace | YS Engines | Scorpion Motors | Pure Tech

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