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HelicopterThunder TigerOther › Need advice on Rappy 50
01-02-2010 09:41 PM  7 years agoPost 1
wopwop

rrNovice

St Augustine, FL

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I am getting a worn bearing sound from the starter shaft on my Rappy 50. I tried removing the shaft and bearing by first removing the motor. I removed the set screw from the hex adapter on upper end of shaft, but the adapter would not come off. I loosened the screws on the side of the frame hoping the starter shaft would drop out - no luck. My question is what is the best way to get at the starter shaft bearing. Once the clutch is engaged with the motor running everything seems ok. When the motor is shut down and the main rotor spools down I can hear the bearing in the starter assembly. Any words of advice??

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01-02-2010 09:50 PM  7 years agoPost 2
TMoore

rrMaster

Cookeville, TN

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The shaft will come right out if you tap on it but the frames will have to be split if you want to change out the bearing.

TM

Delayed Response Operator Not Engaged

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01-02-2010 09:54 PM  7 years agoPost 3
wopwop

rrNovice

St Augustine, FL

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Thanks for your reply. Does the frame have to be split in half or can the screws be loosened so that the frame halves just barely separate from each other?

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01-02-2010 09:57 PM  7 years agoPost 4
rcjon

rrVeteran

Macon, GA

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You will have to completely seperate the frame halves, I think. Might as well replace the main bearings while you are at it.

Ask your doctor if your heart is healthy enough for Radio Control Helicoptering.

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01-02-2010 10:02 PM  7 years agoPost 5
wopwop

rrNovice

St Augustine, FL

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Thanks for the advice. I was hoping it would be a simpler project. You're right, once I open up the frames I will replace the bearing. Happy New Year!!

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01-02-2010 10:02 PM  7 years agoPost 6
jschenck

rrProfessor

La Vista, NE.

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http://www.raptortechnique.com/clutchbell.htm

but I will usually split the frame anyway. Pull the head off attached to the mainshaft, pull the tail assembly off and pull the radio/servo tray off all intact and it won't take much to put it back together again. This also lets you clean up the frame halves with some warm soapy water.

Change the rear bearing on your engine. I'd bet that's where the noise is coming from.

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01-03-2010 06:28 AM  7 years agoPost 7
bigdad390

rrVeteran

East. Liverpool, Ohio

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Change the rear bearing on your engine. I'd bet that's where the noise is coming from.
With the engine shut down, why would the engine rear bearing be making noise?

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01-03-2010 11:33 AM  7 years agoPost 8
Busher

rrKey Veteran

Manchester, England

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I have changed the bearings on my rappy without completely splitting the frames it is possible, however the extra time you take faffing about with bearing and frames trying to get the old bearing out and the new in, it is better to split the frames.

Good luck
Busher

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01-03-2010 03:57 PM  7 years agoPost 9
wopwop

rrNovice

St Augustine, FL

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I believe jschenk's comment about the engine rear bearing was referring to the one-way bearing that is integral to the clutch assembly mounted to the engine crank shaft. This bearing turns after the engine is shut down and the main rotor is spooling down. I believe this bearing would be easier to replace than the upper bearing captured by the two frame halves. Any comments?

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01-03-2010 03:58 PM  7 years agoPost 10
nemo

rrApprentice

tyler,tx

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I just had a rattle like noise on my heli and thought it to be starter bearing and finally found it to be rear engine bearing.

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01-03-2010 05:08 PM  7 years agoPost 11
jschenck

rrProfessor

La Vista, NE.

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sorry about that, didn't read the whole post. The other bearing that I've had problems with is the pinion bearing. The upper starter shaft bearing hasn't given me problems before. Still not a bad idea to check the engine bearing but if you hear the noise without the engine running than it's likely not the engine

Be sure and loctite (green loctite) the pinion bearing onto the pinion. it'll last a lot longer and not chew up the pinion.

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01-04-2010 07:21 PM  7 years agoPost 12
Swoop

rrElite Veteran

Newark, DE USA

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I would higly recommend upgrading to the SE Titan bell, pinion, and pinion block. It is a very nice upgrade that captures the pinion bearing securely without using the loctite on the pinion itself.

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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01-04-2010 08:19 PM  7 years agoPost 13
hornet dave

rrKey Veteran

Cedar Rapids, IA USA

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dial indicate your clutch to keep this from happening again

I'd tell you how to easily replace the bearing but every time I do that a bunch of internet keyboard pilots tell me i'm stupid. sorry but it's your loss as i don't care anymore.

I got a fever! The only prescription is MORE 6HV

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01-04-2010 09:12 PM  7 years agoPost 14
jschenck

rrProfessor

La Vista, NE.

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I would higly recommend upgrading to the SE Titan bell, pinion, and pinion block. It is a very nice upgrade that captures the pinion bearing securely without using the loctite on the pinion itself.
I agree, I put a pinion from one of my Vision kits (same design as the Titan SE) into my Titan. The only issue I had is the bearing boss didn't have the clearance for the nut on the pinion. I light amount of work on the frame with a Dremel sanding wheel and it works just fine. I think this will last a lot longer. May want to look at that before screwing the whole frame back together.

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01-06-2010 02:10 PM  7 years agoPost 15
wopwop

rrNovice

St Augustine, FL

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Problem solved on Rappy 50

If you remember my original post complained a worn bearing noice in the starter shaft assembly. I was dreading splitting the frame in half to access the upper bearing on the starter shaft. Well, I had a spare parts Rappy 30 heli and checked the part numbers for clutch and found the identical part number for the Rappy 50. So I replaced the clutch, which includes the one-way bearing, and voila - problem solved. No splitting of the frame! Made my day. Thanks for all the advice, guys.

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01-06-2010 05:28 PM  7 years agoPost 16
Swoop

rrElite Veteran

Newark, DE USA

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In the future you can replace the bearing with this
http://www.readyheli.com/HS1229_One...ng_p/hs1229.htm

It is an exact replacement and presses right in. Also check your start shaft where it fits in the bearing, often they wear just as much as the bearing itself

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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