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08-11-2010 08:47 PM  8 years agoPost 21
Richardmid1

rrProfessor

Leeds, England

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Was this bearing flown using pinch or thumbs? Of course there are none of these rear engine problems with electric but I do like nitro!

I wonder which is better for the rear engine bearing, flybar or FBL? Futaba or JR?!

60% of the time, it works every time!

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08-11-2010 08:58 PM  8 years agoPost 22
scott222

rrNovice

Enterprise, Florida

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...

Scott

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08-11-2010 08:58 PM  8 years agoPost 23
jschenck

rrProfessor

La Vista, NE.

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? Of course there are none of these rear engine problems with electric
but I've seen a number of front motor bearings go out on electrics.

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08-11-2010 09:05 PM  8 years agoPost 24
scott222

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Enterprise, Florida

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Scott

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08-11-2010 09:09 PM  8 years agoPost 25
Aaron29

rrProfessor

USA

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Buy a new one, put it in, go fly. Spend a few bucks, replace it once a year. Spend a lot of bucks, replace it maybe every other year.
+1 It eats bearings.

That said, I still like the engine because it is tunable and has good power. But yeah, I don't expect much from the rear bearing and I always have a spare rear bearing on hand for when it goes out.
I posted this to bring to light once again another premature failure to a product with the intention that maybe something new has been developed that might bring some light to the situation.
Man I wish.

O.S.'s response (or lack of, I should say) to the whole Hyper rear bearing thing turned off a lot of people.

Honestly, I know you're upset, but I don't think dkshema's initial sarcasm was really pointed at you so much as the longstanding unresolved bearing issue that O.S. has never owned up to.

I too was flipping mad at one point. I have some old posts that can be a fun read if you care to peruse:

https://rc.runryder.com/t517090p1/?...t=hyper+bearing

I've gotten over all that now. Now I am in the "acceptance" phase of grief.

I've accepted that it eats bearings. It does suck, but I just can't get mad about it anymore due to the way people adjust to disappointment. Eventually you accept it.

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08-11-2010 09:11 PM  8 years agoPost 26
LonR

rrElite Veteran

Macomb,Mi

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Yup,electrics have bearing problems just like nitros and the shafts on electrics snap too.My 600E motor didn't last 20 flights and the bottom bearing was shot .

Get a good bearing for the Hyper 50,a Boca bearing will out last the piston ring..

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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08-11-2010 09:40 PM  8 years agoPost 27
scott222

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Enterprise, Florida

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Scott

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08-11-2010 09:44 PM  8 years agoPost 28
scott222

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Enterprise, Florida

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Scott

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08-12-2010 02:22 AM  8 years agoPost 29
GREYEAGLE

rrElite Veteran

Flat Land's

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Gosh I couldn't figure it out ??
Man Sorry : I just saw a fuzzy image of a rear bearing on a sheet of typing paper with what I thought were some fuel stains. Didn't read any description of a problem. It looks like all of mine.

What brand of bearing does TT use and what brand does OS use ?

KoYo, Fafner, SKF, TRW, Torrington, ?? Maybe they buy from the same supplier ? NK,- SK,- ROC, Japan ?

greyeagle

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08-12-2010 02:46 AM  8 years agoPost 30
jschenck

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La Vista, NE.

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I don't know if there is a brand difference but I know for a fact that the TT-50H, the TT-53RL and all the OS-50SX's use the same size bearings. I know this because I've replaced bearings in all those engines (and more). It's been my experience that bearings go bad because of moisture getting in and mixing with fuel and exhaust residue eating the metal. Crankshafts and bearings rust, doesn't take much rust to mess up the bearings.

I run them dry at the end of the day and store them with the throttle shut off and something stuck in the exhaust. Trying to prevent the engine from 'breathing' and getting condensation inside. Helps a lot that I can store them in the cool dry basement as opposed to the hot humid garage.

Electric motor bearings seem to be two factors: How hot the motor is running and how tight the pinion mesh is set. Hot running motors with a tight pinion mesh set will toast the bearings. Also if the motor shaft isn't perfectly straight that'll roast a bearing.

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08-12-2010 03:19 AM  8 years agoPost 31
Isaac F

rrKey Veteran

Panama Republic of Panama

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Hey Scott222, make sure to replace your OS Muffler Bearing when replacing the rear bearing.

Also, the best solution for that OS 50 Hyper is to use bushings intead of bearings

Isaac

Speed of light is greater than speed of sound. Some people seem very bright until U hear them speak

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08-12-2010 04:10 AM  8 years agoPost 32
Aaron29

rrProfessor

USA

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Also, the best solution for that OS 50 Hyper is to use bushings intead of bearings
Has anyone tried this?

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08-12-2010 05:25 AM  8 years agoPost 33
dkshema

rrMaster

Cedar Rapids, IA

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https://rc.runryder.com/p4964748/

No patience shown, and absolutely nothing constructive or informative in that post.

Enjoy that new bearing. But keep an eye (and ear on it) into the future. If you get lucky, you'll recognize the rattle before it goes. If you really get lucky, you'll experience a flameout or two that seem to be nothing more than a bad glow plug. But take a good close look at the plug's coil and see if you can find any tiny bits of metal stuck to it. Those would be bits of bearing races starting to go through your motor. The rattle, and the flameouts, if you know what they are trying to tell you, can ultimately save you from having to buy a whole new motor and/or heli.

-----

PS - no, not a beginner here. I didn't impugn your ability to fly, or question your integrity.

Me in 1974 -- Superbird modification to the DuBro Whirlybird 505,

and a bit later in 1982. Schluter MiniBoy.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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08-12-2010 10:23 AM  8 years agoPost 34
Richardmid1

rrProfessor

Leeds, England

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My rear O.S. bearings have always lasted quite a while and thats doing 3D at high head speeds, maybe I just dont fly enough but they certainly last long enough for me to not bat an eyelid in replacing them. They are not expensive and they are easy enough to do once you have done a couple.

BTW stainless steel bearings are not recommended because they are softer and get pitted easier.

60% of the time, it works every time!

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08-12-2010 02:47 PM  8 years agoPost 35
Aaron29

rrProfessor

USA

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Wow, '74!

Literally, you were flying helis when I was pooping my diapers.

As far as I'm concerned you are a heli god.

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