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HomeAircraftHelicopterThunder TigerRAPTOR 50 › hyper 50 rear bearing
02-06-2008 02:34 AM  10 years agoPost 1
shawn70079

rrApprentice

norco

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What is the deal with the rear bearing and if there is a problem were can I get better one to replace it before it really cost me ?

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02-06-2008 03:17 AM  10 years agoPost 2
jschenck

rrProfessor

La Vista, NE.

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very well documented problem with rear bearing failures. You end up getting good at replacing rear bearings

5 year old thread on the subject:

http://runryder.com/t48761p1/

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02-06-2008 03:21 AM  10 years agoPost 3
jschenck

rrProfessor

La Vista, NE.

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and the famous coke can mod

http://runryder.com/t120174p1

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02-06-2008 03:27 AM  10 years agoPost 4
shawn70079

rrApprentice

norco

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bearing
do they make a upgraded bearing ? and if they do were can i buy it ?

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02-06-2008 03:43 AM  10 years agoPost 5
jschenck

rrProfessor

La Vista, NE.

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I don't bother with 'upgraded' bearings. the $7 set works great

go figure, OS-50 bearings are the number one seller on rc-bearings.com

http://www.mcintoshcentral.com/rc-b...f14e1d00bf77f55

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02-06-2008 03:50 AM  10 years agoPost 6
shawn70079

rrApprentice

norco

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hey
my os is stillpretty new I just did not want to one day have engine failure while in flite

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02-06-2008 04:18 AM  10 years agoPost 7
jschenck

rrProfessor

La Vista, NE.

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At the end of the day I spin my engines with a glow lighter attached for about 5 seconds after the last fuel induced kick. I don't have bearing problems for the whole season. It's my opinion that one of the leading causes of bearing failure is raw fuel mixed with nitric acid and moisture from storage. Run the fuel out of the engine and store it with a plug in the exhaust.

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02-06-2008 03:51 PM  10 years agoPost 8
BarracudaHockey

rrMaster

Jacksonville FL

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The "upgraded" ceramic bearings will go just as fast as the cheap ones, some go fast, some last cases of fuel, it all depends. The coke can mod and the crank web mod do the same thing, modded engines eating bearings.

Andy
AMA 77227
http://www.jaxrc.com

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02-07-2008 12:56 AM  10 years agoPost 9
BJames111

rrElite Veteran

San Diego, California

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It's weird, last year I went thru 4 rear bearings in my Hyper, and this year, not one yet. (different engine). I did the web mod on the first engine after I went thru the 4 bearings. It seemed smoother, but I suspect it was just due to the new bearings. I sold the machine about a month later so I never did find out if the mod helped or not...

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02-07-2008 01:14 AM  10 years agoPost 10
Billebob

rrVeteran

Tim-buck-2

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hello Brian,

One of the problems I've experienced with the OS Hyper that affects bearings is the line boring tolerance for the front and rear bearing. If this is off then the bearings will have a misalignment during rotation. You'll see it when you rotate the crankshaft with the fan tightened down and the connecting rod and piston removed. There will be a spot where the rotation gets a bit tighter. It's minor enough that with the engine assembled compression and piston drag will mask it. I'm not saying this is your problem but it is a theory worth considering.

BB

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02-07-2008 11:34 AM  10 years agoPost 11
ChrisC

rrApprentice

Essex - UK

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My hyper is just over 2 years old, the 1st year I could not get the bearings to last more than 1 gallon. I tried the lot, last year however the bearings have lasted 10 gallons at least.

What I changed is listed below, but what solved the problem I don't know.

1, Changed from 20% to 30% fuel (same brand)
2, Monitored the engine temp with a on-board monitor, found it to be low, so leaned it to a Max of 80C in flight.
3, Fitted a 3rd bearing upgrade to the Raptor.

Hope this helps

Chris.

Hooked on Align

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02-07-2008 01:25 PM  10 years agoPost 12
Dino Spadaccini

rrElite Veteran

USA

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bearings
Just buy a redline TT 53 with a 3year warranty,

just had too

RIP Roman JR
Capt USA Align Factory Team Align - Conquer Your heart
Team Futaba

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02-07-2008 03:33 PM  10 years agoPost 13
HammerTm2

rrNovice

San Diego, Ca

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OS 50 Hyper
I have a new OS 50 Hyper and have been chasing a noise when I crank it with the starter. I first thought it was a loose clutch or fan but when I disassembled it was ok. The shaft run out was good and I could not find any fan scraping marks. Is this the first indication the rear bearing is bad.

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02-07-2008 03:37 PM  10 years agoPost 14
HammerTm2

rrNovice

San Diego, Ca

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TT 53 Redline
I am not sure of the TT engines. My TT 39 Pro was kind of sad, lacked power and wore out pretty quick. Is the quality and craftsmanship on the new TT 53 Redline better than the TT 39 Pro.

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02-07-2008 03:50 PM  10 years agoPost 15
jschenck

rrProfessor

La Vista, NE.

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Is this the first indication the rear bearing is bad.
yes! first time I heard the rear bearing going out I assumed it was my clutch bearing also - next flight 1/2 a ball bearing came out and wedged itself between the piston and cyl. - first silent auto and it was nose in (non-driven tail)!

btw, read up on the TT-53, I haven't read anything bad about the redline, 'course it just got released.

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02-07-2008 03:55 PM  10 years agoPost 16
HammerTm2

rrNovice

San Diego, Ca

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jschenck
My OS 50 Hyper was a new install and on the first crank I herd the noise. It’s not even broke in yet. I guess I need to haul it back out and replace the rear bearing.

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02-08-2008 12:14 AM  10 years agoPost 17
BJames111

rrElite Veteran

San Diego, California

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Dino! You've been pinked!!!

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02-09-2008 12:03 AM  10 years agoPost 18
Dino Spadaccini

rrElite Veteran

USA

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hehe
I guess some one couldn’t take a joke oh well it’s my first ever

its ok no big deal

RIP Roman JR
Capt USA Align Factory Team Align - Conquer Your heart
Team Futaba

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02-09-2008 12:35 AM  10 years agoPost 19
Qrrambero

rrKey Veteran

San Francisco / Bay Area

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Dino is out of the dog house.
Clear color. Way to goooooo

Ae

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