RunRyder RC
 7  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2731 views
Scorpion Power Scorpion Power
HelicopterEngines Plugs Mufflers Fuel › OS 50 Hyper - Bearings Annonmous Update
09-16-2007 10:24 AM  10 years agoPost 1
ChrisC

rrApprentice

Essex - UK

My Posts: All  Forum  Topic

Hi All

A Brief History

I have been a bearing killer on my OS50 Hyper since the engine was new. Bearings lasted around 1 gallon, regardless of the brand, original OS parts, Ceramic Stainless or cheap locally sources. I always run dry at the end of the day. I tried to idle a header tank of caster oil no nitro fuel at the end of the day. I tried the coke can mod, although I had shims made instead of cutting a coke can. I always used after run oil, and the heli is stored in the house. The heli is a Raptor 50 SE, which has always had the base plate fitted.

I have now had a set of bearings last 6 gallons, which may not sound a lot, but this is a 600% improvement, and they are still going strong, so what did I change. 1, I switched from 20% fuel to 30% fuel from the same brand. 2, I fitted the QuickUK Raptor 3rd bearing upgrade. 3, I fitted a head temp monitor, found that my head temp never exceeded 50C, so I leaned it to see 70-80C head temps.

So its either one, or a combination of all of these changes which has solved my problem. I am posting this as an FYI. If you have an extreme bearing habit like I did, then maybe you might like to try some or all of the above.

Chris....

PS time to change the signature.

Hooked on Align

PM  EMAIL  GALLERY  Attn:RR  Quote
09-16-2007 11:38 AM  10 years agoPost 2
tsokasn

rrApprentice

HELLAS

My Posts: All  Forum  Topic

Hello from me too.I also run a Hyper on my 50se.The mods i've made is the crank mod since motor's day one,QUK 3rd bearing and CP15% with 19% oil(i add the extra oil myself) The results,5 gallons so far of smooth running!!!

PM  EMAIL  Attn:RR  Quote
09-16-2007 11:58 AM  10 years agoPost 3
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

50C on the head is rather rich although one would think that this would lead to very long bearing life due to loads of lube. However, a rich engine may well be running rough which conceivably could result in premature bearing wear on the power stroke. 94C on the head is what you're looking for; backplate not so hot it is uncomfortable to keep your finger on. Bearing installation is often the culprit for poor bearing life although with a NEW engine, I've usually got close to 300 flights. Bearings seem to give up either at around 30 flights or 300, strange.
I've also tried all the engine mods at one time or another, but without any conclusive evidence that these effect bearing life.
Never had much luck with ceramics neither, these go bad quickly

PM  EMAIL  GALLERY  Attn:RR  Quote
09-16-2007 01:31 PM  10 years agoPost 4
ChopperEddie

rrVeteran

Pennsylvania, USA!

My Posts: All  Forum  Topic

I have a Hyper in my Titan. Just starting gallon number 6. So far, bearings looks great. I run Cool Power 30%ls (20% oil) and run dry after the last flight. No after run oil.

I must say, after reading all these bearing issue threads regarding the Hyper, I was very nervous about getting one for the Titan. Happy to report no issues as of yet, tho.

-- Runway? We don't need no stinking runway! --

PM  EMAIL  GALLERY  Attn:RR  Quote
12-23-2008 03:37 PM  8 years agoPost 5
paul999

rrApprentice

ilford essex

My Posts: All  Forum  Topic

hi

my bearing on my os hyper went after less than one gallon im dumping it and looking for a better engine that will last longer

PM  EMAIL  GALLERY  Attn:RR  Quote
12-23-2008 09:08 PM  8 years agoPost 6
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

""Bearings lasted around 1 gallon, regardless of the brand""

well I have to ask what brand and what prices did you pay for these bearings ??

I truly believe the "over all" problem with these bearing failures is they are junk bearings, people are going threw $6, $10 and $18 bearings left and right, back in 1980 a quality bearing in this size would cost around $8 but today a SKF in this size will cost you around $36 "as I know I bought 1",,

"then why is it some people don't have the problem ??",, well I am wondering if they are just lucky and got a bearing that was cut with a new cutter..

Oh, adding extra Castor didn't help my stock bearing last longer..

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
12-23-2008 09:14 PM  8 years agoPost 7
Rob Faust

rrApprentice

Spring, Tx

My Posts: All  Forum  Topic

For the first 6 or 7 months of this year, both of my O.S. 50 Hypers were eating bearings at an alarming rate. I purchased sets of bearings from Houston Bearing, and they have been doing fine for the last five months. I burn about a gallon a week.

The front bearing is made by PEER and the rear is made by BEARINGS LIMITED. Or at least those are the names on the outside of the packages. I will stick with this supplier for a while and see what happens. No plans to get rid of the Hypers.

PM  EMAIL  GALLERY  Attn:RR  Quote
12-23-2008 10:45 PM  8 years agoPost 8
Eagle2bravo

rrVeteran

Out flying somewhere

My Posts: All  Forum  Topic

Yeah... I too have had bearing issues. CY 30% on stock bearings lasted 2 gallons. 2nd set lasted 6 gallons. New stock set has lasted 5 gallons so far. I'm going to try Bearings limited or a another high end type. It's always the rear one that goes for me anyway.

T-rex 600n super pro , Trex 450 se, Gaui 200, Trex 500, Blade cx, . "If ya plant corn, ya get c

PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2008 10:16 PM  8 years agoPost 9
lightningrc

rrElite Veteran

UK

My Posts: All  Forum  Topic

Like I said in another post the OS bearings rear hyper 50 bearing are unbranded crap.
Its wrong they sell them in there nice OS packet and theres no name on the bearings.
Think im running SKF ones with a metal cage , easily done around 10 gallons since fitting it .
But I think if your not carefull you can go through rear bearings what ever the quality.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-24-2008 10:19 PM  8 years agoPost 10
Eagle2bravo

rrVeteran

Out flying somewhere

My Posts: All  Forum  Topic

Yep.. I agree....1 or 2 lean runs would do it.

T-rex 600n super pro , Trex 450 se, Gaui 200, Trex 500, Blade cx, . "If ya plant corn, ya get c

PM  EMAIL  GALLERY  Attn:RR  Quote
12-25-2008 11:50 AM  8 years agoPost 11
paul999

rrApprentice

ilford essex

My Posts: All  Forum  Topic

this seems to be a big problem with os 50 hyper i cant understand why os have not looked into the problem,i dont know of any other engines with same problems, put it this way ifit was the bearings in your car engine that went after every few gallons the manafacturer would soon get a lot of returned cars to fix every week and a lot of angry people,all my other os engines have been fine os32 and os 37, dont know what other engine route i will go but im not using my hyper anymore just to change berings after every weekend of good flying..... anyone want to by a hyper with less than one gallon though it but with dud bearing let me

regards
paul

PM  EMAIL  GALLERY  Attn:RR  Quote
12-25-2008 01:54 PM  8 years agoPost 12
lightningrc

rrElite Veteran

UK

My Posts: All  Forum  Topic

Yes your right all the other OS engines have always had branded bearings like the front one .

The 37 , 90s and aero engines etc , and the early hypers were branded then they must have found a cheap supplier buy one get a 100 free or some thing.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-27-2008 07:43 AM  8 years agoPost 13
kjiuo2

rrNovice

detroit, michigan

My Posts: All  Forum  Topic

just like any other manufacturers, OS would have multiple suppliers for any parts. Therefore, you are going to see difference in quality. The bottom line is what is the QA process in OS. How many sigma they allow?

PM  EMAIL  Attn:RR  Quote
12-28-2008 10:48 PM  8 years agoPost 14
pitfall

rrApprentice

england

My Posts: All  Forum  Topic

email

Guy's we all have the problem so dont we all email OS on the same day and very day after that, they should take some notice after all

PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2008 02:57 AM  8 years agoPost 15
tplummer

rrApprentice

Tomball, Tx USA

My Posts: All  Forum  Topic

Good Luck

This problem will never be resolved. If OS was going to make this right, it would have happened years ago. Nothing new here. The real interesting aspect of the problem is that the results seem to be random when buying other types of bearings. I've heard of folks buying an expensive brand X that may have worked, then another guy says that X is crap. The real solution is not to buy OS leaving you with TT which has it's share of problems. Like someone else said in this thread, if this were any other industry , the market would fix the problem (if possible)

PM  EMAIL  Attn:RR  Quote
12-29-2008 03:12 AM  8 years agoPost 16
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

I think what "tplummer" is trying to say is OS is just taking our money

and they are !!,,

believe me OS knows about the problem, after all they are the ones buying these bearings for less than $1 each,, if you look back at those new OS 50s that were posted some 6 months ago they had different bearings in them..

Jim
Buzz Buzz Buzz

PM  EMAIL  GALLERY  Attn:RR  Quote
12-30-2008 10:24 PM  8 years agoPost 17
lightningrc

rrElite Veteran

UK

My Posts: All  Forum  Topic

Also even though theres no hard facts that these unbranded rear bearings are not the quality of branded ones , Y are OS fitting them ?

It has to be a money saving thing on OS's side as im sure they know that the quality can not be trusted in a non branded bearing.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-30-2008 10:29 PM  8 years agoPost 18
lightningrc

rrElite Veteran

UK

My Posts: All  Forum  Topic

I would like to add though once you get the right bearings in them and treat them properally they are a really good reliable engine.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-31-2008 12:50 AM  8 years agoPost 19
utahbob

rrVeteran

St. George Utah

My Posts: All  Forum  Topic

os50 & bearings

I have to say in my 15 years in this hobby my os hyper has been the best motor I've had: I ran the stock rear brg. for over a year (I fly just about every weekend-3-4 flights) I believe the "crank Mod" helps with bearing life (that's the first thing I did to mine) also I learned from some oldtimers about what to do after a flying session to keep your rear brg. going! The by-product of burning this fuel is nitric-acid and if it's left coating the balls in the bearing; it will pit them which leads to failure; so after each flying session I turn my heli over and remove the back plate and then flush out the rear brg. with some raw fuel; and then drain it and blow it out with air (you don't need alot of pressure) next I put a drop of my own special after run oil mixture (marvel airtool oil & automatic transmission fluid mixed 50-50) on each ball and rotate the crank to make sure I get it evenly coated; then I turn it over and stick a paper towel in there to wick up the excess oil. I have tried all kinds of bearings in these engines using this technique and have had great results--sure it takes a few minutes but it's worth it--I usually rebuild my motors once a year and replace the bearings at that time but there's been a couple of rebuilds since I started doing this that I felt foolish replacing the bearing cause it looked too good! just be sure to replace your backplate in the proper oreintation!

I do a great decending funnel!

PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2008 03:46 AM  8 years agoPost 20
Eagle2bravo

rrVeteran

Out flying somewhere

My Posts: All  Forum  Topic

humm... interesting. I think I may try some of those things. Whats this crank mod everyones talking about?

T-rex 600n super pro , Trex 450 se, Gaui 200, Trex 500, Blade cx, . "If ya plant corn, ya get c

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2731 views
Scorpion Power Scorpion Power
HelicopterEngines Plugs Mufflers Fuel › OS 50 Hyper - Bearings Annonmous Update
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Saturday, November 18 - 2:48 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online