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HelicopterEngines Plugs Mufflers Fuel › Bearing for OS max Hyper 50
10-23-2009 02:21 PM  8 years agoPost 1
ragusa63

rrNovice

athens greece

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Hi all,

In almost 4 months I ve changed twice the crank shaft bearing of my Hyper 50 Os engine. Can plz anyone tell me for wich reason in that short period of time those bearings are completely destroyed? Corosion? Bad quality of fuel? Humidity? I fly with 20% nitro Coolpower fuel and this engine is mounted in a T rex 600 Heli

Thx

Helis are forever.............

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10-23-2009 03:03 PM  8 years agoPost 2
Aaron29

rrProfessor

USA

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Can plz anyone tell me for wich reason in that short period of time those bearings are completely destroyed?
The 25,000 dollar question.

You'll get a lot of responses, none of which truly hit the nail on the head.

You'll get the corrosion response...yet when you do corrosion preventative measures, the bearings still go.

You'll get the bearing quality/type response...yet high speed, high strength, and ceramic bearings still fail with bad results.

You'll get the running too high speed response...yet when you back the speed down the bearings still fail.

You'll get the lean response...but no amount of tuning fixes it.

You'll get the bearing preload response...but no "coke can" or other mod will fix it.

You'll get the humidity response...but people in dry climates have the issue.

The only failure here is the Hyper. Do a search on each of those responses and you'll see when people have trouble they don't find the solution.

The Hyper 50 eats bearings. Many deny it, including OS. It is so well documented here, and my own experiences with the engine back this claim up. Somehow the 32, the 37, the 61 don't have this problem.

I'm convinced. When I've complained people blamed me, but all my engines are fine except the Hypers. You tell me.

My honest advice? Don't spend another cent on bearings for that 50. Sell it and get another motor. You'll spend more than the Hyper is worth during it's lifetime replacing the bearings. And it isn't just about the money, it's also principle, and avoiding the hassle of the frequent pulling of the engine.

Ask me how I know. I swear my oven sees more Hyper in it than food.

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10-23-2009 04:47 PM  8 years agoPost 3
flyingquisinart

rrApprentice

Detroit Area

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It comes up over and over. Since it seems to be with engine the most, I wonder what could be different..just throwing it out there...maybe has something to do with vibrations transmitted to the bearing on a certain frequency that seems to beat the bearings to death more on this motor than others. I have absolutely no knowledge or science to back it up..just a guess.

must have been a downdraft

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10-23-2009 05:09 PM  8 years agoPost 4
LonR

rrElite Veteran

Macomb,Mi

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I put a boca bearing in my old OS Hyper 50.Had a little over 30 gallons through it and still ran like day one.I sold that motor to bwerneth about 1 month ago and check in with him to see how its holding up and he said its running very strong for his flying (mild 3D,same way I fly) .Before I sold it I took the whole motor apart and the bearings didn't have any rust on them and were smooth as butter,see pics here http://runryder.com/helicopter/p4425966/ .Im running a Boca in my new Hyper with no bearing issues at all so it seems to hold up very good and I stopped counting the gallons haha..

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

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10-23-2009 05:13 PM  8 years agoPost 5
MartyH

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USA

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If they are new bearing and therefore no chance of corrosion, the biggest culprit is trying to extract too much power from the engine either in rpm or heat. I own 6 or more hypers and as of yet have never had to change a bearing. If you are banging on the engine trying to get the last little bit of power out of it, you'll continue to be frustrated. You should consider another engine such as the OS55 at that point.

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10-23-2009 08:06 PM  8 years agoPost 6
reddragon

rrElite Veteran

Brooklyn, N.Y.

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Ask me how I know. I swear my oven sees more Hyper in it than food.
Aaron this has to be one of the funniest things I've read on this forum!

Wayne - Fly it like you stole it! You're in good hands with Runryder!

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10-24-2009 01:21 AM  8 years agoPost 7
Aaron29

rrProfessor

USA

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I advise the original poster to do a search. Look at the discussions on "cures" for this engine.

Decide if you wish to work with the engine or sell it. You know my take on it.

I'm in this hobby to fly, not tinker with an engine all the time. My YS61 and OS32 never ate bearings at this rate. The Hyper eats bearings, plain and simple.

I'm not convinced it's trying to extract too much power. I run my YS 61 and OS 32 at peak power. The little things are screaming for mercy all the time. I was forced to run the Hyper, due to bearing troubles, at lower headspeeds and nice and rich. And still the Hyper bearings go first.

Corrosion is probably a viable claim. But what is it about the Hyper that this sets in so fast compared to others? I have three engines and the only ones I'm buying bearings for is the Hyper.

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10-24-2009 03:34 AM  8 years agoPost 8
BLUETHUNDER

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Glass City

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.......

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10-24-2009 05:36 AM  8 years agoPost 9
alanrw

rrNovice

Chatsworth, Calif.

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We had the same problem. We got replacement bearings from this place:

http://www.vxb.com/ballbearings.htm...FShGagodFUaVsg#

That was 2 years ago. I am still flying the same bearings I put in 2 years ago. We continue to fly the daylights out of our OS 50 Hypers. Evidently, OS likes to charge big money for poor bearings. We bought like 10 bearings for like $8 per bearing compared to the $30 per bearing OS charges.

alan

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10-24-2009 05:45 AM  8 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

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This particular topic seems to come up about as often as the "thumbs vs pinch" or "electric vs nitro" question.

There's nothing new in this post, and you won't get any different answers than have been posted about the Hyper rear bearing over the past few years.

-----
Dave

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

Team Heliproz

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10-24-2009 05:49 AM  8 years agoPost 11
Texmech

rrApprentice

Camden, N.C.

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Got a part number from that place ALANRW? I'll try any bearing once.

Good judgment comes from experience. Unfortunately, experience usually comes from bad judgment.

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10-24-2009 06:55 AM  8 years agoPost 12
LonR

rrElite Veteran

Macomb,Mi

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Oops,reading too fast LOL.

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

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10-24-2009 07:25 AM  8 years agoPost 13
nickt919

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New Orleans, Louisiana

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I guess I'm trying to extract too much power too....Thing is, my first OS50SX-H went 50+ gallons before the bearing needed changing. After getting into the Hyper50's my bearing issues started.
I used to pitch the bearings in the bin but lately I started to keep them as they go bad. The photo is just of the last year. I've been buying 2 at a time. Maybe I need to buy 10 or 20 to get a discount. I have 2 50 size helis. Now I'm not starting one unless I have no choice. The second heli sits as a back up and will only run if the first 50 goes down. Before I used to fly both. Changing bearings on two engines regularly is a PITA. I had two go bad at one time a few weeks back.

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10-24-2009 07:40 AM  8 years agoPost 14
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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We pay for the above-average power and tunability we enjoy with Hyper50's with extra vigilance towards their bearings. I have several, and some factory rear bearings have survived over 30 gallons while others haven't survived 5.

No regrets here. Enjoy the power and tunability? Then learn to do the bearing replacements cuz they'll always be required more than other similar engines.

It's a small-block engine with big-block power. This stresses rear bearings.

BTW the bearings from Boca aren't bad -- but IMO (and the opinions of many others) they're way overpriced. I buy mine here.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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10-24-2009 07:43 AM  8 years agoPost 15
Aaron29

rrProfessor

USA

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It's a small-block engine with big-block power.
Yeah, but 5 gallons? Come on how is that worth it for a little more power?

The next step down is the OS 37 which is what I'm going with until we discover how well the 55/56's run. I'm done with Hypers for good. Good riddance.

For now I'll be happy with small block power and reliability. Power isn't everything. You can do a lot of stunts with some good collective management. Collective management is probably not a bad thing to learn anyway.

Once the 55 has been out a while I'll check the reports. If there are hints as to reliability I'll be one of those few who didn't rush out to buy it. It's funny watching everyone drool over an engine that hasn't been released yet. It could be great, but it could be a total flop!

Although I have to thank all of them for being my beta tester.

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10-24-2009 07:50 AM  8 years agoPost 16
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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Power isn't everything.
All due respect, but that's an unpopular view when it comes to RC helis.

In small-block heli airframes the OS 50 Hyper can't (yet) be beat -- at least not until the newer larger displacement designs have been properly vetted.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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10-24-2009 07:51 AM  8 years agoPost 17
Aaron29

rrProfessor

USA

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All due respect, but that's an unpopular view when it comes to RC helis.
Don't get me wrong, I like power, but it has to come in a reliable package.

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10-24-2009 07:51 AM  8 years agoPost 18
nickt919

rrVeteran

New Orleans, Louisiana

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If the Hyper 50 is over powered the new 55 should pick up on bearings where the Hyper leaves off.

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10-24-2009 07:52 AM  8 years agoPost 19
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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I like power, but it has to come in a reliable package.
Agreed -- but once you've done it a few times, an OS 50 bearing R&R is less than a 1-hour operation -- a small price to pay for its output and tuna bility.

But I must admit that after 4 years I'm surprised at the differences in bearing reliability between one OS engine and another. I attribute it to manufacturing inconsistences -- so I just R&R 'em as needed without any further thought.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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10-24-2009 07:56 AM  8 years agoPost 20
nickt919

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New Orleans, Louisiana

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It's more of a pain to pull the engine out than change the bearing.

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HelicopterEngines Plugs Mufflers Fuel › Bearing for OS max Hyper 50
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