RunRyder - OS hyper50 New conrod

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 689 ONLINE 20 EVENTS SEARCH REGISTER START HERE

1 page

660 views

POST REPLY

Revolution Models	.	CarbonXtreme	.	Midland Helicopters
	.		.

Engines Plugs Mufflers Fuel > OS hyper50 New conrod

heli-kid
Heliman
Location: Abbotsford BC Canada

I don't know how I missed this one when I installed the fan and clutch. Just got this new from Tower about three weeks ago and since I now have 2.5 gal through it I wanted to see how the bearings were doing, So I opened it up and found that OS is now lightening the con-rods. This is the third Hyper 50 I have purchased in the last year and the only one that is different. What do you all think?

08-06-2008 02:37 AM

Eleven_Bravo
Senior Heliman
Location: Modesto,CA

OS had better change something people are getting sick and tired of checking their rear bearings very few freaking days or so then having to re dial the hub. I do not know what the new pretty (GAY) conrod will do for the longevity of the MAIN PROBLEM THE FREAKING REAR BEARING but OS needs to do something before they lose all of their customers.

Ok rant over please let us know if the bearing lasts longer in the motor with the new lightened con rod it is possible after years of not fixing the known problem and raking in all the cash it creates from motors killing themselves they realize that people are going to quit buying the trash and fly other motors that will last longer than a few gallons. I think I will just get away from the 50 class all together You don't hear of these problems in the 90 class or the 30 class.

Its not a maneuver until your looking down on it. ~Jason Krause~ Phoenix FF 08

08-06-2008 04:28 AM

heli-kid
Heliman
Location: Abbotsford BC Canada

The bearings went on the other two in about 5-6 gal. So I should have that much through it in a couple of weeks. I will post its progress.

08-06-2008 05:53 AM

dkshema
rrProfessor
Location: Cedar Rapids, IA

Quote
I think I will just get away from the 50 class all together You don't hear of these problems in the 90 class or the 30 class.

I just rebuilt an OS 91 C-Spec that I inherited to perk up my Freya. Among other things (piston, cylinder and ring that were fried), I replaced the rear bearing. Not because I just wanted to, but because it needed to be replaced.

As for the 30 class motors, my OS 37 SZ-H has been running a bit erratically of late. Last night I discovered that the piston, ring, and cylinder looked like someone had taken a file to them. Tonight, I took the rear bearing out. The inner race was shot, had three nice, deep pits in it, and the outer race was beginning to show some pitting.

And the reason I'm putting that C-Spec in my Freya? The OS 70 SZ-H recently ingested bits of its rear bearing.

Read with your eyes open, you'll be surprised how many rear bearings in other than OS 50's are dying. Perhaps the 50 goes through them a bit more often than the rest, but by golly, they all eventually will fail.

-----

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

Dave

08-06-2008 06:02 AM

the Wasp
rrProfessor
Location: Vt

hey OS,,

you know I wouldn't mind paying $10 more for a Hyper 50 if it came with a bearing that held up,, know what I mean,, get OS ??!!

Jim
Buzz Buzz Buzz

08-06-2008 06:03 AM

heli-kid
Heliman
Location: Abbotsford BC Canada

Today I went to a local barring supplier to pickup a new rear bearing for my second hyper50. I got a new high speed bearing made by (NACHI-FUJIKOSHI CORP)Japan it's rated for 26000 rpm.

Now the interesting thing is the rear bearings that come from OS are not marked we know that. The bearing in the front is usually marked on the shield NTN made in Japan. The NACHI Is also marked on the shield. Remove the shields so the oil can get to the bearing and now
you have an unmarked bearing. I

think the rear bearings that OS supplies are NTN. I think the real problem with the bearing is what I have read over and over on these forums, that the rear bearing is just not big enough.

08-06-2008 06:50 AM

dkshema
rrProfessor
Location: Cedar Rapids, IA

As for the new con rod design, it appears that OS has gone to a cast aluminum rod instead of continuing to use a rod that's machined from a block of solid aluminum.

Most likely it's a change driven to reduce the manufacturing costs of the motor (a casting with a few machined holes has to be cheaper than milling a complete part) and perhaps the cast version can be made faster and in greater quantity (in the same amount of time) than the equivalent machined part.

It works, it's an innocuous change, no problem.

-----

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

Dave

08-06-2008 12:53 PM

Eleven_Bravo
Senior Heliman
Location: Modesto,CA

Quote
Perhaps the 50 goes through them a bit more often than the rest, but by golly, they all eventually will fail.

This is my whole point they go through them alot faster than any 90 or 30 or 70 for that matter. I flew with a guy last year that flew 50 gallons or so through a N9 and a 600N. After going through two or three bearings he switched halfway thru the year to a YS 50 and it seemed to hold up a bit better. The N9 when he pulled it apart and decided it finally needed a bearing and a rebuild it was a year old an then it wasn't even that bad one small pit in the outer race. I think most of us would be jumping with joy if a hyper 50 rear bearing would last half that long. I know your right they all fail but I have come to the point that I take my hyper apart every month just to check the bearing its irritating to have to do this and have to re dial my fan hub every time. I have taken it apart so many times the screw heads are starting to get loose I am going to have to get new screws so they do not start stripping out.

Quote
you know I wouldn't mind paying $10 more for a Hyper 50 if it came with a bearing that held up,, know what I mean,, get OS ??!!

I agree totally I would not care if it was 20 bux more I would buy it in a second if it had a bearing that would hold up. DO YOU KNOW WHAT WE MEAN OS ARE YOU GETTING THE PICTURE HERE???? The hyper 50 is the easiest nitro engine I have ever tuned PERIOD and it does make great power when the rear bearing isn't feeding the rest of the motor a diet of metal. The picture is fix the hyper 50 rear bearing problem hell I don't care if it is a new OS 50 or 53 or 55. I do not care how OS does it but my point is they need to do something.

Its not a maneuver until your looking down on it. ~Jason Krause~ Phoenix FF 08

08-06-2008 01:34 PM

PilotDaz
Veteran
Location: Seattle, WA

I totally agree. The Hyper 50 bearing issue has cost me way too much and has become very exhausting.

30-50 flights is all they are good for. Disgusting.

Even had Hobby Services reject a warranty replacement on me. That engine (with only 50-60 flights on it) got flushed down the toilet because it was going to be too expensive to repair (internals all messed up from bearing debris)!

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"

08-06-2008 07:21 PM

Sam2b
Key Veteran
Location: Seattle, WA - USA

Give it up and buy a Thunder Tiger 53 Redline. I changed the rear bearing after 250 hard 3D flights. Yeah, I got my money's worth out of it alright. And the TT53 is more powerful, IMO. If you buy the TT53, be sure to install the dual carb linkages to avoid binding.

_Sam B_

08-06-2008 07:25 PM

HOMEPAGE

PilotDaz
Veteran
Location: Seattle, WA

I have indeed given up on the OS 50 Hyper. I just bought a YS .91 SR instead!

That'll fix my woes for sure!!!

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"

08-06-2008 07:29 PM

ckoelliker
Key Veteran
Location: St. Simons, GA

Quote
Even had Hobby Services reject a warranty replacement on me. That engine (with only 50-60 flights on it) got flushed down the toilet because it was going to be too expensive to repair (internals all messed up from bearing debris)!

Why did they reject the repair. I have sent two motors in, and the sent back a new one both times.

Anyway, I bought a new motor about a month ago, and I noticed the new con-rod. Maybe it is just a labor saving technique as described above.

08-06-2008 08:14 PM

PilotDaz
Veteran
Location: Seattle, WA

Quote
Why did they reject the repair. I have sent two motoras in, and the sent back a new one both times.

I've also sent in 2 and had 2 returned (brand new), but the 3rd was rejected because the bearing that was in the engine wasn't theirs. Theirs blew up after 30 flights and I replaced it with one from RC-bearings, and then that blew up after another 30-40 flights and ruined the engine.

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"

08-06-2008 08:36 PM

Eleven_Bravo
Senior Heliman
Location: Modesto,CA

Quote
Anyway, I bought a new motor about a month ago, and I noticed the new con-rod. Maybe it is just a labor saving technique as described above.

With OS I think we alll know it couldn't possibly be improvements so their customers will be happy, instead its just a change to save them more money so they make more money on the rear bearing bombs they sell us that they call engines.

I think it is obvious that I am fed up beyond belief I am sick and tired of manufacturers selling crap on purpose just to sell parts and get rich GREEDY BASTAGES

I guess it is good that I fly the Pantera 50 I have caught so much crap over that heli but I have never called the owner of the company and said I have a problem and get any response from him other than this is how we are going to fix that the parts are on the way free of charge. Another great note about the Pantera it has an option for a Big Block kit which allows me to get away from OS crap. Now their is a homeboy handmade gearing change for the Pantera so you can get the proper gear ratio with a 90 sized engine HELLO YS91SR. Yes I know I am going to have to change bearings but not every three EFFING gallons or so.

Its not a maneuver until your looking down on it. ~Jason Krause~ Phoenix FF 08

08-06-2008 08:42 PM

Sam2b
Key Veteran
Location: Seattle, WA - USA

90 class helis: Welcome to the world of 5 flights per gallon.

_Sam B_

08-06-2008 09:24 PM

HOMEPAGE

PilotDaz
Veteran
Location: Seattle, WA

Quote
90 class helis: Welcome to the world of 5 flights per gallon.

I thought long and hard about that, and decided that it will be well worth it when compared to the headache of dealing with faulty bearings every 20-30 flights.

Fuel.. fly.. repeat!

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"

08-07-2008 06:33 AM

Inspector Fuzz
Veteran
Location: Austin, TX. Where fat chicks succeed.

Extending bearing life.

As of late, I have returned to an old trick for extending bearing life.
I add an ounce of pure castor oil to each gallon of fuel. The residue on the muffler and head are minimal.
The castor makes the bearing last twice as long. It still goes, but you get about twice the life just for adding that ounce.
Most of my failures were due to corrosion.

Argue for your limitations and sure enough, they're yours

08-07-2008 06:43 AM

J Kofoed
Senior Heliman
Location: Denmark

Just by a West 50H and you do not have bearings issue.

08-07-2008 10:32 PM

HOMEPAGE

the Wasp
rrProfessor
Location: Vt

therefor a Webra, my next engine