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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › OS50 HYPER w/RUSTY BEARING
02-04-2008 08:53 PM  10 years agoPost 21
Sam2b

rrElite Veteran

Tacoma, WA

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Can someone advise what I can do???? Pls help.
Sorry to snickering a little, but yeah: you must replace the bearing. It just the cost of the hobby. And it is worth to inspect your engine about every 50 flights or so, or when ever you suspect something may be wrong internally.

Don't let your rear bearing go without replacement too long or the piston rod could actually start chaffing the engine block, and cause nasty sights like this:

_Sam B_

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02-04-2008 09:26 PM  10 years agoPost 22
flyingquisinart

rrApprentice

Detroit Area

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It's really strange about rust. I don't get to fly very often and I've let my hyper sit w/out after run oil for weeks at a time. I just run the engine at a fast idle until it runs out of fuel, or pinch the line to run it dry. Never have had a lick of rust in 2 years. My saito 4 stroke I've treated the same way with about the same "down time" and all the internals look like they've been sitting in the rain for a year-That's about $250 down the toilet after 1 flying season.

I'm really wondering if there are batches of bad steel, rather than what we've done right or wrong as modelers. Clearly how we maintain our stuff makes a big difference, but when you read some of the really 'bad luck' it makes me wonder.

must have been a downdraft

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02-04-2008 10:57 PM  10 years agoPost 23
michael88997

rrElite Veteran

Lewisville,Tx

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engines are just unpredictable because ive shut my hyper down before just using the trim(not running it dry expecting to fly again) and i didn't and let it sit for 3 weeks several times and no rust formed

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02-04-2008 11:03 PM  10 years agoPost 24
bagobitz

rrVeteran

saddleworth,lancs,UK

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first, you cannot blame OS for the bearings...they did NOT make them!

bearing-manufacture is highly specialised, the vast majority of sizes and types are standardised...EG a "6202" will be the same, no matter what box or maker's name is engraved on it.

The suffix (es) denote seal/seals, and the TYPE of seal...so a 6202 zz will be the same, dimensionally, the world over

The only other thing to be aware of, is the TOLERANCE of the bearing-fit and finish...this is usually an"abec" number (higher number=more precise bearing)

Stainless steel and Ceramic bearings are also available,but it's likely that durability, load and speed-rating are compromised, compared with standard hardened chrome-steel construction.

It's my opinion that the biggest rust-issue is AMBIENT HUMIDITY.

if the bearing is in a warm, dry envirionment , it won't rust.

Even if there's residual fuel, it will just evaporate, leaving it's oil -content behind...moisture is as a result of condensation (fuel evaporating chills the engine-internals, as air temperature falls, so does it's ability to hold moisture...therefore chilled air is likely to precipitate it's moisture-content inside the engine,thus rusting the bearings.

so, warm'n dry, helps you fly!

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02-04-2008 11:10 PM  10 years agoPost 25
michael88997

rrElite Veteran

Lewisville,Tx

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so, warm'n dry, helps you fly!
thats why i keep my heli in the house... does the fuel still evaporate if the system is completely closed off? ive never understood that, because i plug up the exhaust port and if the carb ends up closed when i store it then were does it evaporate to?

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02-05-2008 01:46 AM  10 years agoPost 26
GMPheli

rrElite Veteran

W. Bridgewater, MA USA

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I don't own one of these, but looking at the pic from the first post it seems to me that OS could have fit a much larger rear bearing in that case. It may just be the angle because the pic is not shot from straight on. I know that OS had some rear bearing issues with some of their older 60's and went to a bigger rear bearing. Check out these pics. The smaller bearing is in an OS61RFH, and the bigger is in an OS61SFH.

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02-05-2008 01:53 AM  10 years agoPost 27
harrier8131

rrNovice

hong kong

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Dear helibird, heliman and so on for all your valuable input.
To think of it, for the last 15 flight with this new engine, there has been quite a un-known noise emitted from my heli. Just dont know where it comes from. Now i know where, is from the engine. SIGH

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02-05-2008 02:04 AM  10 years agoPost 28
michael88997

rrElite Veteran

Lewisville,Tx

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theres a good rule to go by... if you start your heli and theres a different noise than last time you flew it theres something wrong

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02-05-2008 02:24 AM  10 years agoPost 29
harrier8131

rrNovice

hong kong

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yup, fully agree with you
but i just learn the hardway i guess
SIGH, darn OS-Engine COMPANY for selling me not up to standard engine 50Hyper with rusty bearing inside

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02-05-2008 02:26 AM  10 years agoPost 30
dkshema

rrMaster

Cedar Rapids, IA

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FWIW -- rear bearing problems in the OS 50 SX-H are well documented. I could say "do a search", but there are hundreds of posts about the bearing.

No, having a rear bearing in an OS 50 go bad after a short time is not unusual, my first one lasted for something like three tanks. I've run a 50 SX-H and a 50 Hyper for quite a few years now. Each one goes through at least one rear bearing a year.

I know it's not what you wanted to hear, but that's life. In the US, the OS warranty is two years. If you send them the motor, a dated sales receipt showing that the motor is less than two years old, wait a week or so, you get your motor back, good as new, and it costs only shipping. Outside the US, I don't know what the warranty is. Check it out, it may be worth your while.

-----
Dave

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

Team Heliproz

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02-05-2008 02:34 AM  10 years agoPost 31
michael88997

rrElite Veteran

Lewisville,Tx

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but doesnt the warrenty cover if something is defective... if there is sign of damage in the engine because it ran 15 flights with a bad rear bearing they probably will say user fault... but yea check into the warrenty before u buy anything

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02-05-2008 02:50 AM  10 years agoPost 32
ThunderRobo

rrKey Veteran

Toronto, Canada

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When you have a can of coke that has been sitting on the shelf for 10 years, where does all the CO2 go? the coke tastes flat

Derek
Da' kid with the toyz!
"Time for some Muzak!"

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02-05-2008 02:57 AM  10 years agoPost 33
dkshema

rrMaster

Cedar Rapids, IA

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Hobby Services here in the states is pretty good about honoring the two-year warranty period, no matter what happened to the motor. Repairs caused by rear-bearing failure are not new to them. If the rear bearing died while running, most likely they'll replace the motor or fix it good as new, for the cost of shipping.

I've sent them three different OS32 SX-H motors over the years, all whose con rod exploded in flight, one was actually a week out of warranty. All three were repaired at no cost to me, other than shipping. One of them went back three times for the same problem.

An OS50 SX-H of mine that went through a funky chicken dance in a plowed cornfield, and in addition to dirt, ingested most of my clutch lining and metal bell from my EVO 50 -- sent back to Hobby Services, along with a note about what happened. They sold me a new in the box 50 SX-H for $100, well below retail, as replacing just about everything but the crankcase and head would have cost much more.

-----

I don't know what the out of states warranty is, or who does the work, but give it a shot.

-----
Dave

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

Team Heliproz

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02-05-2008 03:59 AM  10 years agoPost 34
harrier8131

rrNovice

hong kong

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Dear dykshema
I already asked the shop about the warranty. NO they dont do it, they just ask me to contact OS-engine.co.jp, for the warranty/defect
So I did, but it seems it fell on deaf ears. According to alot of hobbyist, it seems os-engine.co.jp DO NOT entertain. I know what u going to say, WHAT A COMPANY !!!

If only every hobbyist can boycott their product, then they would notice the power of consumer/end-user.

Out of curiousity, can I sent my engine to the above mention hobby shop to make a claim??? Pls advice, TQ/cheers

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02-05-2008 04:04 AM  10 years agoPost 35
ThunderRobo

rrKey Veteran

Toronto, Canada

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Due to the nature of this hobby, you cant expect a company to repair every single thing that goes wrong.

Sorry to say, but i would have no idea why OS should be held responsible for this. Used is just what it is, USED.

Derek
Da' kid with the toyz!
"Time for some Muzak!"

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02-05-2008 04:06 AM  10 years agoPost 36
michael88997

rrElite Veteran

Lewisville,Tx

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well its one thing if you had got it and noticed and sent it back but since the damage it caused by flying 15 flights with a bad bearing they arn't just going to send you a new engine.... thats like trying to sew a tire company because you drove around without filling it up with air and it blew up... you would have to call them or e-mail them and ask about their policy with dealing with out of country stuff before sending the engine

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02-05-2008 05:19 AM  10 years agoPost 37
dkshema

rrMaster

Cedar Rapids, IA

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If only every hobbyist can boycott their product, then they would notice the power of consumer/end-user.
But not every hobbyist NEEDS or WANTS to boycott the product. I have no problem with their products OR their service. I've flown OS motors dating way back to the late 1960s in control line planes, later in RC planes, and now RC helis. The few problems I've had with OS over the years have ALWAYS been satisfactorily handled by Hobby Services.

Thousands of other OS users in the states are quite happy with their products (even if the 50 eats rear bearings for lunch).

What you're seeing is not a universal problem with OS. It sounds to me as if the problem is with whom you bought the motor from, not from OS.

I missed it the first time I read through this thread, but you included this statement in a subsequent post:
To those who intend to buy OS engine / Align engine
which leads to the obvious question. Is this an OS 50 Hyper, or an Align 50 Hyper? If it's an Align 50 -- should your complaint be with Align instead?

If an Align version, did it come out of the same factory/warehouse as the average every day OS 50 Hyper? If it's an Align motor, does OS have ANY responsibility here at all?

-----

Sorry you had trouble, but I think it's a hard sell to convince the modeling world that OS engines are junk and that OS is unresponsive.

-----
Dave

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

Team Heliproz

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02-05-2008 07:51 AM  10 years agoPost 38
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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Sorry you had trouble, but I think it's a hard sell to convince the modeling world that OS engines are junk and that OS is unresponsive.
An understatement. They have an excellent rep in RC modeling and will continue to regardless of the outcome of your issue. I feel it's in somewhat bad form for you to imagine the whole world of RC will boycott a company with such a great reputation just because of one bad set of bearings.

I'll suggest you try a little harder to find someone at OS or Align (if that's the nameplate on it) to convince to warranty your one bad engine.

Did that engine ever get hot, even briefly?

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

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02-05-2008 11:59 AM  10 years agoPost 39
bagobitz

rrVeteran

saddleworth,lancs,UK

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Michael,
does the fuel still evaporate if the system is completely closed off? ive never understood that, because i plug up the exhaust port and if the carb ends up closed when i store it then were does it evaporate to?
Yes, it will, the carburettor and piston are NOT 100% gas-tight. In a warm room, the volatile fuel will evaporate and the vapours will escape into the room (if it gets cold again, te vapours condense and the cold room-air will get drawn in to equalise pressure...IF that air is moist, you'll get water condensing- out INSIDE the engine...hence the rusty bearings.

HARRIER, see above, It could well have been the engine was stored badly between leaving the factory and the bearing failing...I repeat, OS do NOT make bearings....your old bearing should have full identification on the edge of the outer -race.

DEREK,
When you have a can of coke that has been sitting on the shelf for 10 years, where does all the CO2 go? the coke tastes flat

Derek
I'd guess the molecule-size of CO2 is small enough that it can migrate through the aluminium of the can.

Certain industrial gases have a "use by" date for the same reason!-Yes! those big iron cylinders are porous!

the metallised foil helium balloons go soggy for the same reason...they can be perfectly filled and sealed but will still lose the Helium.

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02-05-2008 03:47 PM  10 years agoPost 40
national

rrNovice

Lebanon

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In the 50 size heli engine, the os has one of the best power
and is reliable. I understand the rust issue is bad, but it isnt
that bad if you consider the good power output every pilot likes to
have. Another question to be asked is that why other os engines do
not have rust issues like this one???

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