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Midland Helicopters . HeliProz . ZoomsHobbies

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Engines Plugs Mufflers Fuel > So OS50 is a piece of crap!
 
 
Kino
Veteran
Location: Navan, Ireland

Well I did an extensive search of runryder and the verdict is that the OS50 is a piece of crap!
Or is it,
It's by far the most talked about 50 class engine (moaned about)so why do you guys keep buying them and is there a better option.

Why do we fear change, one of the two certainty's in life
08-17-2003 Over year old.
 
 
the Wasp
rrProfessor
Location: Vt

MMMmmmm,,,, well,,, I love my OS 50 !! it's the stock carb I had a problem with, but as you most likely know from you research I fixed that problem with an OS 61WC carb (60B), yes it was an expensive fix but it worked out very well !!,,, I had only 1 problem with the stock carb, after flying around, and then I bring it in to a hover my motor would go lean quite a bit, bad enough to make me wonder if my motor was being damaged, now my friend has had an OS 50 (100% stock) longer than I have owned mine, and his does not go lean,,, go figure...

mmmmm could it be, I have always burned 15% and my friend burns 30%

alternative,,,
Nova Rossi 50,,, I want one...


Jim

Jim
Buzz Buzz Buzz
08-17-2003 Over year old.
 
 
thierry
Senior Heliman
Location: Paris FRANCE

os 50

i am very happy with my os 50
i have a 60 b carburator
muscle pipe 1
quick uk alu fan
600 mm razor blade
1950 rpm on rotor or 16575 rpm for engine ,
9 mn of fligth with 300 cc
and the engine is still at low temperature
even now in france with air temperature closed to 35 ° c

very powerfull
my raptor 50 v2 is a rocket
08-17-2003 Over year old.
 
 
LUNITIC
Senior Heliman
Location: Chesapeake, VA

Neither Here nor There

I just recently bought and installed an OS 50 with stock carb. At this point i'm sort of un-decided. I used to have an Webra 52 AAR on my bird...It off to Austria for repairs.

Okay, that being said, I'm not impressed with the power yet but I am impressed with the simplicity of set-up, where the Webra was a nightmare to get figured out. I'm still in the break-in phase. I think the Webra just have more power than the OS and regulates a whole lot better but once that engine breaks well it's down hill from there. I'm thinking of putting my OS on a pipe, possibly a Hatori, I like the effiency of a tuned pipe and the power.

As far as a piece of Crap, I don't think so and the alternative is; Webra, TT50, Euro 50, IMZ50, Enya 50, OS 46 and unfortunitly no YS 50 I'm sure I missed some, however, if you search around you will find the same complaints about these engines in some way form. My theory, when you buy an engine 9/10 of the problems you experience is with setup and understanding. The other 1/10 of the problems is with manufacturing defects that can contribute to those NIGHTMARES! For every person here on RunRyder that's not happy with their engine, there's someone that is and plenty that's key board shy and affraid of the ole pissing contest. I've seen bad OS 50s and the main problem have been; Bearings going bad, broken crank shaft, bad ring, bronken con-rod, and a bunch of Carb problems. I know for a fact that most of these problems were cause by some form of bad setup, usually running too lean or way too rich. I've seen people bring these engines into the shop and when you talk to them you can't really blame the manufacturer because Joe Shmo was out doing something stupid like cleaning the engine after a few gallons with a harsh degreaser which stips the inside of the engine...where all the pits and stratches were filled during the break-in period. Okay, I think I said enough, my two cents.

Tim Richburg Chesapeake,VA
08-17-2003 Over year old.
 
 
capebob
Veteran
Location: Cape Coral, FL

My experience with the OS 50 has been rather mixed. It has lots of power, starts easily and idles well. The down side is really excessive fuel consumption and a really low quality rear bearing. My rear bearing developed excessive slop after only moderate use. My engine sounded like a coffee can full of rocks rolling down a San Francisco hill. The bearing has since been replaced with a ceramic one but I have not put it back into service yet. I replaced my OS with a TT 50 and my flight time has increased from eight minutes to nearly sixteen. I know that's hard to believe but it's true. The TT 50 has a lot of power as no curve adjustments were required, but it remains to be seen how well it holds up over time.

Bob

Success is the ability to go from one failure to another with no loss of enthusiasm. Churchill
08-17-2003 Over year old.
HOMEPAGE  
 
 
LUNITIC
Senior Heliman
Location: Chesapeake, VA

Hey CapeBob

Hey dude, I agree with you hole heartly about the TT50. I owned a couple of them and regretted seeing them go with the birds I sold. I thought about buying another one but thought to try the OS 50 instead. I've seen those rear-bearing issues with the OS 50 and you would think that they would just fix this, must be some brother-in-law thing I guess. I'm probably gonna invest in some ceramic bearing as a premeasure to what could happen. I just hope I don't develop those nasty carb problems I've been hearing so much about.

Tim Richburg Chesapeake,VA
08-17-2003 Over year old.
 
 
vetrider
Elite Veteran
Location: Daleville, AL (Ft.Rucker)

You know Kino ....

when you out sell your compeditors by 25 to one your going to have 50 to one complaints.

It's just the way of the jungle.

Nolan Manley
RREMODELS, KBDD, Magnum Fuel
Stratus, ODIN, K3D, ATOM500, Outrage550, 700N, Vibe.
08-17-2003 Over year old.
 
 
michaelmillikin
Senior Heliman
Location: Granite Falls NC USA

nolan

great point!!!!

my os50 is great ,,, but i also run 30% nitro--20-24% oil content also
the os 32 i had loved the fuel also.

and haven't had probs with the carb/syndrome going around
08-17-2003 Over year old.
 
 
Doug
Elite Veteran
Location: Naples Florida....

With the 60B carb the run time increases to 16 min and with uniflow is consistent throughout the tank. Cutting the web away on the crank improves balance and stops the rear bearing from "Swimming" in oil and skidding, leading to early failure.

First member of Member of Bearings Anonymous
08-17-2003 Over year old.
 
 
Doug
Elite Veteran
Location: Naples Florida....

I am convinced that "all" will fail and the "longevity" will vary but the "bell" curve will center around 7 gal or so. I think the "stock" bearing is adequate and sized correctly. I think the "oiling" scheme (hole in the crank fwd of the bearing and drain hole in the crank pin) is the problem. I am convinced that oil gets trapped in the bearing and in the lightly loaded quadrants (remember no thrust to load up the bearing) allows skidding which leads to spalling which is the "root" cause. Remove the web on the crank and I think any bearing will last.

First member of Member of Bearings Anonymous
08-19-2003 Over year old.
 
 
Doug
Elite Veteran
Location: Naples Florida....

Bench grinder but be carefull not to "touch" the shaft. A dremmel with a 1/2" sanding drum (100 grit) works good but takes some time one web=one drum

First member of Member of Bearings Anonymous
08-19-2003 Over year old.
 
 
Raffy
Key Veteran
Location: Chicago, Illinois

Quote 
OS50 is a piece of crap!

Maybe mine is Special, it runs great!
08-19-2003 Over year old.
 
 
Kino
Veteran
Location: Navan, Ireland

Can I see a picture of this web?
And who sells ceramic bearings?

Why do we fear change, one of the two certainty's in life
08-19-2003 Over year old.
 
 
GerryRap
Senior Heliman
Location: Chino Hills, CA

os50

I'd like to see a picture of the webbing too. Also, information on the ceramic bearings would be nice, part numbers and all.
08-20-2003 Over year old.
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

No picture needed, Its the only thin postion of the crankshaft counter balance disk. It doesnt look like a web, cheese cloth, or anything else. Simply the thin portion of the disk, where the connecting rod comes down from the piston, that runs vertical to the drive shaft axis. Webbing, although a correct term, is somewhat of a mis-nomer.

Brian

Team MRC-Hirobo and Model Avionics Rep
08-20-2003 Over year old.
HOMEPAGE  
 
 
rbrodt
Heliman
Location: Colorado Springs, CO

Webbing?

OK, I know everyone else here knows (or think they know) what you're talking about, but are afraid to ask again for a picture of this mysterious "web". I ain't afraid to look stoopeed, so here goes: can someone please post a picture of this "webbing" thing? Thanks!

I too have an OS50 and have not had any problems with it - about 5 gallons through it so far...

Bob

"There are only 10 kinds of people in the world: those who understand the binary number system and those who don't"
08-20-2003 Over year old.
 
 
Doug
Elite Veteran
Location: Naples Florida....

I don't have a picture but if look at the OS engine site:
http://www.osengines.com/engines/heli.html

Look at the parts break down for the "50" and compare it with the 61WC and you can see the difference in the drawing. (the "61WC" does not have the web)

First member of Member of Bearings Anonymous
08-20-2003 Over year old.
 
 
irq
Key Veteran
Location: San Diego, CA

I would appreciate a picture, too.
08-20-2003 Over year old.
 
 
DS 8717
rrProfessor
Location: Here wishing i was somewhere else

Boca bearings has the ceramic bearings. I only used the ceramic bearing in the rear,it takes all the load. The front bearings last forever.
They aren't cheap,just tell them the size of the bearing or the motor you have,they cater to hobbist. Dont waste your money on a ceramic one for thr front, you dont need it. DOUG
08-21-2003 Over year old.
 
 
DS 8717
rrProfessor
Location: Here wishing i was somewhere else

Just one more thing, only the balls are ceramic not the race. It has a plastic retainer, it's like 50 something dollars for both bearings but you dont need the front one. To see the crank webbing,if you have a 46 crankshaft, just make the 50 look just like it.
08-21-2003 Over year old.
 
 
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