the Wasp

My Feedback: (1)

does any one know if the OS 50SX (Plane) Crankshaft will fit in the OS Hyper 50 Heli Engine ??

note that both engines have the same stroke, I'm just not 100% sure if the two cases are identical

thanks guys
Jim

Hobbsy

My Feedback: (102)

Jim, they list a 50 SX and a 50 SXH on this page, they have differing part numbers for the crank.

http://www.osengines.com/parts/xr15600.html

1QwkSport2.5r

The Heli crank is likely shorter much like the buggy engines since they use a clutch. The port timing and size of the crank inlet may be different between the two also. If the crank has the same bearing journal size, I see no reason why it shouldn't work. Just check the inside diameter of the bearings - if they're the same, the airplane crank should fit the Heli crankcase and bearings and vice versa. Boca Bearings search engine is usually pretty accurate for showing what bearings are in an engine, so it would be easy to compare the two.

the Wasp

My Feedback: (1)

"" size of the crank inlet may be different between the two also.""

yes, I was thinking that about an hour after I posted LOL,

I was thinking I could get the Heli Crank to work if I turned a bushing to fit between the Prop nut and the APC prop.

I want to do this for a 46 size scale racing plane, I have searched the Net and people say the Hyper 50 is a real monster in a small, lite plane, even with a stock muffler

thanks for the replies !!
Jim

blw

My Feedback: (3)

I'm surprised the 50SX parts are still available. That was a good engine.

bigman

Most major parts, cylinder, piston, crankcase, piston ring etc., are still available at Rcjapan.net.

Dealspeed

My Feedback: (17)

Thanks for posting that, I have a brand new 50sx that hasn't even been started yet and was actually hoping I could find some parts for it, mainly the piston and ring.