OS-50SX
 

OS-50SX (ringed)
Tower muff.
9x8 APC
15% PM
OS-8
85 deg.

15.7K

RE: OS-50SX
 

25% Oversized Tower Muff.
15% PM fuel
12.25X3.75 Propeller
9000 Feet over sea level altitude
O.S. plug
95° F

13,700 rpm

RE: OS-50SX
 

OS50 SX
OS#8 plug
85deg
running 5% sport 20%castor
11x7 MA GF-3 prop
11,970 and she pulls :D

RE: OS-50SX
 

Well I have a different one this time and a bit better performance:

OS-50SX
9x8 APC
15% Powermaster
OS-8
70 deg.
1,500 ASL
16K Even

RE: OS-50SX
 

I have a pair of them on a TF Cessna 310.

12-6 APC's, 15% Omega fuel, 60 degrees, 300 ft ASL.

Each turns 11,450.

RE: OS-50SX
 

Dick,

I picked up my TF Cessna 310 last night and per your recommendation I asked for (2) OS 50's but the OS 50's are no longer available... it is reported that OS 55's "that the" distance between bottom of engine mounting to the top of the cylinder head causes a cowl interference. I would have thought that these were the same size castings. Did your OS 50's just barely fit?

Thanks

ACP

RE: OS-50SX
 

They clear the nacelles by about 1/8" to 1/4" maximum.

RE: OS-50SX
 

OS 50 SX
Slimline sport scale in cowl muffler
20% Powermaster fuel
12x6 MAS K series - 11,800 rpm
12x8 MAS K series - 9650 rpm
The 12x8 didn't overwork the motor, but a little overpropped.
Also have an APC 12x7 I haven't tried yet.

RE: OS-50SX
 

Hellcat thanks for posting those figures as I have been wondering how the 50 would pull the larger props. I have a Super Tiger 51 that pull about the same rpms with a 12X6.

RE: OS-50SX
 

OS 50 SX rpm's:

APC 9x8 @ 16,700; APC 10x6 @ 15,200
Sealevel (Florida)
90 degree Fahrenheit
60% humidity
15% PM, 18% oil contents

The 50 SX doesn't like bigger props. Besides, the rear ball bearings, piston rings and piston sleeve are worn up. Replacement parts exceed the cost of new engine. Had the SX 50 in a quick delta wing. Going for a Dubb Jett or MVVS now.

RE: OS-50SX
 

cool I've been on planning on buying 12x6mas k-series for my plane!,
Hey check this out: a guy at the field said that this engine will not work on a plane......
well I did made a few flights but i havent gone back flying
will or will not work for a plane?50 os max
Fernando

RE: OS-50SX
 

Never tried a 12x6 on the OS 50 SX. As I said in my previous post, the 50 SX doesn't like to turn larger diameters with high rpms. It will certainly run but don't expect too much. There is a reason OS take this engine off the line. Try the 55 AX with the bigger prop. If you want to go speed don't waste your time with OS. Go Jett, Rossi or MVVS.

RE: OS-50SX
 

thanks

RE: OS-50SX
 

OS 50SX

Ultrathrust tuned muffler
APC 8.75x8.75w pylon prop
15% nitro
sea level
17200rpm