OS .50SX, what prop
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OS .50SX, what prop
so I have an OS Hyper .50 that I will be running on a Wold Models P-40, I have a GMS .47 muffler, the muffler is a bit big, it's just a bit longer and just a bit larger diameter than the stock OS .61 FX muffler (#E-4010), so I feel this combo will work out pretty much the way I want it to, I have a few jugs of 30% to burn in it
too add to all that , on the lathe I have cut down the fins on an older OS .50 SX Heli head (silver head) to use
so what props are/were you using on your OS.50SX plane engines ??, I thought I would start there
thanks guys !!, keep them flying
Jim
too add to all that , on the lathe I have cut down the fins on an older OS .50 SX Heli head (silver head) to use
so what props are/were you using on your OS.50SX plane engines ??, I thought I would start there
thanks guys !!, keep them flying
Jim
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Join Date: Dec 2001
Location: Colonial Beach, VA
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OS Max 50SX
http://manuals.hobbico.com/osm/50sx-40-46-61-91fx-manual.pdf
11 x 6 to 11 x 10 Sport
12 x 7 to 12 x 9 Aerobatic.
http://manuals.hobbico.com/osm/50sx-40-46-61-91fx-manual.pdf
11 x 6 to 11 x 10 Sport
12 x 7 to 12 x 9 Aerobatic.
Last edited by Hobbsy; 07-11-2018 at 02:04 AM.
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Dave, in your Scepter link look at the plastic prop RPM numbers, compare props close to the same size, such as 11X7, 11X8 and 12X6,, the RPM numbers for those props are very interesting, as for the APC props alone in those sizes they are all within 250 RPM, I have not seen numbers that close on any other engine like that, I'm betting that engine's peak torque point is right around 11 grand
Jim
Jim
Last edited by the Wasp; 07-15-2018 at 07:46 PM.
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I've been flying an OS 50sx on a hanger 9 twist 40 for several years. This plane has a very thick airfoil and for 3D type flying the APC 13x4W gives me the best results. I also use one of the old Tower Mufflers on it
Last edited by restlessrocks; 10-12-2018 at 11:23 AM. Reason: double post