OS 61 SF Engine Featured Engine: OS 61 SF

I have had people tell me that the future of power for RC airplanes lies with electric motors or gasoline engines. But I find that two stroke nitro engines are still a very effecient, reliable, and inexpensive way to fly medium sized planes. A sport flyer would be remiss not to consider two stroke nitro engines for power. Listed here are a number of preowned new and used options that might interest you.

BRAND SIZE RATING PRICE SKU DESCRIPTION
FOX 45 7 $50 56  
Fox Eagle 60 7+ $65 49 Looks like a thrashing machine, but boy this baby has power!
Fuji 40 8 $60 31 May be a 9
HB 40 PDP 40 7 $55 43  
Magnum Pro 40 8 $50 42  
Magnum XL 46 6 $35 29  
Magnum XL 61 7 $60 96  
OS AX 75 9+ $175 140 Mounted but never started. No box
OS FP 40 7 $40 84  
OS FX 25 7 $65 102  
OS FX 46 7 $70 75  
OS FX 46 7+ $80 104  
OS FX 61 7 $90 53 Runs like a fine machine.
OS FX 61 7 $90 58  
OS FX 61 7 $90 35  
OS FX 91 7 $110 63  
OS Max H 20 9 $50 15 Not test run because it may be new.
OS MAX H 40 6 $40 50 Idles at 2,300, otherwise is impressive.
OS LA 40 7 $45 30 Tested with a 10x6 prop and ran at 11,100 rpm and idled at 2,000. Transition, bearings, and compression good.
OS SF 40 7+ $65 71 Tested with 11x6 prop. Ran at 11,600 rpm and idled at 1,950. Transition, bearings, and compression excellent. Strong solid engine.
OS SF 61 8 $110 57  
OS SR 60 7 $110 54 My best 60 engine new or used!
OS SR 60 7 $120 33 Or, this might be my best 60 engine!
OS SR 60 7+ $125 64 This one is also my best 60 engine! Tested aith 11x7.5 prop. Ran at 12,040 rpm and idled at 2,000. Compression, bearings, tand transition good.
Super Tiger 40 7 $50 187 Italian made
Super Tiger 40 7 $50 186 Made in Italy. Looks lightly used. Starts immediately. Transition, compression, bearings, high speed and idle excellent. Very responsive.
Super Tiger 45 8 $60 183  
Super Tiger 61 7 $75 182  
Super Tiger 61 7 $75 188  
Super Tiger 75 7 $80 127  
Super Tiger 75 8- $90 87  
Thunder Tiger 46 7 $70 101