O.S. Engines Surpass Series

O.S. Engines® Surpass™ Series

Unsurpassed realism in 4-stroke power.

Surpass 4-strokes provide the best performance for your plane, regardless of your flying style. And you’ll enjoy pleasant scale sound, improved fuel economy and the ability to swing big props, too — all reasons why these rank among experienced pilots’ favorite engines.
  Surpass engines have a helix gear-driven camshaft on the front end and dependable updraft carburetor in back. Enlarged intake valves and strong working parts yield superior compression and improved output in the power stroke. All feature ball bearing-supported camshafts and crankshafts.
  The FS-30 for small planes delivers 18% more power than its predecessor, the FS-26. Modelers with mid-size planes can opt for the 40 Surpass.
  The 52 Surpass also offers the installation ease of a reversible carb. It's a plus also found on larger Surpass engines, along with a permanently sealed, rubber-sealed ball bearing and corrosion-resistant plating on the crankshaft, camshaft and piston. The FS-70 Ultimate w/Pump offers smooth predictable power - regardless of the planes attitude-thanks to an ingenious pump system. Moving the next step up in displacement results in a choice of two hard-charging engines: the 91 Surpass II with a #60P carb; and the 91 Surpass II w/Pump for more consistent performance anywhere in the sky.
  Both 1.20-size Surpass engines feature a ringed piston design and carb with built-in pressure regulator. The 120 Surpass III features improved regulating-style pump for increased reliability and response throughout the rpm range, plus a large-volume muffler that reduces noise but leaves scale sound intact.
  For quality, performance, and value that last year after year, get O.S. Surpass 4-strokes. All include glow plug, muffler and 2-year warranty protection!

Benefits of 4-Stroke Engines