Great Planes Tiger Moth 60 ARF - GPMA1330 - Manual (Page 27)

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O.S. ® .61 FX Engine
Remote needle valve
makes adjustments
safe and easy!
You'll find many refinements on the high-
performance O.S. .61 FX engine. Features include
a backplate-mounted needle for easy, safe mixture
adjustments; advanced carb for precise air/fuel
mixing; coarse threads and an O-ring seal on the
needle valve to prevent "creep" and air leaks;
squared, low-profile head for increased cooling;
and dual ball bearing-supported crankshafts for
lasting durability. Rated at 1.90 bhp/16,000 rpm,
this engine's quality extends to an included muffler
with adjustable exhaust, adjustable fuel inlet and 2-
year warranty protection. Requires glow plug.
OSMG0561
O.S. FS-91 Surpass II Engine
Great fuel economy, low noise and maximum power.
Quieter, more realistic airplane sound.
Improve fuel economy, increase horsepower and cut
engine maintenance time to the bone with an O.S.
Surpass FS-91 II 4-stroke. Enlarged intake valves and
rugged working parts provide superior compression
and improved output in the power stroke. It easily
swings large props and supplies more usable
horsepower for quick takeoffs and acceleration — and
virtually unlimited vertical performance. Features an
improved, easy-to-adjust carb and plated parts to resist
rust. Includes muffler and glow plug. OSMG0896
The strict quality control used when manufacturing Power Point props ensures symmetric pitch: at any given point on one
blade, the pitch will exactly match the pitch at the same point on the opposite blade. This accuracy reduces prop vibration
and boosts thrust at any rpm. Combined with a new airfoil design and the "Power Point" tip, these props are a top choice
for modelers of every skill level. Lighter than maple props of the same size, these fuelproofed beechwood props reduce
rotational mass, letting your engine produce more power with less work. Wood construction also makes Power Point props
stiffer than nylon, so they perform predictably throughout the full rpm range. TOPQ5000-5200
Top Flite ® Power Point ® Wood Propellers
• Swept tip design reduces noise
• Lighter, quieter, and more efficient than ever!
• More thrust for greater power.