This is a FS-52 Surpass Four-Stroke Model Aircraft Glow Engine.
FEATURES: Rear-mounted updraft carburetor Helix gear-driven
camshaft Ball bearing-supported camshaft and crankshaft Ringed
piston Two year warranty
INCLUDES: One assembled Engine w/Carburetor and #F glow plug. One
Muffler w/Manifold. One Set of Instructions, O.S. Poster, and Decal.
(Wrenches, Choke Valve Extension, and Mounting Template Are No
Longer Included per O.S.)
REQUIRES: Fuel: 5%-15% nitromethane with 18% lubricant.
Synthetic, castor, or a synthetic/castor blend may be used. NOTE:
Certain four-cycle fuels cannot be used due to low oil content.
However, SOME four-cycle fuels such as the Wildcat 4-Cycle 15%
(CATP9109) may be used due to its 18% oil content. When choosing
fuels for this engine, the modeler must be sure to select a fuel
with at least a 18% lubricant content. Starting and Field Equipment.
Propeller (see SPECS)
SPECS: Bore: 23.0mm (.906") Stroke: 20.6mm (.811") Weight w/o
muffler: 14.2oz (402g) with muffler: 15.2oz (431g) Power Output: .90
BHP at 12,000 rpm Practical RPM Range: 2,300 - 13,000 rpm Crankshaft
Thread Size: 1/4-28 Valve Clearance: Between .04mm and .1mm (.0015"
and .004") Measured between the valve tip and rocker arm. Length:
80.5mm (3.17") from backplate to front of the drive washer. Width:
34mm (1.33") width of engine neglecting the mounting flanges 44mm
(1.73") side-to-side mounting holes on-center Height: 101mm (3.97")
Prop(s): 10X8,10X9,10.5X8,10.5X9,11X6,11X7,11X7.5,12X5,12X6,12.5X6
Construction: Aluminum and Aluminum alloys
COMMENTS: For the helicopter version, use OSMG1952. The Surpass
series is the 2nd series of 4-stroke engines. The 1st FS series was
replaced by the Surpass series around 1987. "Surpass" refers to this
series gaining 30% more power than the previous FS series engines.
Some differences between 4-stroke and 2-stroke engines; 4-strokes
are quieter 4-strokes get better fuel economy 2-strokes generate
more rpm (11,000-13,000 rpm with prop while 4-strokes rev to around
9,500 rpm) 4-strokes generate much more torque and will swing larger
props. 4-strokes have a realistic sound like a real aircraft engine.
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