O.S.
developed the Surpass Series of 4-stroke
engines for discerning fliers who demand
more power. Able to swing larger props
and supply more usable horsepower, Surpass
4-strokes provide the best performance
for your plane, regardless of scale
or flying style.
The
Surpass series is the 2nd series of
4-stroke engines (The 1st series was
the FS series, discontinued and replaced
by the Surpass series around 1986-7).
"Surpass" refers to this series
gaining 30% more power than the previous
FS series.
All
Surpass engines feature a helix gear-driven
camshaft on the front end and dependable
updraft carburetor in the back. The
FS-120S III also features a specially
developed PD-07 regulating style pump
delivers better response and is more
reliable. It also features a new 70N
reversable carborator and F-5020 silencer,
ball bearing-supported camshaft and
crankshaft, and includes a glow plug.
INCLUDES:
One Assembled Engine w/Carburetor and
#F Glow Plug
One Muffler w/ Manifold
One Set of Instructions, O.S. Poster,
and Decal
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% may be used because
it has 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.
Some
differences between 2-Stroke and 4-Stroke
engines:
4-Strokes are quieter.
4-Strokes get better Fuel Economy
2-Strokes generate More RPM (11,000-13,000
RPM vs. 4-Strokes rev to around 9,500
RPM)
4-Strokes generate much more torque and
will swing a larger prop.
4-Strokes have a more realistic sound,
like a real aircraft engine.
The new Surpass engines (Version II and
III) have more power than their predecessors
and they also have more corrosion prevention
on the inside of the crankcases.
