O.S. Engines 46LA-S - Manual (Page 13)

Make sure that there are no kinks or folds in the
plumbing.
Silicone tubing
Use knife or
razor blade.
Do not use wire
cutters or pliers
Note: When cutting silicone tubing......
*If you should need to clean out silicone tubes, use methanol or
glow-fuel, not gasoline.
Note:
Control line models tend to receive more abrupt changes of
attitude than R/C models,which results in air bubbles being
drawn from the fuel tank. Pay careful attention to the
plumbing and fuel tank position.
Silencer (muffler) pressurized fuel system
To reduce variation in fuel "head" and ensure steady
fuel delivery at the carburettor, it is advisable to employ
a silencer (muffler) pressurized fuel system, i.e. to use
the silencer outlet nipple to pressurize the fuel tank as
shown at left.
Fuel
Use a good quality commercial fuel or one of the blends
shown in the table. Fuel "A" is suitable for running-in and
ordinary use. Fuel "B" is for use when more power is required
and for improved flexibility. Note that even a small quantity
of nitromethane (3-5%) will improve flexibility, making the
needle-valve adjustment less critical and improving throttle
response. Use only materials of the highest purity. Synthetic
oils are permissible but are less tolerant of a "lean run" than
castor-oil. If, therefore, a synthetic lubricant is used in the
fuel, readjust the needle-valve to a slightly richer setting, as
a safety measure, in case the fuel/air mixture becomes too
lean through maneuvers in flight. If a more powerful fuel is
used, the engine should be checked out to make sure that
it is sufficiently run-in to operate on that particular fuel
without overheating. Do not use fuels containing less than
18% lubricant.
ADVICE ON SELECTION OF FUEL, GLOWPLUG & PROPELLER
5 ~ 8mm
(example)
15LA-S
25LA-S
40/46LA-S 11.5mm
12mm
13mm
A
A
PLUMBING AND FUEL TANK POSITION
Measurement A (height from the
bottom surface of the mounting lug
to the center of the spray bar)
Metal control line fuel tank installation
R/C clunk tank installation
Make sure that the center of the spray
bar and tank are on the same line.
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