O.S. Engines FS-30S - Manual (Page 7)

12
Fuel Can Filter
3
11 Silicone tubing
This is required for the connection
between the fuel tank and engine.
10 Fuel can filter
Install a filter in the outlet line of your refuelling
container to prevent entry off oreign matter into
the fuel tank. (Refer to of STARTING THE
ENGINE section.)
9 Electric starter and starter battery
An electric starter is recommended
for starting.
FUEL AND PRESSURE LINES
Fuel level
Muffler to tank pressure line
Connect suitable lengths of silicone tubing, as
illustrated, after installing the engine.
Attention to tank height
Note: When cutting silicone tubing···
Locate the fuel tank so the top of the tank is
5-10mm(1/4-3/8") above the level of theneedle-valve.
5-10mm
Silicone tubing
Use knife or razor blade
Do not use wire cutters
or pliers.
*If you should need to clean the silicone tubing, use methanol
or glow-fuel, not gasoline or kerosene.
Silencer (muffler) pressurized fuel system
To reduce variation in fuel "head" and ensure steady
fuel delivery at the carburetor, 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.
13
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 higher nitro 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
A B
75%
20%
5%
65%
20%
15%
Methanol
Castor Oil
Nitromethane
Model engine fuel is poisonous. Do not
allow it to come into contact with the eyes or
mouth. Always store it in a clearly marked
container and out of the reach of children.
Model engine fuel is also highly flammable.
Keep it away from open flame, excessive
heat, sources of sparks, or anything else
which might ignite it. Do not smoke, or allow
anyone else to smoke, near to it.
Reminder!
PROPELLER
Suggested propeller sizes are given in the table. As
the ideal propeller diameter, pitch and blade area vary
according to the size, weight and type of model, final
propeller selection will require in flight
experimentation.
Never touch, or allow any object to come into
contact with, the rotating propeller and do not
crouch over the engine when it is running.
Reminder!