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IInstall these in the following sequence.
Screw the exhaust header pipe into the exhaust port until it
"bottoms", then unscrew it approximately 90 degrees,and
secure with locknut.
Screw the silencer onto the header pipe more than 10mm and
maximum 30mm to achieve the desired exhaust angle and
tighten the other locknut.
The application of a heatproof silicone sealant to the threads of
the exhaust system is recommended to reduce the risk of joints
loosening and the leakage of exhaust gases and oil residue.
Also, make a habit to check the tightness periodically and
retighten if necessary.
The exhaust outlet can be rotated every 90 degrees by
removing the four assembly screws and rotate the rear part so
that the exhaust outlet can point required direction.
Be careful not to move the two gaskets and baffle plate at this
time.
Reminder:
Model engines generate considerable heat and contact
with the header pipe or silencer may result in a serious
burn. If you need to tighten the silencer joints, which may
loosen when they are hot, use a thick folded cloth for
protection.
The choice of propeller depends on the design and weight of
the aircraft and on the type of flying in which you will be
engaged. Determine the best size and type after practical
experimentation. As a starting point, refer to the props listed in
the accompanying table. Slightly larger, or even slightly
smaller, props than those shown in the table may be used, but
remember that propeller noise will increase if blade tip velocity
is raised, due to higher rpm or if a larger-diameter / lower-pitch
prop is used.
Warning:
Make sure that the propeller is well balanced. An
unbalanced propeller and / or spinner can cause serious
vibration which may weaken parts of the airframe or
affect the safety of the radio-control system.
DO NOT forget the WARNINGS and NOTES on propeller
and spinner safety given on pages 2,3 and 4.
Type
15x12-14, 16x12-14
Sport
/ Scale
17x10-13, 18x6-10
17x12-13, 18x8-12, 20x8
Size ( DxP )
EXHAUST HEADER PIPE & SILENCER
Can be rotated
by 90 degrees.
Silencer Assembly Screw
Cap Screw
M2.6x12
12
PROPELLER & SPINNER ATTACHMENT
There is a risk, particularly with powerful four-stroke engines,
of the propeller flying off if the prop nut loosens due to
detonation ("knocking") in the combustion chamber when the
engine is operated too lean, or under an excessively heavy
load.
Obviously, this can be very hazardous. To eliminate such
dangers, the O.S. Safety Locknut Assembly was devised.
Install this as follows:
1.
Ream the propeller shaft hole to 8.1mm bore with an
appropriate reamer, checking that the hole is exactly
centered.
To be equal
13
Apply silicone sealant.
Apply silicone sealant.
Baffle plate
Gasket
Exhaust outlet
PROPELLER
To be equal
Ream to 8.1mm dia.
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