O.S. Engines 120AX - Manual (Page 5)

8
STANDARD ACCESSOIES
Glow Plug No.8
(suppplied with the engine)
E-5020 Silencer Extention
Adapter
Needle Valve Extension Cable Set
Silencer Extention Adapter
Retaining Screw (M4x90 2pcs.)
E-5020 Silencer 90 Adapter
Silencer 90 Adapter Retaining
Screw (M4x20 2pcs.)
E-5020 Silencer Assembly
Silencer Retaining Screw (M4x45 2pcs.)
Two versions are available, the one is
without silencer, extension adaptor and 90
degree adaptor and the other is with all of
them.
ABOUT THE ENGINE
This is a high performance two stroke
engine designed for sport and scale models.
Crankcase and cylinder head are of aero-
shape design which give advantage of light
weight, compact size.
The new 70D carburetor needlevalve
assembly has now been angled backward
for safety.
New E-5020 silencer (POWER BOX)
develops very effective muffling.
Also, the compact body enables it to be fit
with in most cowls.
Extension adaptor and 90 degree adaptor
offer various silencer installations.
9
Tools, accessories, etc.The following items are
necessary for operating the engine.
BEFORE STARTING
The choice of propeller depends on the design
and weight of the aircraft and 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,
Propellers
15x10-12, 16x8-10 Sport
props than those shown in the table may be
used, but remember that speed the propeller
noise will increase if blade tip is raised, due to
higher rpm or if a larger-diameter/lower-pitched
prop is used.
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!
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-controlled system.
DO NOT forget the WARNINGS and NOTES
on propeller and spinner safety given on
front pages.
Since the 120AX RING is intended
to be started with an electric
starter, the addition of a spinner
assembly for centering the starter sleeve is
desirable. Use a heavy-duty, well balanced
spinner either of metal or plastic.
Spinner