O.S. Engines FS-30S - Manual (Page 5)

8
INSTALLATION
How to fasten the mounting screws.
Hardwood mounting beams
O.S. radial motor mount
(cast aluminum)
Tighten second nut firmly
down onto first nut.
Tighten this nut first.
Steel washer
3.5mm steel nuts
for FS-40S
Spring washer or
lock washer
Hardwood such as
cherry or maple.
Spring washer
3.5mm steel Allen screw
for FS-40S
Front view
CORRECT
Side view
Top surfaces are in
the same plane. Re-align the surfaces
as necessary
INCORRECT
Top surfaces are not
in the same plane.
Opposite beam
Top surfaces
are not in the
same plane.
Engine does not rest firmly.
Rigid hardwood
(e.g. maple)
At least
15mm(19/32") for FS-40S
At least 12mm
(1/2") for FS-30S
Installation in the model
A typical method of beam
mounting is shown below,left. O.S. radial motor mount
(Available as an optional extra part.
See parts list)
Make sure that the mounting beams are parallel
and that their top surfaces are in the same plane.
3mm steel nuts
for FS-30S
3mm steel screw
for FS-30S
3.5mm steel screw
for FS-40S
3mm steel Allen screw
for FS-30S
At least 12mm
(1/2") for FS-30S
At least
15mm(19/32") for FS-40S
9
The FS Series engines are equipped with self-
reopening choke valves.
Cut the choke rod (supplied) to the length indicated,
then secire the rod by tightening the set screw, using
1.5mm Allen wrench, after installing the engine.
INSTALLATION OF CHOKE ROD
Choke rod
1.5mm
Allen key
Set-screw
Choke rod
approx.
7mm
approx.
2mm
Frame sides
of fuselage
NEEDLE VALVE EXTENSION
Set-screw
1.5mm Allen key
Releasing the
choke rod allows
the choke valve
to open.
(FS-40S)
The needle-valve supplied with these engines is
designed to incorporate an extension so that, when
the engine is enclosed within the fuselage, the
needle-valve may be adjusted from the outside.
Cut a commercially available rod to the required
length, bend one end to an L shape, insert it into
needle's center hole and secure it by tightening the
set-screw in the needle-valve knob with 1.5mm. Allen
key.