O.S. Engines 46AX - Manual (Page 9)

BEFORE STARTING
Tools, accessories, etc.
The following items are necessary for operating the
engine.
1 Fuel
Model glowplug engine fuel of good quality, preferably
containing a small percentage of nitromethane.
2 Glowplug
Fit a glowplug to the engine. O.S. A3 plug is supplied
with the engine.
3 Propeller
Suggested size is 11X6.
Resistance coil
(nichrome wire)
Adjust applied voltage by changing the position of clip on
resistance coil until glowplug element is glowing bright red.
Battery leads
Raise
voltage to
increase
brightness
.
Low
er v
oltage to
reduce br
ightness
.
Warning (Very hot)
Never touch the nichrome wire while the battery is
connected.
1.5 volt heavy-duty
dry battery or 2 volt rechargeable
lead-acid cell (at least 5Ah)
If a 2-volt cell is employed,
use a resistance wire, as
shown, to reduce applied
voltage, otherwise element
will overheat and burn out.
4 Glowplug battery
The power source for heating the glowplug may be
either a large heavy-duty 1.5volt dry cell, or preferably,
a 2-volt rechargeable lead-acid cell (accumulator).
Battery leads 5 Battery leads
These are used to conduct current
from the battery to the glowplug.
Basically, two leads, with clips, are
required, but, for greater conve-
nience, twin leads with special glowplug connectors,
as shown on the right, are commercially available.
17
12V Battery
Starter
6 Fuel tank
For installation in the model a 300cc (10.6oz.) tank is
suggested.
7 Fuel bottle or pump
For filling the fuel tank, a simple,
polyethylene "squeeze" bottle, with
a suitable spout,is all that is
required. Alternatively, one of the
purpose-made manual or electric
fuel pumps may be used to transfer
fuel directly from your fuel
container to the fuel tank.
Fuel bulb
Manual Electric
Fuel pumps
An electric starter is recommended
for starting.
8 Electric starter and starter battery
9 Fuel can filter
Fit a filter to the outlet tube of your
refuelling container to prevent entry
of foreign matter into the fuel tank.
Fuel Can Filter
10 Silicone tubing
This is required for the
connection between the fuel
tank and engine.
11 Plug wrench
Used for tightening glowplug. The
O.S. long plug wrench is available
as an optional accessory.
For tightening
glowplug
STARTING
Install appropriate propeller and tighten securely.
To facilitate electric starting, Install an O.S. solid
aluminium alloy spinner-nut for centering the rubber
drive insert of the starter. Alternatively, a good
quality spinner, enclosing the propeller boss, may be
used, but make sure that it is of precision-made and
sturdy construction so that the spinner shell cannot
loosen when the starter is used. Close the throttle.
1.
2.