O.S. Engines 46LA-S - Manual (Page 11)

Finally, secure the complete assembly to rear cover
plate as before. 3.
As self-tapping screws are used for unit
attachment, screw them in carefully so that screw
threads match those of the unit body precisely.
Note:
Remove the two cover-plate screws which secure
the needle-valve assembly bracket, then carefully
remove the two screws by which the needle-valve
unit is attached to the bracket.
Rotate the needle-valve unit through 90˚ and re-
attach it to the bracket in the required position.
Vertical position
Horizontal position
Cover plate fitting holes
Needle Valve unit
Needle Valve unit attachment screws
Needle-Valve
Assembly Bracket
1.
2.
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. (See
"Advice on selection of fuel, glowplug and propeller")
2 Glowplug
O.S. A3 glowplug is installed in the engine.
3 Propeller
Suggested size is 8 X4 (15LA-S), 9 X6 (25LA-S),11X5
(40LA-S), or 11 X6 (46LA-S).
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).
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 the element
will overheat and burn out.
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