User Manual

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 7x4(10LA), 8X4 (15LA), or 9X5

(25LA).

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 element

will overheat and burn out.

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.

Lower voltage to

reduce brightness.

Warning (Very hot)

Never touch the nichrome wire while the battery is

connected.

5 Plug wrench

Used for tightening glowplug. The

O.S. long plug wrench is available

as an optional accessory.

For tightening

glowplug