- Safety clip spring
- Threaded hole for attachment bolt
- Spring plate
- Wire clip
- Solid fuel charge
- Gauze disc
- Combustion chamber
- Igniter wick
- Jet orifice
- Back plate
- Asbestos washer
- End cap
The burning of the
solid fuel charge (5), once ignited by the wick (8), generates a large quantity of gas
in the combustion chamber (7). This is forced out the jet orifice (9) at great speed,
producing (by Newton's third law of motion) a reaction which drives the motor
in the opposite direction.
The springs (1) are intended to hold the end cap (12)
tightly seated on the asbestos washer (11) so as to seal the combustion chamber (7).
They are seated on the spring plate (3) and act through the clips (4) to provide a safety
release mechanism in the event of the orifice becoming clogged.
gauze disc (6) serves to hold the coiled wick tightly against the fuel charge,
while the back plate (10) protects the washer.