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HOME BUILT MODEL ROCKET
ENGINES |
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Now you can make your own model rocket engines for
only pennies each. A C18-5 costs only 9¢. Shown here is an
F40 engine being test fired. Cost-74¢. |
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The first step
in making a model rocket engine is rolling the casing.
A special fire-proofing and hardening agent is applied as an adhesive to
sheets of heavy kraft paper and then simply rolled tightly around a
wooden dowel. |
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A 1" (inside
diameter) home built engine such as the one being test fired on the cover is
compared with a standard commercial engine .69" dia. by 2.75" long. |
Homemade engines
can be made any size disired. The basic different sizes described in
the manual are shown here compared to 25¢ coins. |
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After the engine casing has dried it is inserted into
the engine mold and is loaded with clay which forms the nozzle,
propellant, the time delay mix and ejection charge. That is all
there is to it. |
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All engines described in the
manual have been pre-tested on an impulse recorder that accurately
records the thrust-time (or impulse) curve and exact time delay.
Thousands of engines have been similarly tested by the author over the
last 12 years in the process of developing the efficient engines you now
can build too. Shown here is a commercial D engine being tested
for comparison. |
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