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Construction Notes |
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Gun
Arm |
| The main
shaft of the gun arm is made from a length of
25mm steel tubing, inserted through a 100mm HDPE
sphere. |
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100mm
protruded through the other side of the sphere
to form a 'handle' for movement, and this is
protected by a bicycle handlebar grip. |
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The two
collars were turned in hardwood and painted
silver. (Would like to have had these chromed to
match the other metalwork, but there you go!) -
These were fixed to the shaft using epoxy resin
glue. |
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A garden
spray nozzle and tube was installed inside for
possible future use - erm - maybe not eh!! |
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Plunger Arm |
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This arm is
made up from lightweight alloy tubing of three
diameters, and three different lengths of 25mm,
32mm and 38mm, and what a job it was finding a
supplier who didn't want the earth per metre. |
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Thanks to a
friend, I eventually used TV aerial mast - for a
fraction of the price - with 'spot on' results. |
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Basically,
the 32mm tube is fitted through and epoxied to a
100mm HDPE sphere. |
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The 38mm
tube is epxoied to the 32mm tube and to the
outer edge of the sphere, and the 25mm tube
passes through both tubes and the sphere,
protruding 100mm to form a handle, enabling the
inner tube to slide in and out by 200mm. |
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The plunger
head was made up from a 100mm HDPE hemisphere,
with pasticard sheet trims on both inner and
outer surfaces. The plunger is made up around a
3/4" copper tube which fits snugly into the end
of the 25mm tube. |
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The rear
collar was made up from 25mm and 32mm plastic
pipe. |
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Go to Part 8
- skirt
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