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INSANE AIR &
INSANE AIR DART
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Last Updated
4/17/01
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Until I here
otherwise, Insane Air is the Single Stage World
Record Holder for compressed air rockets with an altitude of 772'.
The Insane Air Dart will soon be making an attempt at the Two
Stage World Record of 1061'.
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By Robert Youens
TXSNAPPER@AOL.COM
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Insane Air is a 8'
6" long, FTC rocket. It
uses a launch tube
launcher 7' 10" long and 28mm in
outside diameter. The launcher has
a "tank" capacity of approximately
30 liters. The rocket uses a 30mm
nozzle from a 3L bottle. The release
mechanism is a modified Clark cable launcher.
The difference is that the
o-ring is located on the outside of the neck
of the bottle. With an area of
nearly 2 square inches in the nozzle,
150psi launch pressure and a rocket weight
of 8 oz. The lift off force is
approximately 600 G's.
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The Insane Air
Dart is made from an Estes
see through demonstration rocket. The
body is 26mm. You can see the
deployment system located in the body.
Though not completed in this picture, this
deployment system is similar to the one
used on Insane Air and the Insane Air
Booster for the Insane Air Dart.
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An Adept ALT-05
altimeter will fit in the
nose cone.
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Projected altitude
for the Insane Air Dart is
1061' plus.
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This is a close up
of the Horizontal
Deployment. At this point in construction the ejection
rubber band, release rubber band and chute
have not be installed.
For those familiar
with Horizontal
Deployment, the ejection rubber band will be
installed in the typical fashion (as shown
above). The release rubber band however, will be
connected to the metal loop at the top,
go under the next metal loop, over the
packed chute in the ejection tube (a hole has been
punched on each side of the top of the
ejection tube) and back down to the shaft of
the tomy timer.
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When the "Boat
tail" is completed a 3 inch
long tube will be glued into the tail. The tube
of the dart will slide onto a post on top of the
booster.
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New and improved
Insane Dart. When the
tube was glued into the boat tail the cg
moved too far back in the original design. I
removed the original fin section, which
shortened the dart by about 2 inches. This
should reduce drag and reduce torque place
on the dart during take off.
I also went with 4
fins instead of three to
increase stability as it leaves the booster
post.
The booster has
two upper bulkheads. The
first is a pressure bulkhead, the second is
the booster post bulkhead. Between the two bulkheads
is the horizontal deployment
system for the booster recovery.
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View of the brass
tube inserted in the boat
tail. The tube and the booster post are
both 2.5 inches long.
The launch post is
a 3/16 bolt with a small
washer inside the bottle cap and a fender
washer on the outside to spread the force of
the dart on the bulkhead during takeoff.
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