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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'.
By Robert Youens
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.
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.
An Adept ALT-05 altimeter will fit in the nose cone.
Projected altitude for the Insane Air Dart is 1061' plus.
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.
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.
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.
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.