The parts list:
* Mailing tube, 2" x 22"
* 24mm tube, 4.125"
* 24mm PNC, type unknown, 2.5"
* ¼" balsa fin stock (2 pieces, 3" x 7")
* ¼" launch lug, 2.25"
Building this rocket was easy. I first found the center of the tube and marked centerlines on the top and bottom. I then located the fins based on these centerlines. My fins are approximately 120 degrees apart and are inset one inch from the end of the tube. The lug was mounted in a notch next to the motor tube. I used epoxy for the cone, motor tube, and launch lug. Wood glue was used for the fins. The fins extend all the way across the tube, leaving a 5" x 3" surface exposed. The motor tube extends below the body tube by 3/8".
The tube I used was speckled with paint from a previous project and the nose cone was green. That's all the finishing it got for its maiden voyage. I later filled the balsa and painted the rocket half black and half fluorescent orange. I have since replaced the cone with a fish-shaped fishing lure (with the hooks removed, of course).
This is a fun rocket and is sure to get everyone's attention. I built another version that used Nike-style fin cans in place of the balsa. All I can say is make sure you have enough fin area. That version was not stable!
I have also built two more successful alternative versions as follows:
- Baseline version: status = flown; tube length = 22", fin root = 3", fin span = 5", fin angle =120 deg from top; 15 flights using D12, E9, EM F20, and F24 motors.
- 'Shortie': status = flown; tube length = 16", fin root = 3", fin span = 5", fin angle = 120 deg from top; two flights on E9s, it spun a lot faster than the baseline.
- 'Getting Sideways': status = flown; tube length = 16", fin root = 6", fin span = 4", fin angle = 105 deg from top; on its one E9 flight, it weather cocked more than the others and autorotated down with its nose still pointing up.