Project
415 Flight
Post-flight Analysis
- This particular design was designed to separate in the middle to let the parachute out. The weight above the seam caused the front end to wobble a small amount ending in the rocket becoming unstable and breaking up in flight. The engines however, worked great. Both flight engines were 40" case bonded fuel with a maximum thrust of 400 pounds.
- Two 40" engines were static tested as well as two 53" engines that each produced a maximum thrust of 630 pounds and a total Ns of 4215.
- All engines had a KN of 400.
Static 04 data, 53" engine.
Construction
- A 53" case bonded 2" PVC engine is the largest 2" engine I am physically able to make. Material handling and component cost are responsible for this limit.
- Rocket was made from 3" ABS with 1/4" plywood fins.
- On board video cameras failed to record video due to the shock of the impact on landing causing the batteries to come out.
- Fuel ratio had to be slightly modified for the 53" engines do to the weight of the fuel causing the fuel itself to deform near the throat. A slightly modified mixture solved this problem.
Pros
- Perfect fuel mixture.
- Fuel is flexible and will not crack.
Cons
- Rocket design needs work.
Pictures
Video
Drawings
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