Wednesday, June 17, 2009

Some stats for saturday

My physics final was 115 multiple-guess questions today. it was supposed to take the whole two-hour exams period. I was done in 40 minutes. Hence I had some time to do calculations, plus finally changing the program to allow for multiple stages. It now can calculate single-staged rockets, booster stages (both from a launch pad and mid-air ignition), and sustainers. It works very well, especially at low speeds, but multiple stages at high speeds and altitudes are problematic - it thinks a Comanche-3 on a full load should go 4200 feet (~2600 really), and I think the estimate of 2200 feet for D12-0 / B6-0 / A8-5 is a bit off, but I'll work on that.

Anyway, the calculations:
RocketMotorAltitude, ftMax velocity, fpsOptimum DelayDelay Used
Pen rocketMMX118732.11
Electric Mosquito1/2A32271393.34
Nuclear MosquitoB63201933.34
Orbital Transport*C65112093.83
Comanche-3*: 1st boosterD12339323-0
2nd boosterB6639391-0
sustainerA8228811333 or 5
Twin saucers*: 24mm saucerD12104103-0
18mm saucerC64931620.50
Nantucket Sound**E18W reload3452071.34
24mm SaucerF32T1841820.54
Machnum Force***G78G357215928.57

* The staging calculations aren't working quite right, and so upper stages go too fast and too high. In additions, the calculations give ridiculously high accelerations for UFO-shaped rockets becuase the tenth-of-a-second interval means that the drag is not quite continuous.

** The D12-3 and E9-4 are recommended for the Nantucket Sound, so an E18-4 should work despite the delay.

*** Very unlikely to be flown saturday. I'll save it for another time.

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