This is due to its much larger size and mass as well as a newton-impulse of 512 rather than the prototype’s 57. Unlike the prototype rockets which are mid power, this rocket classifies as a high power. Once these issues have been resolved, I started work on the large rocket. To be on the safe side, I also moved the CG slightly forward by adding a larger and heavier parachute to eliminate any instability issues during flight. My issue was that the CP was too far forward so I once again modified the rocket by replacing the fins with much larger ones which resulted in the CP moving backwards by several centimeters. ![]() In order for a model rocket to be stable, the center of gravity (CG) has to be in front of the center of pressure (CP). Once the thrust issue has been resolved, problems with stability arose. To accommodate this larger motor, I completely redesigned my prototype rocket. The one I selected was a 29mm motor with a newton-impulse of 57. Finally, I decided to use ammonium perchlorate motors rather than black powder ones due to their increased thrust and availability in larger sizes. I designed and printed the additional stage on a 3D printer but unfortunately, this also was not enough since this setup only resulted in a 10-20m altitude increase due to the increased mass caused by the 3D-printed booster stage. My next idea was to use two D12 motors setup in a booster configuration, where one stage starts first and ignites the second stage once it has burnt out. For my first flights, I thought it would be enough to use common D12 motors although as my tests revealed, this was not enough for the stabilization system to function as intended due to the short flight time and low speeds. In order to install this arduino control system in a rocket, stability and mass must be considered. ![]() ![]() Before starting work on the final rocket, I decided to gain some experience and eliminate any errors by testing on a prototype rocket.
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