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  1. Bill Hanson

    Measuring stress on drag device

    Hi All, I’m planning my L3. I have a 4” fiberglass MadCow DX3 XL, and planning on using an M1350 motor. However, this combo busts the altitude waiver, bottom line is that I need a planned apogee at about 11,000 AGL. Thought first about adding weight, but need close to 4 KG extra which creates...
  2. I

    Predicting roll moment coefficients using RASAero

    Looking for method\aeroprediction software to calculate roll moment coefficients of rocket with canted fins. Here is my attempt According to this work: one can calculate roll moments coefficients using Cnalpha force coefficient. The idea of...