Apogee Club

1962, a dry lakebed, a folding table of teenagers with slide rules. Design a model rocket on graph paper — Barrowman's centre of pressure, a parts-based centre of gravity, real black-powder thrust curves — swing-test it on a string, then launch it into an enormous bleached sky and track a real six-degree-of-freedom flight that disagrees with your arithmetic. Fifteen club challenges, a free field, and a documented Three.js model library.