pub const CHART_Y: [[f64; 20]; 8];Expand description
MIL-HDBK-762 Fig. 5-122 (printed p. 5-187, PDF p. 425), “Wave-Drag Coefficient of Conical
Boattails at Supersonic Speeds”: y = 4 C_D (l/d₁)² on π d₁²/4, one row per
CHART_AREA_RATIOS at CHART_X. Read from a 200-dpi render with the grid fitted for tilt,
each curve fitted in ln y against ln x and checked on an overlay: ±(0.005 + 2%), the lines
being about 0.017 thick. The 0.80 curve’s reading rises by 0.001 past x = 1.2, where the
printed line doesn’t; it is held at 0.0332. The chart starts at x = 0.05, where the readings
hook; they start at 0.06.