My 54 mm rocket on a 168H54-10A, from a 1.8 m vertical rail in calm air
Not yet validated: see the Accuracy page before trusting these numbers.

drag                  apogee  apogee at  top speed
                         (m)        (s)      (m/s)
hpr's own drag         1145.1      14.06        187
hpr's, 10% higher      1091.2      13.65        183
a curve (invented)     1146.5      13.99        188

A curve that ends at Mach 0.4 stops the flight: Mach number past the drag curve's last point, 0.40
