A made-up two-stage rocket read from .ork text, an F15 in each stage, calm air
See the Accuracy page before trusting these numbers.

the F15 in `sustainer` lights 0.0 s after the motor in `booster` burns out
the F15 in `booster` lights at launch
the booster drops away from stage 0 at 3.450 s

sustainer lights    3.45 s   212.0 m  110.8 m/s
separation          3.45 s   212.0 m  110.8 m/s
apogee             15.33 s  1356.3 m    0.1 m/s
sustainer lands   141.67 s     0.0 m   10.5 m/s
the booster leaves at 3.45 s and lands at 29.89 s
