Function recovery 

pub fn recovery(
    recovery: &Recovery,
    rocket: &Rocket,
    assembly: &Assembly,
) -> Result<Recovered, RecoveryRefused>

The flight’s devices for the parachutes and streamers of rocket, as the .ork file’s recovery states them, in the configuration assembly holds assembled: each as OpenRocket flies it (the OpenRocket technical documentation v13.05, §4.2.5; ADR-153, the decision to fly them so).

• Drag. A parachute’s drag area is C_D · π D²/4, D its canopy diameter and C_D the file’s, or OPENROCKET_PARACHUTE_DRAG_COEFFICIENT for auto. A streamer’s is a stated C_D on its area l · w, or for auto OpenRocket’s appendix C correlation (StreamerModel::OpenRocket) from its length, width and fabric, for a strip no wider than it is long (hpr_sim::recovery::MIN_STREAMER_ASPECT_RATIO).
• Opening. At once (hpr_sim::Inflation::Instant), the file’s delay after its event.
• Events. apogee is Trigger::Apogee; altitude is Trigger::Altitude, which opens at apogee a device set above it, where OpenRocket’s one probed run never opened it (ADR-056 §5, the .ork reader’s probe); ejection is Trigger::MotorDelay of the motor of the device’s stage whose charge fires first (OpenRocket’s “first ejection charge” of the stage); launch is Trigger::Time at the delay. never, and ejection with a motor that has no charge, give no device but a Recovered::not_deployed entry.

Every device rides the first body. For a configuration that separates under power, use separated_recovery, which puts each on the part that carries it.

Errors

RecoveryRefused: a device in a part hpr does not read, one deployed at a separation or by an unknown event, at the charge of a stage with no lit motor, a part not in assembly, or a number outside its domain.