In a flash fire, the flame spreads at subsonic velocity, so the overpressure damage is usually negligible and the bulk of the damage comes from the thermal radiation and secondary fires.
12.
Lavochkin's current landing strategy is to use two parachutes; one will open while the module is still moving at supersonic speed, and another will deploy once the probe has been slowed down to subsonic velocity.
13.
The project sponsor set forth a number of specific requirements, namely that the cartridge had to fit in the M4 carbine platform and magazines and be capable of firing heavy-for-caliber projectiles at subsonic velocity using suppressors.
14.
Mars'combination of thin atmospheric density and relatively large gravity makes it impossible for a conventional heat shield to brake landing capsules of more than a few tons'mass to subsonic velocity before they would impact the surface.
15.
The tiny case of the . 22 LR and the subsonic velocities ( when using subsonic ammunition ) make it well suited for use with a firearm suppressor ( also known as silencers or sound moderators ).
16.
Most ramjets operate at supersonic flight speeds and use one or more conical ( or oblique ) shock waves, terminated by a strong normal shock, to slow down the airflow to a subsonic velocity at the exit of the intake.
17.
As in ramjets, a scramjet relies on high vehicle speed to forcefully compress the incoming air before combustion ( hence " ram " jet ), but a ramjet decelerates the air to subsonic velocities before combustion, while airflow in a scramjet is supersonic throughout the entire engine.
18.
The region where the supersonic speed of the solar wind drops abruptly to subsonic velocities is known as the termination shock zone, while the boundary where the flow of the solar wind finally ends and the gases of interstellar space fill the void is called the heliopause.
