Equivalent airspeed Equivalent airspeed (EAS) is defined as the speed at sea level that would produce the same incompressible dynamic pressure as the true airspeed at the altitude at which the vehicle is flying.

The true airspeed (TAS also KTAS, for knots true airspeed ) of an aircraft is the speed of the aircraft relative to the airmass in which it is flying.

Structural analysis is often in terms of incompressible dynamic pressure, so that equivalent airspeed is a useful speed for structural testing.

The airspeed is derived from the difference between the ram air pressure from the pitot tube, or stagnation pressure, and the static pressure.

For example, if the MMO is Mach 0.83, then at where the speed of sound under standard conditions is , the true airspeed at MMO is .

At the critical Mach number, local airflow in some areas near the airframe reaches the speed of sound, even though the aircraft itself has an airspeed lower than Mach 1.0.

In addition, as many models use parachutes to slow and arm the submunitions, the weapons can be easily blown by wind or diverted when released at an incorrect airspeed or altitude.

Their wide area effects and the influence of wind, altitude of release and airspeed on free falling submunitions make them an immediate danger to civilians at the time of the attack.

List of target drones Airspeed Queen Wasp ATL MSAT 500NG ATL GSAT 200NG BQM 74 Chukar Curtiss Queen Seamew de Havilland Queen Bee Denel Dynamics Skua DRDO Lakshya Meggitt Banshee Fairey Queen GAF Jindivik GAF Turana Miles Queen Martinet Ryan Firebee TAI Şimşek de Havilland Vampire QF 4 See also Target tug, the towed variant Powered seaborne target, the naval counterpart References