Simulated feather

In a wind energy conversion system, to pitch the turbine blades so as to reduce their lift capacity as a method of shutting down the turbine during high wind speeds.

feather

Construction; Drywall

To taper out a layer of joint compound so that it will evenly blend in with the wall and hide butt joints, or any uneven joints.

feather

Weather; Meteorology

A means of representing wind speed in the plotting of a synoptic chart; it is a short straight line drawn obliquely toward lower pressure from the end of a wind-direction shaft. ...

minimum dynamic hydroplaning speed (VP)

Aviation; Airplane flying

The minimum speed required to start dynamic hydroplaning.

rotation speed (VR)

Aviation; Airplane flying

The speed that the pilot begins rotating the aircraft prior to lift-off.

stalling speed (VS0)

Aviation; Airplane flying

The minimum steady flight speed in the landing configuration. In small airplanes, this is the power-off stall speed at the maximum landing weight in the landing configuration ...

stalling speed (VS1)

Aviation; Airplane flying

The minimum steady flight speed obtained in a specified configuration. For most airplanes, this is the power-off stall speed at the maximum takeoff weight in the clean ...

safe, intentional one-engine inoperative speed (VSSE)

Aviation; Airplane flying

The minimum speed to intentionally render the critical engine inoperative.

V-tail

Aviation; Airplane flying

A design which utilizes two slanted tail surfaces to perform the same functions as the surfaces of a conventional elevator and rudder configuration. The fixed surfaces act as both ...