Pressure tank.

The total force resulting from the application of a number of forces.

Back swept wings with the tips to the rear of the wing center.

The fabric forming member of the wing structure.

A control surface used for steering in a horizontal plane.

Oscillation about the fore and aft axis.

S

SCREW. (Fr. Helice.)

See PROPELLER.

An aeroplane equipped with floats or pontoons for landing on water.