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"prop", affectionate for propeller.

"rev. counter", ditto for revolution counter, giving speed of crankshaft of motor.

"joy stick" - the one and only marvelous part of the machine. Push it forward, down you go. Pull it back, up you go. [[strikethrough]] Shove [[/strikethrough]] Shove it to the right and down goes the right wing. Ditto to the left. You steer with your feet and use the "joy stick" in conjunction with the rudders in "banks". Right rudder, right on joy stick and you go around a right turn in a "bank" like this [[drawing of a bi-wing plane]] [[left arrow points to right wing tip of the drawing]] This is way down and the other wing is way up. A vertical bank" is a bank beyond 45°, or are l to the earth thusly [[drawing of  plane captioned 'this into' with arrow pointing to another plane captioned 'this', above 'earth' depicted by dark lines]] 

"stall" - machine climbs to rapidly, looses flying speed, quivvers for a moment - it seems eternity - than nose-dives or spins.
[[drawing of a rising line to a point marked "stall" and a steep downward curing line with arrow head]]