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Nose dive" explains itself. In a Curtiss one must not nose dive too far - or the speed and consequent wind pressure will be too much and the machine will not right itself. I've seen a machine - or what was left of one - that "nose-dived" into the earth. The pieces weren't worth picking up.

"Nose-or tail-spin" -the most dangerous stunt of the Curtiss - more killed this way than any other way. It is a nose dive and a spin combined. It begins when the controls are set for a "bank" and a "stall" takes place. A left "twist" is more dangerous than the right because the propeller "torque" aids it. A good thousand feet is the usual distance of a "nose- or tail-spin" Neutralize & slight forward on joy stick to end spin.

"prop. torque" - force which makes machine tend to turn to the left. It is explained by gyroscopic action. In starting a flight with one of these practice machines the "right rudder" (pressing on the rudder with the [[underline]] right [[/underline]] foot to make the tail swing to the [[underline]] left [[/underline]] and