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 DICTIONARY OF AVIATION 97

flight, to the line of the direction of its course or to the horizontal.

artificial flight, flight by artificial means, or by machines or apparatus artificially designed or constructed; mechani- cal flight; manf light; aviation: distinguisht from natural flight.

axis of flight, the axis, line, or course along which flight proceeds; the line passing thru the center of gravity of a flyer and extending in the direction of its motion thru the air.

bounding flight, same meaning as leaping flight.

dynamic flight, flight by means of powersdriven flyings; machines; power flight; mechanical flight.

flapping flight, flight in which the wings or other aero- feils are flapt or moved up and down, compare soaring flight, rowing flight.

free flight, flight or flying which is unhinderd by arti- ficial or outside restraint of any kind, unaided by support, and unattacht to the earth; flight in which the bird or fly- ing^machine is aloft and completely at liberty to pursue its course; unimpeded flight.

hovering flight, a mode of soaring flight in which the bird or flyer hovers or remains suspended over or about a particular place or spot; stationary flight; hovering.

leaping flight, flight characterized by movements resem- bling leaps or bounds; bounding flight.

line of flight, the line or direction in which flight takes place; the course or route along which a flyer moves thru the air; the flightepath. compare axis of flight.

mechanical flight, artificial flight accemplisht by me- chanical means; flight of man in power^dnven machines.

natural flight, flight, such as that of birds, insects, etc., by natural means; the power of flying by means of wings or other organic structures : distinguisht from artificial flight.

of the same flight, having the same power, mode, or ca- pacity of flight : said of arrows of equal size and weight.

orthogonal flight, see under orthogonal.

power flight, flight by means of artificial motor power; human flight in power^driven machines; dynamic flight.

rowing flight, flight characterized by a rowing^movement or regular or rithmic flapping^motion of the wings; a mode of flapping flight.

sailing flight, flight in which the bird or flyer sails en the wind, or soars or floats en air^currents ; soaring flight.

skimming flight, flight characterized by skimming, soar- ing, or gliding.

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