(1) Selecting the wood, cutting the layers glueing them and shaping of the airscrew is shown.(2) A helicopter rotor operates in several different states and speeds, and therefore might by the most complicated airscrew of all.(3) In 1480, Leonardo da Vinci drew his famous ‘ airscrew ’ machine which could never have flown.(4) One envisages disposing the airscrews or the fans at the rear of the engine.(5) More recently the fitting of three-blade constant-speed airscrews has greatly improved the aircraft's take-off and climb and added a further 5 m.p.h. to the top speed.(6) This helicopter had four lifting airscrews and five auxiliary propellers.(7) Women engine fitters also undertake major overhauls on liquid- and air-cooled motors and instruction is given in the maintenance of variable-pitch airscrews .(8) Both companies experimented with variable-pitch metal airscrews in the U.K. during WW1, although none such enjoyed use in normal service.(9) They were driven through a specially designed gearbox and bicycle chains to the airscrews , counter rotating, the propeller RPM was noticeably very slow.(10) Both planes were triplanes with twin tractor airscrews driven by shafts from the fuselage.(11) I decided to leave the airscrews and went in for a landing.(12) It had to be risked, and I shoved the airscrews into fine pitch.(13) The turbine-wheel spins at extremely high speed (>150,000 RPM), limiting most adjustments to the original factory. Finally, ornithopters do not use airscrews at all.(14) Airscrew performance depends on the wind speed as well as the rotational speed.(15) Also included are the times to height for different planes with 2-Pitch and fixed pitch airscrews .(16) There was a variety of different airscrews , three blade, four blade, five blade contra rotating, and three blade twin airscrews.
