Responsible for the change of propeller engine power
11-22-2017, 07:06 PM
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Responsible for the change of propeller engine power
Effect of anti torsion, propeller slipstream, precession. If multiple propeller aircraft, there may be tension asymmetry.
Fixed wing aircraft balance on the ground is mainly affected by the propeller slipstream twist, the flight, when the air hit the side of reverse propeller aircraft vertical tail, will cause the direction of the plane deflection.
If the propeller is rotated to the right, the upper side of the torsion air is turned from the left to the right, and from the left direction to the vertical tail, the rear wing generates the aerodynamic force to the right, and the left center moment is shifted to the center of gravity of the aircraft, that is to say, the nose is deflected to the left. The greater the rotational speed of the propeller, the more obvious the effect of the torsional air flow on the deflection of the aircraft. Therefore, when ground takeoff right rudder correction direction. The air velocity increases due to the aircraft itself, slipstream effect is reduced, the rudder trim can be used.
Responsible for the change of propeller engine power for forward thrust, the importance of self-evident, propeller aircraft principle and rocket, ducted fan aircraft, jet, and marine propeller, Rockets forward because of momentum conservation, if the aircraft is forward on the principle of conservation of momentum, the propeller will turn the air as fast as much as possible back away, that the propeller shape should be like fan blades as wide and short, not like now we see the long thin, a fan blade shaped like a ship propeller, the efficiency is very poor, because the ducted fan engine, accelerating tube and supporting objects such as blocked a lot air guide and air evacuation fan speed is not fast enough, the quality is not enough.
Fixed wing aircraft balance on the ground is mainly affected by the propeller slipstream twist, the flight, when the air hit the side of reverse propeller aircraft vertical tail, will cause the direction of the plane deflection.
If the propeller is rotated to the right, the upper side of the torsion air is turned from the left to the right, and from the left direction to the vertical tail, the rear wing generates the aerodynamic force to the right, and the left center moment is shifted to the center of gravity of the aircraft, that is to say, the nose is deflected to the left. The greater the rotational speed of the propeller, the more obvious the effect of the torsional air flow on the deflection of the aircraft. Therefore, when ground takeoff right rudder correction direction. The air velocity increases due to the aircraft itself, slipstream effect is reduced, the rudder trim can be used.
Responsible for the change of propeller engine power for forward thrust, the importance of self-evident, propeller aircraft principle and rocket, ducted fan aircraft, jet, and marine propeller, Rockets forward because of momentum conservation, if the aircraft is forward on the principle of conservation of momentum, the propeller will turn the air as fast as much as possible back away, that the propeller shape should be like fan blades as wide and short, not like now we see the long thin, a fan blade shaped like a ship propeller, the efficiency is very poor, because the ducted fan engine, accelerating tube and supporting objects such as blocked a lot air guide and air evacuation fan speed is not fast enough, the quality is not enough.
