Military aeroplanes, simplified, enlarged; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, specifically arranged for the use of aviators and students . called a balanced control. Due to the movement of thecenter of pressure forward, when the angle of incidence is increased,however, a point may be reached where the center of pressure moves infront of the pivot, and the surface then catches the air in a veryundesirable manner, tending to remain offset, because the air pressure infront of the pivot is greater than the air pressure beh
Military aeroplanes, simplified, enlarged; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, specifically arranged for the use of aviators and students . called a balanced control. Due to the movement of thecenter of pressure forward, when the angle of incidence is increased,however, a point may be reached where the center of pressure moves infront of the pivot, and the surface then catches the air in a veryundesirable manner, tending to remain offset, because the air pressure infront of the pivot is greater than the air pressure behind. PARTIALLY BALANCED CONTROLS So we again have a compromise, and the unbalanced flap hingedto a surface, which resists being offset to higher angles of incidence, isso constructed that it has a balanced portion, illustrated p. 18, not greatenough ever to permit the air pressure in front of the pivot to be greaterthan the air pressure behind the pivot; but of enough consequence toso greatly reduce the forces required for control, that this partial bal-ancing makes it possible for huge 20,000 lb. aeroplanes to be controlled,readily, by the touch of the pilots hand. Angle gradually reducingon this side--—. WASH OUT 90 WASH OUT AND TORQUE CORRECTION For reasons of stability, and particularly in rendering the wing flapsmore sensitive, the angle of incidence of the wings is frequently reducedvery gradually from the body out towards the tips. This may be asmuch as 3°, where the angle of incidence at which the wings are fastenedto the body axis is 5°; at the tips the wings will only have an incidenceof 2° This reduction of angle is called the wash out. A wash in, an increase in angle towards the tip, is frequently givento one side of the machine, in order to overcome the turning tendencyof the torque of the propeller. If the aeroplane has no grip on the airlaterally, instead of the propeller turning, the propeller might remainstationary, the path of least resistance being for t
Size: 3043px × 821px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectairplanes, bookyear19
