Percival Prentice 1 prepic025


                            PART II-HANDLING


    37.   Climbing

    (i)   For maximum rate of climb, use full throttle, 2,400 r.p.m.
          and climb at 70 knots.

   (ii)   Unless operating in sandy or dust-laden conditions set
          the air-intake filter control in at 1,000 ft.

    38.   General flying

    (i)   Stability
          At all loadings, and under all conditions of flight, longi-
          tudinal and directional stability are satisfactory.  Lateral-
          ly, however, the aircraft is neutrally stable.

   (ii)   Changes of trim
          Flaps down	...	...	...	...	Nose up
          Flaps up	...	...	...	...	Nose down
          An appreciable nose-down change of trim occurs when
          the throttle is closed amd vice-versa when it is opened.
          There is no change of trim on opening or closing the
          hood.

  (iii)   Controls
          All controls are effective throughout the speed range.
          The rudder and elevators are light, nut the ailerons are
          heavy and lack harmony with the other controls.

   (iv)   Propeller
          The propeller tends to overspeed when power is increased,
          therefore, the r.p.m. control lever must be moved slowly
          and carefully and rapid movement should be
          avoided.

    (v)   Flying at reduced airspeed
          Reduce speed to 85 knots and lower the flaps to the
          TAKE OFF (maximum lift) position.   Select 2,200 r.p.m.
          and fly at 70 knots.

    39.   Stalling

    (i)   The stalling speeds, engine off are :-

          Flaps up	...	...	...	...	52 knots
          Flaps fully down	...	...	...	48 knots
          
   (ii)   Warning of the approach of the stall is given by elevator
          buffeting and slight longitudinal pitching which occurs
          about 5 knots above the stall.   This may be mistaken for
          the stall itself, but as the control column is eased fully
          back the buffeting increases and the nose and either wing
          (usually the left) drop.   Recovery is normal and easy.