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REGULATIONS

SECTION 3041                                     
TAKE OFF

A. GROUND RUN

1. Make all take-offs at maximum power. when correct fuel (90 octane) is used, the heating of the cylinders is no greater than when using low boost pressures. The take-off is accomplished more quickly and the power may be reduced sooner if the maximum pressure boost are used.

GR-120G-102                          
2. Take off normal horsepower is 1100 obtained by using 43" Hg manifold pressure and 2250 to 2300 RPM with "FULL RICH" mixture. If engines do not turn within this range of RPM's it should be noted in the pilot's report to maintenance

R-1830-92
Full rated take-off horsepower is 1200, obtained by using 48" Hg, manifold pressure and 2700 RPM with "Take-off & Climb" mixture. Cowl flaps should be in "TRAIL" position.

3. The Captain (or First Officer if he is making the take-off) shall keep his hand on the throttles continuously throughout the take-off and until the airplane has an airspeed well above single-engine minimum operating speed. The throttle lock shall be sufficiently tight to prevent the throttles from creeping.

4. Advance the throttles steadily, allowing the plane to roll and gain headway as the engines are accelerated. The take-off time and distance are shorter when accomplished this way than when the engines are brought up to speed with the wheels locked. when plane is stationary, cavitation of air in front of the propeller reduces the thrust of the propellers until the plane reaches an appreciable speed on the take-off run. Power should be applied slowly to avoid wear or damage to the propeller and blower gear trains.

5. Raise the tail wheel when it is ready to come up with normal pressure. Forcing it off the ground with the elevators before this time slows up the take-off because of the excess drag of the depressed elevators. This may not be true when the tail wheels sinks deep in muddy ground as its drag under such conditions may be greater than that of the depressed elevators.

6. The plane should leave the ground at 80 to 85 MPH indicated airspeed with a light pull on the elevators. Maximum results may be obtained in emergency by pulling back on the elevators at about 70 MPH indicated airspeed, but this is not recommended as safe single engine flying speed if above 85 MPH.

1/15/46                            
DC--3 FLIGHT OPERATION