Figure 32: Obstacle Take-off Chart

6,000 5,000 4,000 3,000 2,000 1,000 0 0 20 40 60 80 100 24 26 28 30 32 34 0 10 20 30 OAT − °F HEADWIND − KTS WEIGHT X 100 LB TOTAL TAKEOFF DISTANCE OVER A 50 FT OBSTACLE − FEET REFERENCE LINE REFERENCE LINE PRESSURE ALTITUDE − FEET ISA 8,000 6,000 4,000 2,000 S.L. IAS TAKEOFF SPEED (ASSUMES ZERO INSTR ERROR) WEIGHT (LB) KNOTS MPH KNOTS MPH LIFT-OFF 50 FEET 3,400 3,200 3,000 2,800 2,600 2,400 77 75 72 69 66 63 67 65 63 60 57 55 77 75 72 69 66 63 67 65 63 60 57 55 ASSOCIATED CONDITIONS: POWER TAKEOFF POWER SET BEFORE BRAKE RELEASE FLAPS 20° RUNWAY PAVED, LEVEL, DRY SURFACE TAKEOFF SPEED IAS AS TABULATED NOTE: GROUND ROLL IS APPROX 73% OF TOTAL TAKEOFF DISTANCE OVER A 50 FT OBSTACLE EXAMPLE: OAT 75 °F PRESSURE ALTITUDE 4,000 FT TAKEOFF WEIGHT 3,100 LB HEADWIND 20 KNOTS TOTAL TAKEOFF DISTANCE OVER A 50 FT OBSTACLE 1,350 FT GROUND ROLL (73% OF 1,350) 986 FT IAS TAKEOFF SPEED LIFT-OFF 74 MPH AT 50 FT 74 MPH