NAVWEPS O&601-80 
AIRPLANE PERFORMANCE 
FORCES ACTING ON THE AIRPLANE DURING 
TAKEOFF ROLL 
LlFT,L7 
/’ 
,-THRUST (PROPELLER), T ,/ 
/ 
THRUST (JETI,T / 
/’ ‘\ 
(T-D-F) / ‘1 
NET 
ACCELERATING /’ 
FORCE 
(PROPELLER)- , I ’ 
(T;&F) 
CONSTANT 
a 1 
ACCELERATING 
INNING WHICH IS ESSENTIALLY POINT OFF 
OF TAKEOFF PROPORTIONAL TO DISTANCE TAKEOFF 
ROLL IN UNIFORMLY ACCELERATED 
MOTION 
Figure 2.32. Forces Acting on the Airplane During Takeoff Roll 
186