NAVWEPS OD4OT-80 
APPLICATION OF AERODYNAMICS 
I 
TO SPECIFIC PRO&EMS OF FLYING 
NORMAL FORCE 
COEFFICIENT 
OF 
FRICTION 0.6 
F/N 0.4 
0.2 - 
ROLLING 
WHEEL \ 
DRY CONCRETE 
--CONCRETE 
\- 
\ \ LIGHT RAIN 
\ 
\ 
HEAVY RAIN 
I i- LOCKED 
WHEEL 
IO 20 30 40 50 60 70 80 90 100 
PER CENT SLIP 
I 
Figure 6.7 1. Braking Perhnance 
389