Time Factors for Speed Differentials 





Miles per
hour = (Gear Development in feet) X (Revolutions per minute) X 0.0114 
GD = (MPH x
88) divided by rpm 

Time to
close gap = Gap in seconds X speed differential factor 

Time gained
in an attack = attack time in seconds divided by speeddifferential factor 


Speed Differentials 


Constant speed (mph) 
1 mph (sec) 
2 mph (sec) 
3 mph (sec) 
4 mph (sec) 
5 mph (sec) 

12 
12 
6 
4 
3 


14 
14 
7 
4.7 
3.5 


16 
16 
8 
5.3 
4 


18 
18 
9 
6 
4.5 


20 
20 
10 
6.7 
5 


22 
22 
11 
7.3 
5.5 


24 
24 
13 
8 
6 


26 
26 
13 
8.7 
6.5 


28 
28 
14 
9.3 
7 


30 
30 
15 
10 
7.5 


32 
32 
16 
10.7 
8 


34 
34 
17 
11.3 
8.5 











