This is the straight math formula -
SCALE TANK SPEED CALCULATIONS
By “llrdhsktr” a.k.a. Lester Leong
25 / ( ( ( X / 16 ) 5280 ) / 3600 )
(x) is the actual speed of the tank you are testing for
Example: Pershing - Max Road speed 25 mph
25 divided by 16 ( 16 represents the scale reduction)
That amount times 5280 (5280 is how many feet in a statute mile)
That amount divided by 3600 (3600 is how many seconds in hour)
That amount divided by 25 (25 is the length of the course in feet)
The final calculation should be 10.91 seconds over a 25 foot course.
[Note: RCACN currently gives a 2 mph waver on scale speed so the Pershing
can make it in stock form and make it easier for others to be in limits.]
There is a table that goes with the speed appendix it has all the speeds calculated out already.
Actual speed (real tank speed-RTS), time in seconds over a 25 foot course for 1/16 scale speed.
RTS seconds (1/16 scale, 25 foot test)
Miles
per
Hour10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
elapsed
time in
Seconds27.27
24.79
22.73
20.98
19.48
18.18
17.05
16.04
15.15
14.35
13.64
12.99
12.40
11.86
11.36
10.49
10.10
9.74
9.40
9.09
8.80
8.52
8.26
8.02
7.79
7.58
7.37
7.18
6.99
6.82
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