SCALE TANK SPEED CALCULATIONS

By “llrdhsktr” a.k.a. Lester Leong

 

This is the straight math formula -

      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
Hour
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
elapsed
time in
Seconds
27.27 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 10.91 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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