We broke the track record!! 229.34mph 2.9730 seconds

[McDoodle]

Thanks for that gdurban/images/boards/smilies/smile.gif

 

[davet]

It is a scaled speed. You take track length and divide by your time, which gives you feet/sec. Then divide by 5280 to convert feet to miles. Then multiply by 3600 to convert seconds to hours. Finally, there is a car scale factor in the race software. It defaults to something like 25 to 1.

So, on a 42 ft track and a 3 second finish time and 25:1 scale, you get 238.63 mph.

For your race, the actual race distance could be less than 42 ft because start and finish are set in from ends.

Assuming 2 feet shorter: (40 ft/2.973 sec)*(3600/5280)*25 = 229.336 mph....BINGO!

You guys are way better than I am at math. This made my eyes hurt. I just look to see where we place.

 

[DURASPANK]

My grand kid sure liked seeing that MPH number.

 

[gdurban]

Thanks for that gdurban/images/boards/smilies/smile.gif

Sure thing. By the way, ditch the x25 to get the true average speed around 9 mph. I remember a post saying max speeds at bottom of incline in the 14 mph range but don't quote me.....

 

[gdurban]

With 48 inch ramp height, max velocity at bottom of ramp with no friction would be 10.935 mph.
With friction, the max speed is something like 10.6 mph.