The 250mph came from the estimate of 2500 rpm with unmodified motors. I
plan on adjusting the timing of the motors, and then overvolting them
to 36 volts. Thats how I estimate 3000rpm.. so its going atleast 250mph
(for 2500), or more if I make the changes. The gearbox uses 2:1
reduction, so the motors are spinning at 5000 normally, and should add
another 1000 with modifications. You are very right, 3000 rpm is
321mph.. would you like your gold star?

I don't know why I have to prove anything to you guys. This is a metal
working group, I expected answers regarding the metals to use. You
would be surpised at how much this stuff costs. I can show you a whole
list of parts we have to add up to $7k.. we have $2500 in motors (5hp
electric motors aren't cheap, neither are 1hp, 1 pound motors), the 8
batteries we have won't be enough, and they ran $1100. Oh, and the
$1500 control system, + all the controller for each motor ($150-$200)
each and we have six... thats just a bit of it.

I posted our website, hhsrobotics.com, if you want to go there and see
our 5+ years of Robotics history.

I'm sorry if I am not up for using a car leaf spring as a weapon. I am
looking for raw metals that can be obtained easily, and worked with
easily. The robot design is fully CAD drawn, and will be made with a
high level of precision.. We take more of a NASA approach to this kind
of stuff.. not redneck backyard fun. Yeehaw.