Yet another electric conversion

[ziggy12345]

1st gear gearing will be to 90 mph. I will change the internal gearing in the car so the motor will rev to 30,000 before changing to 2nd. 2nd will be geared to 165mph at 40,000 rpm.

The MGM 250 will run from 4-15 Lipo cells and will handle 360 amp burst so 6 cells no problem

The KOKAM 3S 4100 MAH cells deliver constant 150 amps each for 4 mins. These are tested prior to shipping.

Connections are 3 x 6mm 200 amp gold plated connectors with 6mm square wire each phase.

The reason for the 2 speed mechanical gearbox is that I can fry the motor if I apply too much throttle before the motor spins up. The motor is 92mm long and 60mm diameter so the same as 1/2 a can of Red Bull. The 2250 is 40mm diameter and same length so not much in it.

The Evolva drive shafts have been upgraded to sping steel and hardened and tempered myself. The belts are carbon fibre and metal pulleys all round.

The real problem I have is seeing the car when it starts it run as the run up is 1200ft and the car staying on the ground. Nic case recently ran 173mph and the next run went through the trap at 177mph 5ft off the ground. He is preparing for his 200mph run next month.

I'll post some photos when I get back to the UK and start the build

Cheers

[RC-Monster Mike]

Originally Posted by ziggy12345

The KOKAM 3S 4100 MAH cells deliver constant 150 amps each for 4 mins. These are tested prior to shipping.

Cheers

Who did the testing? Math doesn't lie. In order for any battery of any capacity to deliver constant current for 4 minutes, the maximum continuous discharge rate would be 15c - and this assumes you would actually get full capacity at 15c discharge, which isn't likely. 15c on a 4100mah battery is 61.5 amps. Maybe they can discharge at 150 amps, but they can't do it for 4 minutes straight unless somebody found perpetual energy and used this amazing discovery in these cells! If the cells deliver full capacity at 150 amps, they could only do so for 1.64 minutes before they were completely discharged.
Cool project, though and I look forward to its completion. :)