The battery has arrived 4200 4s LiFe I calculate it should be able to deliver over 120amps It may be a little large for 4 drill motors!! But better to be a little over specification


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This is a mock-up of the proposed transmission with the motors and the ratio the theoretical torque is a little over 120Nm each wheel! The speed about 150rpm giving a speed of over 8.5mph This is a bit faster than the old Seraph.



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