(ET) more off topic power wheels jeep help...

["Chapin, Tim" <tchapin umich edu>]

Thanks for all the answers on the 12 volt battery..  The Barbie rat jeep is
now cooking on 18 volts (combo of 12 and 6 volt batteries). High speed up
from 5 mph to around 8 mph Starting to wire a TURBO switch for short burst
of 24 volts.. shooting for over 10 mph (wife hates the idea but hay.... 
more
power)..
At 18 volts I am starting to worry about the plastic gear box holding up.
The kids are doing rev. slams to get it to pull wheelies.  The power wheels
idea of a controller is an on/off switch.  Is there a easy/cheap way to
build a board that would ramp up the volts when the power is sent to the
motors...  Something that might start at 1/3 voltage then jump to 2/3
voltage then full power..  Just something that would ram up the power a
little instead of complete tork at once..  I said easy because I have 
little
electrically experience so I need the kis approach. (keep it simple)

At this point the e12m won't keep up...  Maybe...  No...   Still need the
old girl to mow the lawn....