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Old 02-04-2008, 10:30 PM   #22 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,642

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.78 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 66.29 mpg (US)
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There's a schematic for the C-Car contactor controller here:

http://autos.groups.yahoo.com/group/C-Car/files/

You may need to register to gain access.

In a nutshell, a contactor controller is a number of switches and (usually) a big fat resistor. In the C-Cars, there are 3 stages in the setup: 1st speed is 24v through a resistor for creeping; 2nd speed is straight 24v (no resistor); 3rd speed is straight 48v.

Check this vid for an example of one in action.

@ about 1:50 he engages the 1st stage

@ about 1:56 he engages the 2nd stage

@ about 1:57 he goes straight for the 3rd stage

And he has a bunch of fun doing it over and over!

@ about 4:40 he gets lined up to go direct-to-4th stage from stopped ... and lights up the tires! It's a goofy but fun vid to watch...

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