At the risk of mucking up the works, How about a product called Smart
 Drive,
 which would be mounted behind the flywheel. This stator and magnet
 combination can produce way more power than needed and could be used as a
 starter if drive circuitry were to be designed.  The u-tube guy had
 rewired
 the drive for 12 volts and can get hundreds of amps or can leave wired
 polyphase for hundreds of volts.  I suggest using some circuits for


Its already been done, I think it's VW Germany, but most if not all the
cars that stop the engine ( for instance at the lights) stop the engine,
then as soon as the accellerator is pressed the engine starts, and one
drives off!! no wasted fuel in traffic jams, don't know how it goes on a
blistering hot day! Siemens I think have electric disc brakes, stepper
motor drives a wedge style of thing behind the pads and its controlled
by the brake ecu, apparently stopping distance is reduced I wonder about
the safety when all electrical power is lost, no brakes!!
   John Burey


Yes, it has been done since 1935 (by Siba in Germany), it was called
Dynastart.
It was used on BMW 600, Isetta, Heinkel Kabine, NSU Prinz, Goggomobil,
Messerschmitt Kabinenroller, P70.
Similar systems are still used in a number of mopeds.
Current incarnation:

http://www.zf.com/corporate/en/products/product_range/cars/driveline_components/dynastart/dynastart.html
Ecology (madness) gave the idea new momentum, to my surprise it really
worked on our rented BMW,
once we got used to it and stopped restarting the engine manually on
every traffic light ;)
The trigger for restarting seems to be a combination of clutch & gear
actuation ...
Bye,
Adam Ziemkiewicz


Thanks Adam and John,


I was aware that this has/is being done, my daughters hybrid Civic is
another case.  My reason for asking is to put three systems (starter,
alternator, and simplified ignition (from another post) into one assembly to
hopefully simplify and reduce weight. I have looked at wheel motors and have
a quote of around $14,000 for one from a sunny racer that is light weight.
AAAGH!!

So - are there any systems out there that are ok for weight at <15lbs and
may be affordable??

Dan F

I don't see the use for stand alone rotary ignition systems other than to act
as a source for 12 V juice. Same as an alternator would.

Paul Lamar