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Tach Attack



 
 
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Old August 11th 09, 02:55 PM posted to rec.aviation.homebuilt
Peter Dohm
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Posts: 1,754
Default Tach Attack


"brian whatcott" wrote in message
...
Peter Dohm wrote:
"brian whatcott" wrote in message
...
Philippe wrote:
...
I also use the magnets for CDI electronic ignition. no more magnetos,
no more cable for tach, no more copper tube for oil pressure... By
Not sure if this is what you mean, but a few high energy magnets
spinning on a plate do a great job producing pulses in a few coils
spaced close to the spinning magnets.

Seems like you could easily arrange two sets of coils to provide a
double source for a CD ignition, as well as timing it....
Or perhaps more compact, a source (if rectified and smoothed)
for one of those electronic ignition modules that fit inside the car
distributor, these days....

Either way that really amounts to a magneto I suppose - but so few
components, and double redundant so no battery would be involved.....

Brian W


I admit that I don't recall who manufactures and sells them; but I seem
to recall that Steve Wittman used a "self sufficient distributor" fitting
that description, as part of his V8 conversion for the Tailwind, at least
25 years ago.

Peter



Something that fits in the distributor hole and looks like a distributor,
with no battery lead however, is the VW type magneto.
Kinda expensive, and sticks up on a VW cowl, but does the job.

Kinda like the Wittman approach??

Brian W


I believe so.

Peter


 




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