Greg Farris wrote:

In article ,
says...


Assuming just one magneto with an impulse coupling, the other magneto is
shorted and the starter is engaged (by electrical relay, generally...I'm not
aware of any airplane starter that runs the current straight through the mag
switch).

Note also that this is true only of systems that use an impulse coupling for
starting.

Of course, you could have just posted that information, rather than turning
into a pop-quiz.

Pete




What's the logic of grounding the non impulse-coupled mag during
starting?
(Not a "pop quiz" - I'd like to know).

G Faris



The non-impulse magneto will fire earlier, if at all, and it may
back-fire the engine, as the cranking speed is slow.

--

Tauno Voipio
tauno voipio (at) iki fi