AxA
Jabawocky,
I'm curious about this. Where does the delay between the opening of the points and the firing of the spark come from?
Current in the primary windings continuing to flow after point opening as the capacitor across the points charges?
Time for the field in the coil to collapse, producing the current in the secondary winding?
Something else?
Creamie has answered that already, but in addition to what he has described, there are subtle differences from some mag setups to others. On the Turbo 540 there are two kinds of magneto drives. Static timing can be set the same, the actual spark plug firing is a couple of degrees different.
In addition the spark firing moves quite a bit from one combustion event to the next. There is a bunch of dynamic stuff going on all the time including an amazing amount of crankshaft torsionals that are mind boggling when you see the data. This all adds up, and some of the effect is from the cycle to cycle variability of which there are about 20 per second.
Most of the variation is in the mechanicals before the points even get opened, but there is some variation there after as well.
All of this is challenging to the mind. And of course it does not really exist if you do not have the ability to measure it. But when you do....a whole new world of understanding erupts. All this good data is clearly stuff yr right knew but has forgotten. But it can be learned again!
