RE: Scratch Built Ignition???
I have used various US made ignitions and a good friend makes one (Al Diem).
Al explained to me how the various ones made in USA operate-and some of the pros and cons.
Iam not versed in this design area.
anyway - his early, simple one used much the same current -at any rpm . later ones use more current and produce more current out of the coil..
Anyway - I have been running various ignitions made overseas -in Czech Republic.
Some are made by Falkon and the others -are not identified.
Here is what seems particularly interesting to me .
ALL use fully shielded plugs -some with machined caps that have nicely cast rubber insulators in them .
One has the high tension lead attached to the spark unit via a Co-axial connector -which is the same as used on my tv - I checked it -it fit.
The advantage is in repair and ability to fit cables and caps for differerent size plugs.
All appear to have a timed out to OFF circuit- to shut down an idle system
One has a built in tattletale which reads out via a small LED -and the two example I now have -work perfectly -
just read the LED by placing a tach in front and the rpm (1/2) appears
4400=8800).
it is very handy. You can read when testing or after a flight.
A feature I would like --is a heat sensor which -perhaps reads the plug base temp - when a preset temp apears,- it could -perhaps cause an intermittant stutter of the engine - letting you know you are running to hot -or hotter than intended.
Isn't there anyone in th USA setup to make some integrated ignitions?
What I now see are nice working units but where is the innovation?
.