Again glow-plug electric starting has been tried by many here.
Me too. Struggled with this for 3-4 design changes for a year helping out one fellow.
It only works a small percentage of the time.
The problem is not the glow plug energy. It is the one-place location.
The very best learned knowledge promoted here on the DOW is that wood-for-power is only 25% the actual nuts and bolts system; but 75% a working operator experiences MAKING a system work.
And work every time, all of the time under widely variable states of conditions.
Direct exprence is how the ending state, remaining needed char bed from the previous usage IS was determined by just how the operator ending the last use session.
At that one-point glow-plug location will only be just so much charcoal. Or space hollowed - no direct contact charcoal at all. Or a non-combustible ash clog. Or an impermeable wad of tars-goo/ash collected. Etc. Etc. Etc.
An experienced operator can, and will perceive all of these and force a make-work.
Poke clear. Rod down from the top settle-in.
From the top down burrow-lite.
From below the grate up, lite.
I learned to screw all of the no-sense slow liting up with too many cold tars being made.
Oxyacetylene torch force lite thru that single point liting port works 100% of the time. Super hot. The hot flame carries clear across the restriction area. Super quick.
Oxyacetylene burns with least amount of combustion moisture.
I am still working on the same tank fills in my back-pac portable set after 10+ years and hundreds and hundreds of lite-ups.
Single bottle MAP gas works ok. Slower. Less across bed penetration. And more liting-gas combustion moisture.
Another experience learned quick starting wisdom is to use lots and lots of sucking, or blowing, air-watts power for starting up.
Less than ~1000 air-watts and your slow, slow up to all zones operating temperatures will tars-make coat and clog your downstream systems.
The gasifier hearth is only maybe, 20% of a needed complete you will need to evolve into for IC engine fuel making.
Read. Study the actual being worked systems here on the DOW to see the why’s of all of this.
Read past the speculators; the I heard’s; and the better-idea talkers.
Proof of merit is always hundreds of hours of year around Using’s. Carving off all of the froo-froo woo-woo’s. Adding only, and keeping only, what is truly beneficial.