[Gasification] Push or pull

[gasman]

Best Douglas!

It has been said in the past many times, and it still holds, that the motor cooling should be  separately driven by a separate "turbine wheel" in the opposite end of the motor.

The "snail" enclosure around the working turbine wheel should be airtight to the surrounding, thus leakfree and without an imminent danger of igniteing a possible mix of gas and air. So, if that mixture should reach the sparking brushes at the commutator. The motor being an all-current motor is easy to regulate.
The motor likes clean air for cooling--not tar-laden start-up gas!
One can use a good ventilator for injecting the startflame into the gasifier hearth, by doing a small firebox attatched to the air-intake and and an appropriate injecting nozzle to suck in the flame.

This works much better, if one makes a special start-up tube into the hearth, slightly higher than the normal nozzles. This tube would preferably be 1 1/4" in diameter for good blasting into the charcoal, with the roaring air-beam, sucking in the flame...

Good luck!

Max