I know the guy who built this gasifier. It's his first generation gasifier and is building a better second generation gasifier right now.
Any chance of another you-tube video then? As what he achieved with the first gasifier was well impressive, considering that it was made mostly from items which alot of people would consider to be junk.
From the original You-tube video, judging by the ease of which he is able to restart the engine on the starting handle it is suggestive that the quality of the producer gas being made by the gasifier is also very good. Was this because he was using good quality seasoned hardwoods, or just a very well thought out design.
It looked like on the original video that he had an updraft design, did he have any problems with 'bridging' taking place in the reduction zone of the gasifier, and if so how did he overcome them?
Finally is he still using the Lister HRG2 engine with his new and improved gasifier design?
He has 3 videos of his gasifier in action on his channel: The one posted, and these two:
http://www.youtube.com/watch?v=ciNNtV8sZY4http://www.youtube.com/watch?v=wTCv-jbAH3sHe indeed built it entirely from junk he had laying around.
The gas he made was pretty good, but it had some tar in it and it has since gummed up the valves on that Lister. However, his 2.0 version gasifier should run hotter and have less tar and better gas cleaning capabilities. He experimented with different woods local to us, and the best we can get is actually Poplar.
There's not much here for hardwood.
As for bridging, he had a little stick coming out of the bottom that he could shake to break up the 'bridge'. Version 2.0 has a bit more elegant solution.
He'll probably get his Lister up and running again here this summer once he completes gasifier 2.0.