Good Morning (depends on which part of the world you are ),
Koen, thanks for your long reply.
I’m sorry, but I think you are mistaken here and I would join Kristijan’s statement. And it matches very well with the cross section of the Mako in the swedish gengas book.
Yes, this is for sure a better approach. If you can guarantee good quality char, I’m absolutely with you.
But if you are traveling around and have to rely on different fuel sources, this may be a problem. This is why downdraft charcoal gasifiers were almost exclusively used in Sweden in WW2, except from the Källe. And today, just think of a bag of BBQ charcoal, which is not engine grade.
This is very interesting and for sure practical experience that I’m missing so far.
Kristijan, I really like your Seat gasifier. It should for sure be possible to upscale it for the MB.
If you go for a cross-draft, I for myself find the Gohin-Poulenc very inspiring, both gasifier and the filter design. Quite compact and simple. It was very popular in France.
For sure you know this thread: Gohin Poulenc
And there is a french web-site with more information and pictures: http://gazogenes.free.fr/tuyere_refroidissement_eau.html
There is an interesting nozzle design with two different cross section for the air entry, making it kind of adjustable to the suction load of the engine. In a book from Switzerland I found a drawing of a moveable nozzle. I don’t have it here, but will look it up later at home.
The only disadvantage that I have read often about cross-drafts are slag formation and fairly high pressure drop.
Hope that helped a bit and I dindn’t wrote just things you all already know.
And Kristijan, hope your eye will be soon OK again! Be careful with eyes and ears, they don’t grow again once lost! I was also a bit careless in the past with that, but I can feel the first problems with my ears now. Not too bad, but enough to be an alarming sign for me.