OMG!! First welcome to the group. Unusual for some one to come here AFTER building a working gasifier. I say OMG because it seems to some of you newer guys you don’t understand that the number of nozzles, dia. of nozzle openings, and dia of fire tub, etc etc all have an affect and have to be in balance. This balance is in old WWII books. And yet, you jump into this with One continuous nozzle and it doesn’t appear that you designed it for a specific engine— you just broke all the rules that I have studied years trying to make sense out of— and yet yours works (and appears to work quite well) Congratulations!!!
As far as the color of your flame and size etc. I have had my build at the point where it ran my truck but would NOT flare, so I don’t know much about colors etc. I end up hooking them up to my engine and trying them. ( I have gummed up 3 engines valve trains with my wonderful method.) My one comment would be after it has run for a while and the gasifier seems stabilized, blow the flame out and put a piece of white cloth over the pipe while still running. Look to see how much black tar/soot stick to the rag. ( experience has proven that using your white handkerchief can get you in trouble with your wash lady)
One other comment, I don’t know why you hesitate to use a light dimmer to control your shop vac. I have been using them for years and I think are important (remember I hardly ever get a flare ) because you need your gasifier to work for the engine size you are going to use, so by slowing down and speeding up the vacuum you will get a better idea of the size engine your gasifier will work best with. Make a simple manometer using a board with a yard stick and a piece of plastic tubing. ( very cheap, easy to build, and very accurate) Again Congratulations. TomC
I see your welder sitting out side and it makes me wonder how you have been able to build this in the last three months. I have spent the last three months in the house by the fire. I admit WE have gone through a long spell of sub zero weather and I heard on the news that Alaska has had the warmest winter on record — your warmest is still lower than our coldest.