Most guys just trust their regular paper air filter. The metal screen safety filters that I have read about recommend 25 micron or 400 mesh. I think about 100 square inches would be adequate, but have a replacement filter ready since cleaning the fine filter screen can take some time and effort.
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thanks for the information Bruce
Thierry
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Hello everyone
I built this automixer for my truck.
I think it’s different from other automixers.
the transfer of the movement does this by a hinge in place of the longitudinal displacement of an axis
this design facilitates sealing and minimizes mechanical losses caused by friction
What do you think?
Thierry
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Sounds interesting…
The video link doesn’t work.
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Try again, I fixed it!
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Excellent solution!
That should make things a lot easier.
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Hi Thierry,
Thanks for sharing the idea and video, but I don’t understand what I’m looking at. How about a sketch? I can imagine a hinge fastened to the diaphragm, but don’t understand how you are sealing the output rod.
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Excuse me time for the answer, I am very busy at this time of the year
Bruse here is what I use to seal
Another advantage of this automixer design is that it can also work horizontally
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Thank you for taking the time to answer. Very Clever.
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Hello everyone
I would like to replace my big 5 "cyclone with two small cyclones in parallel.
Or can I find the information to size cyclones of equivalent efficiency?
Thank , Thierry
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I think l used 2 4" cyclones on my mb, worked well. Oh, that was paralell!
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Dyson uses a huge array of smaller cyclones in their vacuums. They take their engineering pretty seriously so I don’t think the cyclone arrangement is an accident.
The motivation could be more compact packaging but I think it has more to do with smaller cyclones having higher accelerations to help with separation efficiency. Now that I think about it… I’m sure there is plenty of academic literature on the subject.
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Sounds interesting. Hoping to see more info about Dyson projects.
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I think the Dyson design is efficient enough to remove smoke from air, but the bottom line is it does so with a major consumption of power. In a gasifier system that will amount to a big pressure drop, which will rob significantly from engine power. With a super charger that could be overcome.
But, in engineering there’s such a thing as “too good”, and I suspect this is one example. Max has described a sound system utilizing reheating and a final paper filter to minimize pressure drops.
Steve has theorized that turbulence causes CO to revert to carbon black. A Dyson would certainly put that to the test…
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Well, they seems to be closed on perfecting it. Removing the smoke from air is a huge step already.
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I use a Dyson cyclone canister with my inline filter pipe before the engine just to see what can be stopped from going into the engine and i have some very fine soot/charcoal fines in the bottom .it was a pain to make it air tight as my engine does not have the suction needed to complete the sealing between the container and the cyclones , so in the end i used silicon over every joint
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Hi Garry
I am thinking of replacing my 5 "cyclone with 3 3 "cyclones in order to improve gas filtration without increasing the pressure drop of the system.
Is it a bad idea? 
The cyclones would be downstream of an oil bath filter and a safety filter
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I’m far from an engineer, but it sounds like you are probably on the right track.
I guess the proof will be to try to verify, and report back to the group.
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Dave,
Please remind me. What are you using for a filter before the Dyson cyclone?
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I have the gas outlet on top of the 55 gallon drum from there it goes to a fire extinguisher cyclone and then into a 8 inch dia pipe that is about 3ft tall filled with lambs wool and foam filters and then onto a small inline pool filter and or the Dyson filter before the engine .
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