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That is certainly a point - how I b*gg*r*d up my logic there! Thanks

Oh damn! I forgot to mention that in the formula l = the length of the flue. Sorry!

As the attached file shows, I have (after finding on old A-level textbook and researching resonance) tried to look at the theory behind a Reynst pot's flue. However, I do not know how to take account of the changes in the temperature of the working fluid and therefore optimise it. I can see that the...

Thank you for your swift reply; I shall look at the "Off Topic" forum in more detail (I thought it was more of a social nature). Thanks for the link, but I am already a Wikipedia addict and it was my first port of call. Also, sorry if I offended you by suggesting that it was mainly hobbyists - you s...

As this post is my first, it may seem impertinent that I have a suggestion; and of course I do not wish to antagonise any of the more experienced members. However, through my browsing (approximately a month) I notice there is no forum dedicated to theory, and perhaps weirdly, I am interested in the ...