> As it happens I am a time served machinist.
Hi, Roger. Didn't know. Way cool. Almost your civic duty to experiment then. :)
What would be really cool would be a Ti Borde Bomb. Just as soon as I win the lottery, I'll finance one. Sigh. Why aren't any Saudi Arabian princes ultralighters? Oh, for their cast offs! :)
The stoves that I've seen that look interesting are alcohol jet stoves. The lower section of the stove houses a flame that heats the upper section. The upper section holds the main alcohol supply. The heated alcohol produces a good deal of vapor pressure which shoots out a jet whereupon it is ignited and burned. Probably not the lightest possible arrangement, but perhaps the jet would burn more fuel per second than other non or less pressurized alcohol stoves and therefore provide more heat in a shorter period of time. In winter, perhaps such a stove could be used to melt snow. One of the main drawbacks to an alcohol stove in winter is its painfully slow rate of melting snow for water. Most people abandon their alcohol stoves and switch to either an inverted canister (or other liquid feed LPG stove) or white gas stove. Perhaps an alcohol jet stove could extend the temperature range in which an alcohol stove would be practical to use.
Most of the alcohol jet stoves I've seen have been sort of tall, spindly affairs made from 12 fl oz (355 ml) aluminum beverage cans which are not stable. Something made from wider, shorter aluminum containers might fit the bill better.
The lower half of the stove could be constructed from something with a fairly light gauge, such as an aluminum cat food can,
but the upper portion would need to be a of a bit heavier gauge material in order for it to reliably contain the pressure. Perhaps an empty 170g Powermax fuel container could be used for such a purpose.
Anyway, just some thoughts.