Edited by Haiqing on 07/03/2009 09:48:15 MDT.

The spring is a nice idea to hold the windshield against the pan, but I think you should add a spacer to hold the windshield away from the pan. This will allow the flame to rise up the side of the pan, increasing efficiency.

With the current design, the only place for the hot gas to escape is through the opening, so the side of the pan isn't heated.

Also, since the burner is above the bottom of the windshield, it will be operating in exhaust gas, so it is likely to produce more CO than normal.

Yes friend,you're right,I found the problem.
I will make more hole,or try to cut it shorter.
:)

I like the idea! Perhaps you could just run the spring around the circumference of the pot, inside the windscreen... that would hold the screen slightly away from the side of the pot, but still hold good tension...

> Perhaps you could just run the spring around the circumference of the pot, inside the windscreen... that would hold the screen slightly away from the side of the pot, but still hold good tension...

That's exactly the idea I had over the weekend. My only worry is that heating the spring will anneal it, so losing its spring...

Haiqing, adding holes will just allow the hot gas to escape outside the windscreen. This is not good, as the heat will be wasted. What you need to do is make a gap between the windshield and the pan, that allows the hot gas to escape from below the pan, but stay close to the pan so that it continues to heat it.

Have a look at my Squeezebox Stove for an example.

ps. is your name really Haiqing? It's just that, in UK English, we use the word 'hiking' to mean 'backpacking'. A lucky coincidence that your name sounds the same as our word 'hiking' :-) On reflection, I think Chinese 'qi' may be pronounced as English 'chee'. Oh the troubles with transliterations...

Yes I see the pictures,that's a good idea!
and,
Yes my name is "Haiqing","hai"and "qing"is two character in Chinese.
and"Qiu"is my family name
:)

Edited by Haiqing on 07/08/2009 01:13:10 MDT.