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Post by talltuk on Jan 12, 2014 13:07:34 GMT -8
Hi folks. Can anyone help me out with the maths here? I want to cast the p channel next to the feed using a piece of wood cut to size but have no idea how to convert 5% of the csa into a four sided shape. 5% of the csa of 150mm pipe is 88mm I think going by (pi)(radius squared). Anyone got anbidea how to vert this into a nice thin rectangle?
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Post by peterberg on Jan 12, 2014 13:40:18 GMT -8
As far as I know, 6" is about the same as 150 mm. So what do you mean: 6" = 150 mm or 4" = 100 mm?
I would say when the J-tube duct is round, the p-channel should be a segment, not a rectangle. Honestly, I don't know how to calculate that.
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Post by talltuk on Jan 12, 2014 15:12:45 GMT -8
Oooh dear. Ok will go with the standard of just sticking a plate down the round. Its a 150mm system so 5% of the CSA was 88mm squared.
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Post by pinhead on Jan 13, 2014 6:15:43 GMT -8
Here's what I did with my first rocket stove. I used furnace cement and vermiculite between the 6" and 8" Tee's. |
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Post by pinhead on Jan 13, 2014 6:18:05 GMT -8
And here it is all put together. Note that the P-channel air is drawn in through the "front" of the Tee, air is fed around the inlet of the feed - which helps cool the inlet to prevent fire-creep - and then fed at the roof of the J-tube. This method was extremely effective. I never had any trouble with warping - as the incoming air kept the flame away from the P-channel. Attachments:
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Post by talltuk on Jan 13, 2014 12:07:17 GMT -8
Very nice pin. Will remember that when I get metal working stuff
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