steam4ian
Elder Statesman
One good turn deserves another
Posts: 2,069
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Post by steam4ian on Feb 21, 2008 8:50:59 GMT
G'day all
Methinks Fred, Graham or both doth protest too much.
Enough carping now to be constructive. I quote "It would be considerably more constructive to have a solution, endorsed by manufacturers, and published by the well known model making journals" Maybe it is up to either Fred or Graham to research the issue and get us all enlightened.
I note in his previous post he alluded to a vapouriser for liquefied gas used to fire 5" loco.
To safely use liquid gas a vapouriser is essential together with control valves sized and located to control liquid flows not mixed liquid/gas flows.
Just this day I read an article from the Energy authority of Victoria Australia regarding an incident when a gas flame flared when supplied by liquid, a cylinder had fallen on its side. It was "grim reaper" warning.
If you don't know what you are doing, don't do it1
Regards and long life to all Ian
so that we can all avoid your 'grim reaper' for as long as possible.
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jamespetts
Hi-poster
Closet eccentric. Also bakes cakes.
Posts: 185
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Post by jamespetts on Feb 22, 2008 0:26:58 GMT
Thank you for all your replies - it seems that my simple question has provoked a heated debate! It does seem that attempting to use liquid butane/propane (I hate to use the oxymoron, "liquid gas") is rather too difficult for my somewhat limited model engineering skills, so I shall stick to the original idea, as suggested by Appleton, which is to run the exhaust steam pipe under the cylinder.
Appleton evidently has experience of doing that, and of it being safe and successful, and even my limited abilities should suffice to be able to get that set up. As to the original problem about the flame, I have purchased a new jet, which I have not enlarged (for the princely sum of £2.85, plus postage), and will test it this week-end.
The one question that remains about warming the gas cylinder is whether to insulate the space underneath the wooden retainers that I have installed to elevate the cylinder above the exhaust pipe, such that the heat from the exhaust pipe is trapped under the cylinder and heats it more effectively, or whether it would heat it sufficiently if the warm air was allowed to escape freely from the sides. If it is of relevance, the gas cannister states that it should not be exposed to temperatures in excess of 50C.
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jamespetts
Hi-poster
Closet eccentric. Also bakes cakes.
Posts: 185
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Post by jamespetts on Feb 23, 2008 18:08:17 GMT
Update: I tried the new jet this week-end: worked very well. I had a blue flame, those little blue cones, and much more heat. Thank you all for your advice :-)
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