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Dual Fuel Gingery Type Furnace

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inthesticks:
Didn't do much today, should have been out cutting 5 acres of lawn but still to wet to cut grass, so puttered around in the shop instead. Built a transition piece for the burner fan, built a rough and dirty manometer to check static press. The first picture is the set up. The second picture is the manometer with imput connected but fan off. The third picture is the manometer with fan on and outlet plugged. the reading is the total difference between the two legs, I get roughly 3.1-3.2" water column which is plenty for propane. We will have to see how it handles oil. I can gain a bit sealing the transition piece but not much.

PS: Very humid day today after that rain, reading will also improve some on a less humid day.

Cheers
CB

inthesticks:
This wet weather persists, haven't got outside to hang oil tank but I got it painted up, installed a valve on the outlet so I can disconnect hose for storage. The hose is 24' of one half of an old oxy-acetylene hose I had. I installed quik connectors at both ends for conveniance and so I am not dripping oil all over the place when storing hose.The other item in the picture is the pulley assembly for hanging the tank, maybe tomorrow.

Working on the dual burner maybe done today.

Cheers
CB

Homebrewer:
That looks great!

Could you do a separate, quick thread on the mamometer perhaps?  I'm sure a couple of us are a little curious about that as well.

inthesticks:
Thanks for your interest LibbyHillBrewer. The manometer I put together is pretty rough, I just wanted to verify I was in the ballpark on this fan. If I build a proper one in the future I will certainly do a write up on it. In the meantime if your interested I made up a PDF which is  from D. Gingery's book "How To Design @ Build Centrifugal Fans For The Home Shop". It will show you how to build one and explain the readings.

Cheers
CB

inthesticks:
Well I did manage to finish the dual fuel burner today. The design is virtually the same as Lionel Oliver's "Hot Shot"(1st picture). Mine is one size larger 1 1/4" instead of 1" burner pipe he also used 1/8" black iron pipe for oil injection I used 1/4" brake line tube, and total length is about 3" longer. In a later version he extends the oil pipe to the end of the burner pipe which I did here. I did not have a 2" nipple long enough for the blower pipe and my pipe dies stop at 1 1/2" so I welded 1/2 a close nipple to the end of a 2" pipe. Hey!! it worked :clap:. I resisted welding the oil delivery pipe to the blower pipe, threading it instead so that if I need to make changes in the future, it can all be dismantled. Both oil and gas have needle valves for positive control and quik connect fittings.

Cheers Modders  :beer:
CB

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