Cincinnati Shaper

[dallen]

Our older backs are telling us something Dave.......

Mines been telling me for years that I need to let them cut on it, but thats not going to happen as long as I can walk hurting or not, the knife, unlike what they want you to believe does not cure all

[Rasper]

Dave,
I would love to have those blower numbers.

Thanks

Richard

[dallen]

Dave,
I would love to have those blower numbers.

Thanks

Richard

give me a day or two to find the book ad scan the pages and I'll post them on here for you

DA

[Rasper]

Gingery wrote a book called something close to How to Design and Build centrifugal Blowers. I bought the Kindle edition from Amazon. It is a wealth of information.

You have lots of air flow; it sounds like what you need is more pressure. Bounce house blowers probably aren't designed to produce high pressure. No matter how many cubic feet of air a blower will move, if there is insufficient pressure to push it through your furnace, you are not happy.

Maybe if US Steel hasn't scrapped all of these 4000 HP Allis Chalmers blowers you could find one. It would melt a little iron. If nothing else it would help to entertain the neighbors.



Richard

[dallen]

Gingery wrote a book called something close to How to Design and Build centrifugal Blowers. I bought the Kindle edition from Amazon. It is a wealth of information.

You have lots of air flow; it sounds like what you need is more pressure. Bounce house blowers probably aren't designed to produce high pressure. No matter how many cubic feet of air a blower will move, if there is insufficient pressure to push it through your furnace, you are not happy.

Richard

so far I've only fired the burner twice since i got the house blower, the last time was with a new burner tube that I had made which had the air inlet at about 30 degrees to the tube that fits into the furnace. it worked a lot better then it did the first time I tried it, but I was also having nozzle problems with a leaking o-ring which I changed before the last firing.

The bounce house blower has enough pressure, I just need to do something about the step down in tube diameters. the blower was designed with a 4 inch outlet, so unless I can get a burner tube that large I won't be able to use the full capacity of the blower because of the restriction. Used to have the same problems on Asphalt Plants just that they were bigger, filter bags plug up so that air won't flow you can get any heat..

If you have the Gingery book you probably have the same info whats in Chastians book, Steve gave two widths for the blades in his book.

Whats the Elevation where your at in Mexico, you know you loose about 5 % for every 1000 feet in elevation that you go up.

DA

[mite5255]

Gingery wrote a book called something close to How to Design and Build centrifugal Blowers. I bought the Kindle edition from Amazon. It is a wealth of information.

You have lots of air flow; it sounds like what you need is more pressure. Bounce house blowers probably aren't designed to produce high pressure. No matter how many cubic feet of air a blower will move, if there is insufficient pressure to push it through your furnace, you are not happy.

Maybe if US Steel hasn't scrapped all of these 4000 HP Allis Chalmers blowers you could find one. It would melt a little iron. If nothing else it would help to entertain the neighbors.



Richard

Ohhhhhhh yessssssss lets all entertain our neighbors

[Rasper]

Ohhhhhhh yessssssss lets all entertain our neighbors

If i remember correctly you have a neighbor who this Allis Chalmers blower would be perfect for.

Dave,
I wonder whether those bounce house blowers create enough pressure. They move a lot of air, which would seem to be the major requirement for a bounce house, but pressure is needed to get the air through an oil burning furnace.

Richard

[Jammer]

It's a radial type fan so it should move some air. The only way I could think to check volume of air was to put a 55 gal trash bag over the end and time how long it took to fill it. Those bouncy castles are blown up pretty tight, I realize it doesn't take much pressure to do that due to volume. Just build a Manometer with some platic tubing and see what kind of pressure you get in inches of water column. I'll try to find pictures of the one I built. It got lost in the move.
It will take both pressure and volume to run a large Iron furnace. I don't know what you'll lose taking down from 4" to 2".

[dallen]

It's a radial type fan so it should move some air. The only way I could think to check volume of air was to put a 55 gal trash bag over the end and time how long it took to fill it. Those bouncy castles are blown up pretty tight, I realize it doesn't take much pressure to do that due to volume. Just build a Manometer with some platic tubing and see what kind of pressure you get in inches of water column. I'll try to find pictures of the one I built. It got lost in the move.
It will take both pressure and volume to run a large Iron furnace. I don't know what you'll lose taking down from 4" to 2".

I have a couple manometers around the house from when I worked on Asphalt Plants, one is a electronic one that is really nice as you don't have to fill it up with water and Iodine when makes the old water filled ones easier to read without buying the high dollar dye.

Chastain tells how to make a pitot for measuring air flows, I don't think I need to go that far but I will hook the blower up and see what pressure I have with and without the burner restrictions.

I was thinking about this today (which is dangerous for me to do) about this and did some rough math and I figure that with my 2" pipe burner tube with the 3/4" hex nozzle plus the spin vane in the end of it that I have the open area equal to about 1.5 inch pipe which really cuts the air flow down.

I know one guy that if you was to see his burner you would say that there is no way in hell that it would melt iron but it does, but then his furnace is made out of IFB brick and not heavy castable.

Anyway I hope to do something with it tomorrow if my back doesn't act up like its been doing for the last few days.

DA

[mite5255]

Ohhhhhhh yessssssss lets all entertain our neighbors

If i remember correctly you have a neighbor who this Allis Chalmers blower would be perfect for.



Richard

Correct Richard