Author Topic: Dana Hall's Super-Duper Fan!  (Read 5502 times)

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ahowell

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Dana Hall's Super-Duper Fan!
« on: January 06, 2010, 05:37:18 PM »
From an e-mail he sent me:

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My name is Dana Hall and I am in Florida...

I would like to pass on my condolences as to the passing of Jerry...
I never met him, but we exchanged a number of emails, and he was always very prompt with his replies back to me... And his knowledge on the engines he designed is very impressive...

A while back I built Jerry's Super stirling engine and it works beautifully... Then I thought I would build another fan but doubling all of the engine dimensions times 2...

The pictures are deceiving as to the size of the fan... The blade diameter is 18 inches and from the bottom to the top of the fan blades is 31.5 inches... It has a maximum rpm of 245 and runs quite nicely on a .5 inch tall flame... The base stand for the engine is my own design...

Enclosed are 2 pictures of the fan...
I thought you might like to see them...

I would like to thank you for keeping Jerry's web site and business going...
His plans and engine designs are by far the best on the Internet market...

Dana Hall

« Last Edit: February 22, 2010, 07:39:52 PM by ahowell »

Mark Howell

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Re: Dana Hall's Super-Duper Fan!
« Reply #1 on: January 21, 2010, 05:26:10 PM »
I'm working on a 1.5x scale of the fan, so we'll see how that goes.

kqa3637

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Re: Dana Hall's Super-Duper Fan!
« Reply #2 on: January 22, 2010, 03:40:28 PM »
I thought about 1.5 times but for whatever reason I went with 2 times the size...
You should get somewhere in the area of around 330 maximum rpm's... I found that building the fan larger was a very interesting project... Even though I doubled the size of the engine, in theory it has 4 times the power... I had to modify the base to get the flame the proper distance from the hotcap and also not to make the fan too tall...

Hope it goes well for you...
Keep us in touch with how the building of the fan goes...
If I can answer any questions for you, let me know...
Dana
« Last Edit: January 22, 2010, 09:23:51 PM by kqa3637 »

Mark Howell

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Re: Dana Hall's Super-Duper Fan!
« Reply #3 on: February 06, 2010, 01:24:22 PM »
Was tapping the bottom of the displacer cylinder for the hot cap bolts and broke a tap.  It's deep inside and I can't get it out. I figure I'll get by with three bolts instead of four.  I'll change it so they are laid out like a triangle so I can get even pressure bolting the hot cap on.  What do you think?

kqa3637

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Re: Dana Hall's Super-Duper Fan!
« Reply #4 on: February 07, 2010, 08:10:44 PM »
Hi Mark...
Sorry for the late reply... Been away for a week...
Sorry to hear about the broken tap... Can be really frustrating when that happens...
You should be ok none the less with 3 equally spaced screws...
Dana
« Last Edit: February 07, 2010, 08:49:58 PM by kqa3637 »