Stirlingengineforum.com

Plani, that is awesome!!!! This may be far easier than my v twin thinking. I think I am going to try the shorter stroke experiment first to see which is faster. I wish I had some way of measuring power output like fractional horsepower.

Hi, I have a question that I am thinking about and wondering if anyone know the answer before I actually make another fan for a test. So, the ratios that I use, 19.73:1, seems to work the best for me at my temperature range for the most amount of speed to the 10" fan blade. Keeping my piston vo...

Hi, I did more messing around with my Stirling fan last night while on the wood burner. (Yes, my wife thinks that I have lost my mind.) I let the stove heat up to reach 425F on the top surface and achieved 270 rpm, the top of the piston area stayed right around 215F. While it was a fun test, I can't...

Hi Ian, that is a nice fan and would love to see your fan running as well. I'm not sure how you got it to work at 1:1.5. When trying that ratio, I had to have heat in the 600 F range to self sustain. My wood stove just doesn't get that hot.

Hi, great question and glad you asked. The displacer as I mentioned is balsa wood. I ran it without the holes filled with stainless steel wool (solid balsa) initially and only managed about 60-70 rpm. Where it makes a difference is the temperature between the base and the top piston area. I only had...

BTW, this is actually blowing a pretty good amount of air at 240 rpm with a 30 degree pitch 10" fan blade. Also the temperature at the base was 320F and the top of the glass around the piston was 140F so the cooling fins I made and the stainless steel wool in the displacer are really helping ma...

Hi, I used a quart paint can and cut it down to leave it 1" in height. This left a 1/8" gap all around the glass, which was a wine bottle that I cut, and filled that gap all the way down to the bottom with red RTV. I figured that would provide a whopper of a seal and allow flexibility for ...

Made a few minor tweaks and sanded the piston ever so slightly to reduce friction. Now turning over 240 rpm

You tube video
https://www.youtube.com/watch?v=VpGtGc3ojSQ

The piston to displacer volume ratio of 1:2 to 1:5 was driving me insane trying to make this application work correctly. Only when I made the displacer volume way bigger did I finally get this working in the right direction. The ratio I came up with is around 1:16 that worked in my heat range. The d...

Finally!!!!! I got it to work right. Thank you for all the help.

You tube video
https://www.youtube.com/watch?v=Ycrq6UTtkN8

I have been reading a lot on displacer size and stroke on this site. Do you think that increasing the displacer length to 3" and cutting down the stroke to 1" on the displacer piston would make a difference? I guess what I am asking is what can happen if the is more than a 1-1.5 ratio betw...

Hi. I guess I should have mentioned this part. I modeled the stove fan I was making after the Vulcan fan design and I like the way it looks and sits on the woodburner very nicely. I would like to keep my displacer housing size at the 2 1/16. While I really appreciate the advice on changing the displ...

Hi My name is Dave and made my first post here today. Thanks for letting me in, learning a lot of good information.

Hi, this is my first post so I hope I don't get beat on too bad here. I have build 2 stove top stirling fans and neither one works very well. I am trying but am having issues. I would like to know if you all would be willing to answer a few questions so I can compare the dimension of what I have bui...