Search found 10 matches
- Tue Mar 12, 2024 1:48 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Lamina Flow Stirling Engine wont run consistently
- Replies: 0
- Views: 7859
Lamina Flow Stirling Engine wont run consistently
Hey all, in the same topic of stirling engines not running, I was curious if anyone has any experience with getting a finnicky thermoacoustic engine to run. Basically, I can sometimes get it going for a minute or two, but it will die out. Then, if i let it cool down for 15-20 min and come back and l...
- Thu Feb 29, 2024 3:30 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Choosing bearings for Flywheel
- Replies: 7
- Views: 3706
Re: Choosing bearings for Flywheel
You turned out to be totally right, Mike. I built the engine and it doesnt run. I have several theories. First is the that the piston is way too heavy. I am using a brass piston connector on a graphite piston. Thing weighs a lot. Second, my brass cylinder is not perfectly round. I am going to pivot ...
- Thu Feb 22, 2024 3:37 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Piston-Crank Connection
- Replies: 8
- Views: 3442
Re: Piston-Crank Connection
Ah what would you recommend that might be better in this application?
- Thu Feb 22, 2024 3:04 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Piston-Crank Connection
- Replies: 8
- Views: 3442
Re: Piston-Crank Connection
I tapped the graphite and it works with 10-24 threads. I am now making the connector from the piston to the crank arm. I am making the connector out of brass. What hardware does the example you sent use to connect the metal to the crank arm?
- Thu Feb 22, 2024 2:50 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Choosing bearings for Flywheel
- Replies: 7
- Views: 3706
Re: Choosing bearings for Flywheel
Hmm interesting. Do you know anything about PTFE bushings? i was considering using a dshaft through 2 ultra low friction PTFE bushings. They are only rated for 8 lbs and 120 RPM though. I will look into the bearings you sent! Thanks!
- Thu Feb 22, 2024 10:01 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Choosing bearings for Flywheel
- Replies: 7
- Views: 3706
Re: Choosing bearings for Flywheel
Thanks Vincent! I was looking at some lamina flow stirling designs and many of those use very thin shafts. Is there a benefit to picking something smaller or thinner to reduce the friction area?
- Sun Feb 18, 2024 3:46 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Piston-Crank Connection
- Replies: 8
- Views: 3442
Re: Piston-Crank Connection
Thanks for the advice! I bought a 6" graphite rod so I think I'll use the first inch or two experimenting with tapping and see how it goes. The idea of using a joint connector is a great idea! If the tapping doesnt work i'll just use a through hole and use a joint connector.
- Sun Feb 18, 2024 3:36 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Choosing bearings for Flywheel
- Replies: 7
- Views: 3706
Choosing bearings for Flywheel
Hi All! Thank you for your advice from last post! I am now choosing bearings for my flywheel and was wondering if anyone had any advice. I am using a 2" diameter, 1" thick aluminum disk as my flywheel. I am trying to pick out bearings to put in the stand. I am going to use a dshaft which w...
- Fri Feb 16, 2024 8:39 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Piston-Crank Connection
- Replies: 8
- Views: 3442
Re: Piston-Crank Connection
Interesting! The threads in the graphite seem strong? I have never tapped graphite before and I'm worried how the threads will hold up if i tried.
- Fri Feb 16, 2024 12:26 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Piston-Crank Connection
- Replies: 8
- Views: 3442
Piston-Crank Connection
Hi! new member here! I'm making a lamina flow engine (also known as a thermoacoustic stirling engine) for a university class. I am making the cylinder out of 306 brass and the piston out of .0004 grain graphite. I was wondering what the best way to connect the crank arm to the piston in the cylinder...