Search found 156 matches

by cbstirling2
Mon Dec 19, 2016 12:33 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Heater & Regenerator Design
Replies: 60
Views: 29485

Re: Heater & Regenerator Design

Heat can be transferred from one place to another by three methods: conduction (metal), convection of fluids (gas), and radiation. I am theorizing that in the displacer cylinder sweep area (gamma or beta), one wants to keep the hot side hot, and the cold side cold. The only energy transfer you want ...
by cbstirling2
Sun Dec 18, 2016 8:59 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Curious about the Willstead model engine (vs Bohm vs others)
Replies: 6
Views: 4707

Re: Curious about the Willstead model engine (vs Bohm vs others)

I also wonder if I ran the engine upside down if that would help with shrouding protecting the cold side...
by cbstirling2
Sun Dec 18, 2016 8:56 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Curious about the Willstead model engine (vs Bohm vs others)
Replies: 6
Views: 4707

Re: Curious about the Willstead model engine (vs Bohm vs others)

I wonder if the Böhm engine can be improved by electrically insulating the stainless heat head from the brass cooling tower? A thin wafer washer? Only the bolts would conduct heat
by cbstirling2
Sun Dec 18, 2016 8:28 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Heater & Regenerator Design
Replies: 60
Views: 29485

Re: Heater & Regenerator Design

Shouldn't the hot and cold sides of the displacer cylinder be electrically insulated?? That would reduce conductance of heat...
by cbstirling2
Sat Dec 17, 2016 10:45 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Curious about the Willstead model engine (vs Bohm vs others)
Replies: 6
Views: 4707

Curious about the Willstead model engine (vs Bohm vs others)

A few years I got a Bohm Stirling model and was not happy with its performance. It ran but after a while it would heat up and quit running in short order. It seems like a bad design (an older version of http://www.en.boehm-stirling.com/hb26.html ). To my newbie eyes, it appears that the hot side con...
by cbstirling2
Sat Dec 17, 2016 10:14 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: "Hi...We are new here!" First posts here (or anywhere is OK)
Replies: 442
Views: 182308

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Hello,
My name is Chris and I am technically minded, but I am mainly here for curiosity.