Search found 150 matches

by cbstirling2
Sun Apr 21, 2019 5:35 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Square pistons/cylinders
Replies: 7
Views: 224

Re: Square pistons/cylinders

A strong second place design is a L shaped Alpha. You pay a price for more dead space due to distance between the hot and cold space but vastly simple linkage.

by cbstirling2
Sun Apr 21, 2019 5:29 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Square pistons/cylinders
Replies: 7
Views: 224

Re: Square pistons/cylinders

Which steak engines had square pistons? With Stirling engines being over 100 years old there is no reason to reinvent them. I recommend sticking to proven designs. I've have a handful of engines and I tend to sell off bad runners. I've noticed that alpha engines give the best power followed by beta ...
by cbstirling2
Fri Apr 19, 2019 7:36 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Melvin Engine
Replies: 11
Views: 203

Re: Melvin Engine

How many hours are on the Melvin?

I think it needs many hours of running to see what is wearing...
by cbstirling2
Thu Feb 21, 2019 8:58 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 22
Views: 3689

Re: Whispergen mk4

I would think cast iron would work. I suspect the thermal property is similar.
The benefits of stainless is corrosion resistance.
by cbstirling2
Sun Nov 04, 2018 6:05 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design and Manufacture of Beta Stirling
Replies: 8
Views: 2092

Re: Design and Manufacture of Beta Stirling

After receiving it in the mail, I was puzzled as well. Why on Earth, is there so few cooling fins and not all the way up? I wish I had a lathe! Installing aluminum fins could be done in a clamping fashion so they could be removed if need be. Maybe I could drill out finned computer heat sinks? Take 2...
by cbstirling2
Sat Nov 03, 2018 8:12 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design and Manufacture of Beta Stirling
Replies: 8
Views: 2092

Re: Design and Manufacture of Beta Stirling

Speaking of cooling area, this is a dual gamma engine that I recently purchased from Germany. It runs good but I think it could run even better. I think there should be fins or a water jacket on the upper part of the displacer. I see no reason for that area to be "bare". Do others agree? IMG_2018110...
by cbstirling2
Sat Nov 03, 2018 7:40 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Engine not running
Replies: 6
Views: 1350

Re: Sterling Engine not running

I have one of those engines, a good runner. That's an alpha engine, so no gland and no displacer. It should only be lubricated with extremely fine graphite powder. I recommend cleaning pistons and cylinders with cotton q-tips and rubbing alcohol. After you assemble it again, when you turn it over, y...
by cbstirling2
Sun Aug 19, 2018 7:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Small Stirling Engine
Replies: 10
Views: 2645

Re: Small Stirling Engine

I have the same Stirling engine and "generator" and I believe it easily lights the led. Perhaps the generator is faulty presuming your engine has good RPM.

Sent from my PH-1 using Tapatalk
by cbstirling2
Sun Jun 24, 2018 6:06 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 22
Views: 3689

Re: Whispergen mk4

Any luck getting the whisper gen running again?
by cbstirling2
Fri May 25, 2018 1:09 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 22
Views: 3689

Re: Whispergen mk4

Mk5 was quite popular in germany, you could get them on ebay.de for 150 ey for not working, 1000-1500 used, 3000++ for new. But they have cracking hot side heat exchangers. About mine - do not imagine too. On one motor lime scale popped up cold heat exchanger and water got inside. On other dont ima...
by cbstirling2
Fri May 25, 2018 1:08 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 22
Views: 3689

Re: Whispergen mk4

So cool!
by cbstirling2
Wed Apr 11, 2018 5:36 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Noob question - would these parts work?
Replies: 23
Views: 4523

Re: some alpha engines have displacers

Blaf, some alphas have displacers and since you have not started building yet, I would encourage you to consider the possibility in your design. Usually, this has the result of moving the rings of the the hot piston a good distance from the heat. Directly heating the cylinder and piston is rather p...
by cbstirling2
Mon Mar 05, 2018 1:51 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Converting Compressor to an Alpha Stirling Engine
Replies: 7
Views: 3084

Re: Converting Compressor to an Alpha Stirling Engine

I could only find one that was barely based off a Chrysler AC compressor. They had to rework so much, that they could have easily started from scratch.
by cbstirling2
Thu Mar 01, 2018 5:53 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Converting Compressor to an Alpha Stirling Engine
Replies: 7
Views: 3084

Re: Converting Compressor to an Alpha Stirling Engine

Has anyone any where actually been successful in converting an air compressor to a Stirling engine??
by cbstirling2
Mon Feb 19, 2018 8:27 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Blechspielzeug engines
Replies: 2
Views: 1571

Blechspielzeug engines

I noticed ministeam is selling this apparently larger model? Any thoughts about it?

https://www.ministeam.com/acatalog/Stir ... ml#SID=342


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