Search found 308 matches

by Aviator168
Sun Jan 08, 2017 5:00 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Heater & Regenerator Design
Replies: 60
Views: 29404

Re: Heater & Regenerator Design

Whatever you do. Just don't let the working fluid get inside the displacer, not even through a very small hole.
by Aviator168
Sun Jan 08, 2017 8:00 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Heater & Regenerator Design
Replies: 60
Views: 29404

Re: Heater & Regenerator Design

As long as there is no passage way to the engine working fluid, it is fine.
by Aviator168
Sat Jan 07, 2017 11:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Heater & Regenerator Design
Replies: 60
Views: 29404

Re: Heater & Regenerator Design

this is open in the displacer can and in the crank case, so it always sees engine pressure
If the inside of the displacer sees engine pressure, it is dead space.
by Aviator168
Fri Jan 06, 2017 2:44 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Check out this guys stirling engine
Replies: 1
Views: 2398

Re: Check out this guys stirling engine

A lot of information for you guys. They seem to put in a lot of efforts

https://www.youtube.com/user/kyowa1193/videos

For your inspiration
by Aviator168
Fri Jan 06, 2017 12:25 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Check out this guys stirling engine
Replies: 1
Views: 2398

Check out this guys stirling engine

https://www.youtube.com/channel/UCwi5t4 ... SGGHyPOq2w

BTW. He is just pressurizing the cylinders, not the crank case. Defies all conventional stirling thinking.
by Aviator168
Thu Jan 05, 2017 9:01 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: gamma stirling engine scale
Replies: 5
Views: 3687

Re: gamma stirling engine scale

I get you Alfista. Makes sense.
by Aviator168
Thu Jan 05, 2017 7:58 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: varible phasing
Replies: 27
Views: 17538

Re: varible phasing

Yes. If you increase the temperature and change the phasing to close 0, it looks like an IC. Oh, you can get rid of the cold cylinder too. The point of a stirling engine is common material can be used and some how produce the comparable amount of power. In order to do that, the power from suction ne...
by Aviator168
Wed Jan 04, 2017 7:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: What are the challenges for making an engine that does real work?
Replies: 18
Views: 10384

Re: What are the challenges for making an engine that does real work?

Yes. He did with his 230w engine. Magnetic coupling can also transmit high power through a thick "semi" magnetic medium; but not the way he did it.
by Aviator168
Tue Jan 03, 2017 8:40 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: What are the challenges for making an engine that does real work?
Replies: 18
Views: 10384

Re: What are the challenges for making an engine that does real work?

Magnetic couplers are nice. But the designer has to make compromise between weight and torque.
by Aviator168
Tue Jan 03, 2017 6:53 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: gamma stirling engine scale
Replies: 5
Views: 3687

Re: gamma stirling engine scale

The problem is to get your 3.5 psi across the entire stroke is every difficult. One better show a detail analyse before claiming an effective pressure. On top of that, as the engine gets bigger, heating/cooling gets more difficult.
by Aviator168
Mon Jan 02, 2017 4:22 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Alpha type stirling engine Problem
Replies: 8
Views: 5379

Re: Alpha type stirling engine Problem

The bigger problem is. If your engine does not run because of seal ring friction, the engine is not produceing much power anyway.
by Aviator168
Sun Jan 01, 2017 4:23 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Snifting valve
Replies: 30
Views: 12916

Re: Snifting valve

Most stirling engines already get down to crank case pressure before maximum internal volume (because of small temperature difference). Without the snifter valve, the engine is just pulling negative pressure and losses power.
by Aviator168
Sun Jan 01, 2017 2:56 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: A Timing question
Replies: 8
Views: 5548

Re: A Timing question

the ALPHA motor is a Ross Yoke type, and the angle is somewhat different, 120*
Yeah. 90* offset is not optimum for alpha engines.
by Aviator168
Sun Jan 01, 2017 12:01 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Alpha type stirling engine Problem
Replies: 8
Views: 5379

Re: Alpha type stirling engine Problem

Please provide data for the following questions to start.
What is the total volume (including dead volume) of the engine?
What is the hot/cold gas temperature? I am not talking about heater and water temperature. I am talking about the temperature of the gas in hot and cold cylinder respectively.