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by Ian S C
Sat Aug 19, 2017 3:32 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's "Ambient Heat Engine" Experiment
Replies: 14
Views: 3196

Re: Tesla's "Ambient Heat Engine" Experiment

Tom I have run my LTD motor on ice, the ambient temperature was 20*C, so there was a 20* (a little less) temperature differential. The but is the amount of energy required to make the ice.
Ian S C[img]
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by Ian S C
Sun Aug 06, 2017 8:14 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Flame eater V2
Replies: 4
Views: 190

Re: Flame eater V2

That's a very good looking little motor, it runs very well, thanks for showing it to us.
Is the glass tube across the cylinder heads the fuel tank incorperating the burners, a neat idea.
Ian S C
by Ian S C
Fri Jul 21, 2017 2:33 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The fastest stirling engine in the world
Replies: 8
Views: 1207

Re: The fastest stirling engine in the world

Wellington, with a bit of work you could get nearer to 4000 rpm, first change the aluminium displacer for a stainless steel one, make a burner that gets the hotcap evenly red, fit free running bearings on main and con rod big ends. Improve the cooling, either a fan, or change to water cooling. Nice ...
by Ian S C
Tue Jul 18, 2017 4:08 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: My flame eater engine !
Replies: 4
Views: 217

Re: My flame eater engine !

thanh-cuibap, that's a fine looking motor, it runs well. It will be interesting to see how well the aluminium piston lasts in the steel cylinder, it's not the best match of materials from an engineering point of view(don't let that worry you), the best metal for a piston is cast iron, but not always...
by Ian S C
Mon Jun 26, 2017 8:32 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: New to Stirling Engines...where to start?!
Replies: 5
Views: 380

Re: New to Stirling Engines...where to start?!

Hi brooksbee, what you build depends on what gear you have, if virtually none, you build a tin can motor, if you have a lathe, you can build nearly anything.. Once you deside what you want to build, then we'll help with some of your questions.
Ian S C
by Ian S C
Thu Jun 15, 2017 7:40 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: "Hi...We are new here!" First posts here (or anywhere is OK)
Replies: 406
Views: 43136

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

Eric, that should be OK. Welcome to the forum.
Ian S C
by Ian S C
Thu Jun 08, 2017 2:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: This is my first beta stirling engine !!
Replies: 16
Views: 1020

Re: This is my first beta stirling engine !!

There is a Teflon coating that can be put o the likes of aluminium pistons, it's called Xylan, this is baked on, and you would have to find a commecial firm to do it for you. With a steel cylinder, cast iron is the best metal to use. With the polished cylinder that the above motor uses graphite woul...
by Ian S C
Wed Jun 07, 2017 2:38 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: This is my first beta stirling engine !!
Replies: 16
Views: 1020

Re: This is my first beta stirling engine !!

It's good to use a ready made cylinder as this is probably the most difficult part to get perfect.
Ian S C
by Ian S C
Tue Jun 06, 2017 5:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: This is my first beta stirling engine !!
Replies: 16
Views: 1020

Re: This is my first beta stirling engine !!

Looks very good. I see you have fitted an oiler, don't get too carried away with oiling the piston, the motor will get gummed up, and you will need to strip it down to clean it inside.
Ian S C
by Ian S C
Fri May 26, 2017 3:51 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling Generators
Replies: 8
Views: 930

Re: Stirling Generators

Yep your welcome harry56.Ian S C
by Ian S C
Fri May 26, 2017 3:46 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Engine vacuum
Replies: 22
Views: 1883

Re: Engine vacuum

One inch bore. I took all measurements from the scale on the drawing.
Ian S C
by Ian S C
Sun May 21, 2017 11:40 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Engine Troubleshooting
Replies: 5
Views: 462

Re: Engine Troubleshooting

The first thing is that the power cylinder with a graphite piston has to be better than excellent, that is why they are used in glass cylinders. A good steel cylinder with a polished bore is essential. Got to go out to night so I'll look in again.
Ian S C
by Ian S C
Thu May 18, 2017 5:40 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurizing a free piston stirling with a spring or rubber bands?
Replies: 8
Views: 695

Re: Pressurizing a free piston stirling with a spring or rubber bands?

The main problem I have with the alternator is the low frequency, 10Hz to 15Hz, I think a larger bore power piston, working on a shorter stroke would increase the frequency, I would like 50Hz +/3000strokes per min. The two "transformers", are a pair of chokes out of a power supply with the...
by Ian S C
Wed May 17, 2017 2:02 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurizing a free piston stirling with a spring or rubber bands?
Replies: 8
Views: 695

Re: Pressurizing a free piston stirling with a spring or rubber bands?

Another method of springing, use in some commercial free piston engines is a gas spring, a small piston in a sealed cylinder. At long last I'm able to post a photo of my machine, it's a high temperature motor using LPG as fuel. The linear alternator produces about 6volts at .5Watt. Ian S C [img] DSC...
by Ian S C
Mon May 15, 2017 4:29 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurizing a free piston stirling with a spring or rubber bands?
Replies: 8
Views: 695

Re: Pressurizing a free piston stirling with a spring or rubber bands?

I have an atmospheric free piston Stirling Engine, it is built as a parallel cylinder Gamma motor. The displacer is the same as in a Ringbom motor so is self acting. The power piston is magnetically sprung, ie., one magnet is attached to the bottom of the piston, and another magnet is attached to th...

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