Search found 3301 matches

by Tom Booth
Sun Oct 16, 2016 3:09 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

This pdf describes air-cycle refrigeration.

http://www.grimsby.ac.uk/documents/frpe ... search.pdf
by Tom Booth
Sun Oct 16, 2016 2:57 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

Sounds to me like you are talking about a variation on what is currently known as an "Air Source Heat Pump" I can't say I understand it well enough though, to do the maths to check whether it is theoretically possible or not. Well.. I think "air source" just refers to where the ...
by Tom Booth
Thu Oct 06, 2016 6:02 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Burnt pancake displacer (carbon foam)
Replies: 10
Views: 14309

Re: Burnt pancake displacer (carbon foam)

Some interesting info regarding the heat conductivity of various carbon materials. Very variable depending on how it is made. Interesting that pyrolytic carbon is or can be MORE heat conductive than copper by a factor of 5X. http://www.christinedemerchant.com/carbon_characteristics_heat_conductivity...
by Tom Booth
Thu Oct 06, 2016 1:58 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Burnt pancake displacer (carbon foam)
Replies: 10
Views: 14309

Re: Burnt pancake displacer (carbon foam)

One other thing. It's quite possible that starch is not the culprit as far as chalkiness goes. Possibly the opposite as some bread recipies call for added corn starch to make the dough more plastic and give the bread a better texture. The corn starch heated with some water seperately to make a goo w...
by Tom Booth
Thu Oct 06, 2016 10:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Burnt pancake displacer (carbon foam)
Replies: 10
Views: 14309

Re: Burnt pancake displacer (carbon foam)

The white bread hamberger bun was not very permeable. Not much air could get through. Some made out of a whole grain slice of bread ended up with very open pores that air could very easily flow through. It does also seem that various similar carbon fiber/mesh materials have been used as regenerators...
by Tom Booth
Tue Oct 04, 2016 2:38 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Burnt pancake displacer (carbon foam)
Replies: 10
Views: 14309

Burnt pancake displacer (carbon foam)

Recently I've been re-researching what sturdy lightweight materials might be used for an LTD displacer. The engine I got from amazon had some black foam rubber type displacer that shrunk and warped when I tried to run it on top of my wood stove for a few minutes just to see how fast it might go. The...
by Tom Booth
Sun Sep 18, 2016 6:19 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

Looks like a variation on the "Icy Ball" ammonia absorption refrigerator. https://youtu.be/jA6UBKi13BY As some here may be aware I've previously posted about the possibility of a heat engine running on ambient heat. Tesla worked on building such an engine........ . Take a look at Robert mu...
by Tom Booth
Wed Aug 17, 2016 11:34 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's "Ambient Heat Engine" Experiment
Replies: 175
Views: 182631

Re: Tesla's "Ambient Heat Engine" Experiment

I will be continuing research on Tesla's theory and I will be building a prototype. Hopefully a WORKING proof of concept model, but I can't give any guarantee of that at this point of course. I do think that there is a chance of it actually working or, naturally I wouldn't bother. If anyone would li...
by Tom Booth
Wed Aug 17, 2016 11:24 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

I'm going to be doing my best to put together a heat engine based on the principles Tesla described in his article, though probably not a replica since as far as I know, nobody knows what Tesla's engine might have looked like and it is debatable if any kind of prototype ever existed. Regardless I'm ...
by Tom Booth
Tue Jun 21, 2016 12:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

Ordinary glass I don't think will transmit infrared light. It is possible to get such glass. The articles about it say that it needs to have "direct exposure to the sky. Apparently it would not work inside a building but only on the roof. Putting it inside anything to thermally isolate it could...
by Tom Booth
Mon Jun 20, 2016 11:54 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: How do i make a linkage like this:
Replies: 6
Views: 6779

Re: How do i make a linkage like this:

It looks like it was made out of some parts from some old shock absorbers. Possibly off a motorcycle.
by Tom Booth
Mon Jun 20, 2016 7:17 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

Hmmm... I wouldn't believe anything I couldn't get my own hands on. That said, I've been following something called "photonic radiant cooling" which has applications in air conditioning. It is a method of making a surface 'see' space by matching the frequency of the atmosphere or some suc...
by Tom Booth
Mon Jun 20, 2016 3:11 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

The photonic radiant cooling is, to say the leas, interesting. If this material is 9 degrees cooler than ambient air by virtue of just sitting there radiating heat into space one would think it could be put on the top of one of those "ultra LTD" Stirling engines and have it running with no...
by Tom Booth
Mon Jun 20, 2016 8:41 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

Have you ever heard of Charles Tripler ? He had, back in 1890 come up with a way to make liquid air by the barrel full and found that he could use the liquid air to run a steam engine to drive an air compressor to make more liquid air. He was able to use 3 gallons of liquid air in his machine to mak...
by Tom Booth
Mon Jun 20, 2016 1:25 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Heat Engine
Replies: 19
Views: 18672

Re: Tesla's Heat Engine

After studying all the elements that went into cycling ambient air through this machine and putting it all together in a way that made sense to me, based on basic principles, I imagine the air being cycled this way: Ambient air is drawn in by means of some form of air pump/compressor. The air taken ...