Search found 19 matches

by nickh
Tue Jun 17, 2014 3:00 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engine driven barbecue
Replies: 2
Views: 2884

Re: Stirling engine driven barbecue

See also the 'chicken flinger' in Brent Van Arsdell's book.

NHH
by nickh
Fri May 09, 2014 3:20 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: High powered Stirling going into production
Replies: 72
Views: 54788

Re: High powered Stirling going into production

Is a shaft output version to be available? Several people in the UK Stirling engine society have been looking at the SE as an alternative power unit for small river boats (E.g.http://www.youtube.com/watch?v=ZO1mcOu3zBQ). Electric launches are quite popular due to their practically silent operation, ...
by nickh
Thu May 08, 2014 4:44 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thermoacoustic engine restrictors
Replies: 3
Views: 3297

Re: Thermoacoustic engine restrictors

While there are thermoacoustic analogues of the Stirling engine http://en.wikipedia.org/wiki/Thermoacoustics I have yet to be convinced that there is any acoustic resonance basis to the operation of the single piston engines which often carry that title. I have no idea what 'lamina' is supposed to m...
by nickh
Mon Apr 14, 2014 2:06 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Rhombic drive vs. My "L" yoke drive
Replies: 8
Views: 5632

Re: Rhombic drive vs. My "L" yoke drive

Yes, not so good in some ways though unequal strokes is not necessarily a problem. I started with all the lengths equal for simplicity - more difficult to make changes when you are cutting metal rather than using a computer! Then, as is usual for me, once I had demonstrated it 'sort of' worked, I mo...
by nickh
Mon Apr 14, 2014 1:05 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Rhombic drive vs. My "L" yoke drive
Replies: 8
Views: 5632

Re: Rhombic drive vs. My "L" yoke drive

P1010557.JPG
P1010557.JPG (138.96 KiB) Viewed 5598 times
by nickh
Mon Apr 14, 2014 1:04 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Rhombic drive vs. My "L" yoke drive
Replies: 8
Views: 5632

Re: Rhombic drive vs. My "L" yoke drive

Not quite a CAD animation I'm afraid, but here is a variation that I mocked up a few years ago which gives straight line motion at one of the drive points in the manner of a half beam or 'grasshopper' steam engine.
P1010554.JPG
P1010554.JPG (140.2 KiB) Viewed 5598 times
P1010555.JPG
P1010555.JPG (135.75 KiB) Viewed 5598 times
P1010556.JPG
P1010556.JPG (135.46 KiB) Viewed 5598 times
by nickh
Mon Apr 14, 2014 12:32 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Acquired a Stirling Engine
Replies: 16
Views: 10067

Re: Acquired a Stirling Engine

This design originated in the 1950's with model company Davies Charlton based on the isle of Man.

NHH
by nickh
Mon Apr 14, 2014 12:21 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Rhombic drive vs. My "L" yoke drive
Replies: 8
Views: 5632

Re: Rhombic drive vs. My "L" yoke drive

Same mechanism as Allan Organ's hairdryer engine.

NHH
by nickh
Tue Mar 11, 2014 2:53 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: High powered Stirling going into production
Replies: 72
Views: 54788

Re: High powered Stirling going into production

This is exciting news indeed, been some time since a 'serious' Stirling engine project looked anywhere near market ready! Will there be an opportunity to buy just the bare engine for the tinkerers amongst us?

NHH
by nickh
Sun Mar 02, 2014 11:39 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Big Stirling Engine
Replies: 47
Views: 35418

Re: Big Stirling Engine

theropod2 wrote:(snip) Is an internet forum the place to have this drama unfold?
Unquestionably!

NHH
by nickh
Sun Mar 02, 2014 9:56 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Big Stirling Engine
Replies: 47
Views: 35418

Re: Big Stirling Engine

Well I can vouch for at least one of those feedback comments because it was mine!

As I said, overall I am vey pleased with the engine - but I did go in with open eyes, knowing what to expect in terms of power rather than accepting the sellers claims at face value.

NHH
by nickh
Sun Mar 02, 2014 5:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Hyporex engine
Replies: 11
Views: 6695

Re: Hyporex engine

And two more:-
attachment4.jpg
attachment4.jpg (142.5 KiB) Viewed 6647 times
attachment5.jpg
attachment5.jpg (137.28 KiB) Viewed 6647 times
NHH
by nickh
Sun Mar 02, 2014 5:15 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Hyporex engine
Replies: 11
Views: 6695

Re: Hyporex engine

Just for interest, here are a few pictures comparing the Hyporex 'Big Stirling Engine' with an original Ky-Ko motor.
attachment1.jpg
attachment1.jpg (136.45 KiB) Viewed 6647 times
attachment2.jpg
attachment2.jpg (134.82 KiB) Viewed 6647 times
attachment3.jpg
attachment3.jpg (100.94 KiB) Viewed 6647 times
NHH
by nickh
Sun Mar 02, 2014 4:20 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Hyporex engine
Replies: 11
Views: 6695

Re: Hyporex engine

I applaud anyone attempting to develop a commercially viable Stirling / hot air engine but unrealistic claims and worse, unrealistic expectations, will not help you to succeed where so many others have failed. Look at the benchmark Philips MP1002CA - it's not the engineering gem it is just because P...
by nickh
Sat Mar 01, 2014 5:32 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Hyporex engine
Replies: 11
Views: 6695

Hyporex engine

Looks like a representative of Hyporex has joined the forum so perhaps we will get some more information on these interesting engines. I just rcvd the following PM, presumably in response to my comment on power output in the 'big stirling engine' thread (which curiously seems to be unavailable for v...