Search found 143 matches

by Wellington
Thu Jan 04, 2018 9:53 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Duct tape as diafram
Replies: 0
Views: 25628

Duct tape as diafram

Just a quick question. Has anyone ever tried using strong duct tape as a diafram on a free piston engine instead of a balloon and if so did it work?
Thanks

Wellington
by Wellington
Thu Jan 04, 2018 9:31 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engines with an internal spring question
Replies: 16
Views: 9154

Re: Stirling engines with an internal spring question

Wellington, it seems that you are describing the Ringbom..... Im basically looking to build an engine that is as simple to build as possible yet be made of materials that are durabled and presentable enough for sale as a quality made product. I've been looking at linear free piston engines but have...
by Wellington
Thu Jan 04, 2018 7:44 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engines with an internal spring question
Replies: 16
Views: 9154

Stirling engines with an internal spring question

Hello again everyone. long time since my last post. Is it possible to build a hot air engine that pushes a displacer forward with hot air expansion and then the rebounding displacer is done using a spring as well as the natural suction of the cooling hot end? (Thereby eliminating the need for a powe...
by Wellington
Sat Sep 24, 2016 11:06 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: basic dimentions needed for gama design

Glass syringes should be ok for a power cylinder. When you mould the JB Weld piston, the inside of the tube that you mould it in is lightly smeared with grease, to stop it sticking, as an extra, sprinkle some graphite powder on the grease, so that the outside of the piston has some graphite for ext...
by Wellington
Thu Sep 22, 2016 7:29 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: basic dimentions needed for gama design

Thanks for taking the time to provide all this info guys. I'm sure it will prove useful. Q: How long can I expect glass to last inside a stainless steel piston cylinder? I have a small model stirling engine that uses a small AA size battery inserted into a brass tube and inside the brass tube forwar...
by Wellington
Tue Sep 20, 2016 11:28 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: basic dimentions needed for gama design

Thanks for the info Ian and Alfista. I'm looking to build an engine that does not require machining and a lot of maintainance. Do you think an epoxy piston in a steel cylinder would work without any glass?

Wellington
by Wellington
Wed Sep 14, 2016 1:02 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: basic dimentions needed for gama design

Ian S C wrote:The ALPHA motor is a totally different machine.....Ian S C
Thanks Ian. Can you recommend any good links to learn about the basics of the alpha design?
Wellington.
by Wellington
Tue Sep 13, 2016 5:09 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: basic dimentions needed for gama design

The gap at each end...... Thanks Ian. These two links should keep me busy a while. You once recommended putting the crank and alternator all in one housing for a pressure design. The v twin alpha design looks most suitable for making a pressurised engine. Do the following dimensions given on the Ro...
by Wellington
Tue Sep 13, 2016 3:52 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: basic dimentions needed for gama design

Ian S C wrote:The gap at each end......
Thanks Ian. These two links should keep me busy a while.
Wellington.
by Wellington
Tue Sep 13, 2016 3:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: dimensions of gamma engine

Alfista wrote:
I refer you to Robert Sier's Notes on Hot Air Engines...


Just what I wanted. Thank you Alfista. Have you tried the delft clay kit I recommended yet?
Wellington
by Wellington
Mon Sep 12, 2016 5:27 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

Re: basic dimentions needed for gama design

for a GAMMA motor, as with a BETA......Ian S C ok thanks Ian. any other dimensions that I need to know about? like how near the tip of the cold end should the displacer stop? Also how do you match up the crank turning circle diameter (say 4cm) with the total distance of displacer movement? Wellingt...
by Wellington
Sun Sep 11, 2016 11:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: basic dimentions needed for gama design
Replies: 20
Views: 12939

basic dimentions needed for gama design

Ok, got lots of tubing of various sizes and am ready to begin my first engine. Can anyone give a brief explanation or link to the basic dimensions and volumes of a gamma engine. my main concern is how do you calculate how much volume of air to pump into the cold side with the power piston?

Wellington
by Wellington
Fri Sep 09, 2016 5:27 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Duel Steam/Stirling Engine
Replies: 2
Views: 4664

Re: Duel Steam/Stirling Engine

tibsim wrote:URL removed because of it's "anti-Semitic" views. Do not re-post.
thankyou
by Wellington
Wed Sep 07, 2016 9:20 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Duel Steam/Stirling Engine
Replies: 2
Views: 4664

Duel Steam/Stirling Engine

Anyone know of any examples of an engine that is both a hot air engine and a steam engine?
Thanks
Wellington
by Wellington
Sat Sep 03, 2016 10:21 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engine project
Replies: 8
Views: 6914

Re: Stirling engine project

I prefer to use unobtainium for its lightweight and stronger than steel qualities for a displacer
Wellington.