Search found 143 matches

by Wellington
Fri Sep 02, 2016 9:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engine project
Replies: 8
Views: 6898

Re: Stirling engine project

Aluminium is ok for the mechanical parts, but not ideal for the displacer for a number of reasons. First it conducts heat too fast from the hot end, to the cold end. Next if you are going to use anything hotter than a candle, or small meths burner, it won't stand the heat. Ian S C DSC01133 (800x600...
by Wellington
Fri Sep 02, 2016 9:13 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Durability of aluminium parts
Replies: 4
Views: 4980

Re: Durability of aluminium parts

Yes aluminium alloy is quite ok, but don't use it for bearing surfaces, aluminium against aluminium does not work. Use steel shafts, and either use ball races(best)bronze, or cast iron bushes, or a bearing grade plastic. To get a good seal on the displacer rod, a good fitting bush of at least 4 dia...
by Wellington
Thu Sep 01, 2016 10:09 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engine project
Replies: 8
Views: 6898

Re: Stirling engine project

HI Riccardo - Just joined myself a few minutes ago and noticed your forum request. I have made a few with all aluminium and they work extremely well. They are light in weight and can take a fair bit of heat and your wall clearance seems OK to me, though there may be a few qualified people out there...
by Wellington
Thu Sep 01, 2016 9:51 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Durability of aluminium parts
Replies: 4
Views: 4980

Durability of aluminium parts

Question: I'm concidering making all of the mechanical parts of a gamma stirling engine from aluminium (not including displacer, displacer housing or power piston). Would this be a mistake or is aluminium durable enough to last for years?
Wellington
by Wellington
Thu Sep 01, 2016 2:03 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thickness of hot end wall
Replies: 2
Views: 3669

Re: My suggestions for wall thickness

Alfista wrote:
My suggestions for wall thickness.....
Thanks Alfista. On a different note, do you know of any radial/rotary hot air engines that actually work and have a good rpm speed?
Regards Wellington
by Wellington
Wed Aug 31, 2016 7:27 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thickness of hot end wall
Replies: 2
Views: 3669

Thickness of hot end wall

Can anybody tell me how thick the hot end stainless steel tube is likely to be on this engine or what would be a recommended thickness for an engine this size?:

https://www.youtube.com/watch?v=4AsnE9kwyDw

thanks
Wellington
by Wellington
Wed Aug 31, 2016 6:07 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling Engine plans
Replies: 1
Views: 3818

Re: Stirling Engine plans

yes I second that request and would be interestd in plans for this engine or something similar.
Wellington
by Wellington
Sun Aug 28, 2016 9:55 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The fastest stirling engine in the world
Replies: 8
Views: 8866

Re: The fastest stirling engine in the world

Andy Ross's B-20, 35 cc Ross Yoke engine has a free speed of 4700rpm. 3250 rpm 40.8 W 2400 rpm 41.7 W 2600 rpm 41.7 W 2750 rpm 44.1 W 3000 rpm 40 W 3200 rpm 39.7 W Ian S C I bet mr ross will be disappointed to hear that my Mk1 combobulator achieved a free speed of 4701RPM. I just wish I had made a ...
by Wellington
Sat Aug 27, 2016 7:25 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The fastest stirling engine in the world
Replies: 8
Views: 8866

Re: The fastest stirling engine in the world

PS. PS Official recognition may be awarded for the best tallest story.
by Wellington
Fri Aug 26, 2016 11:13 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The fastest stirling engine in the world
Replies: 8
Views: 8866

The fastest stirling engine in the world

Would be interested to know if anyone knows of any possible contenders for the fastest rpm stirling/hot air engine in the world?. This is not an official recognition or prize winning ceremony so feel free to submit any legends you heard at the bar as well as some genuine examples of very fast engines.
by Wellington
Mon Aug 22, 2016 11:25 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Rider and Erricson Engine Plans
Replies: 2
Views: 4127

Re: Rider and Erricson Engine Plans

Thanks for the tip alfista and yes I nearly choked when I read the price on amazon.

regards
Wellington
by Wellington
Sun Aug 21, 2016 1:18 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Rider and Erricson Engine Plans
Replies: 2
Views: 4127

Rider and Erricson Engine Plans

Anyone have any links to a good guide to building a rider erricson hot air engine? Instructions on dimentions would e very usefull.

Thanks
by Wellington
Sat Aug 20, 2016 9:39 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurising Beta Stirling Engine
Replies: 6
Views: 4553

Re: Pressurising Beta Stirling Engine

To pressurise a motor both sides of the piston are effected, the crankcase is pressurised, so the bell crank and connecting rods would make this design impractical as a pressurised as a pressurised machine. The simplest layout is the one often seen with a two throw crankshaft, with the displacer cr...
by Wellington
Wed Aug 17, 2016 1:45 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Looking for a powerfull horizontal stirling engine model
Replies: 2
Views: 4588

Re: Looking for a powerfull horizontal stirling engine model

Alfista wrote:

Wellington,
I know that this is not what you are looking for but.......
Thanks for taking the time Alfista.
regards
Wellington.