Search found 3 matches

by shadowjack
Sat Jan 14, 2017 4:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Epoxy piston or not?
Replies: 9
Views: 4643

Re: Epoxy piston or not?

I suggested flour and starch not as working material, but for testing purposes - getting your ratios right, mixing technique, casting process etc. I did not try casting piston, but researched topic in context of making epoxy granite for frames of diy lathes and mills - but did not try this either. Y...
by shadowjack
Sat Jan 14, 2017 3:35 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Epoxy piston or not?
Replies: 9
Views: 4643

Re: Epoxy piston or not?

You will not be able to do 90/10 mix - it will not coat and will be like wet sand at best. 30/70 or 40/60 is more realistic. Try first with other powder - like flour or starch. Also outer layer will be probably 100% epoxy, so you will not get any self-librication if you do not machine piston to smal...
by shadowjack
Sat Jan 07, 2017 5:04 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: High powered Stirling going into production
Replies: 72
Views: 53761

Re: High powered Stirling going into production

So far:
pellet burner in operation - not shown
5kw electrical output - not shown
10kw invertor - not shown
10 atm self-pressurisation with dry Nitrogen - not shown
Self-start - not shown
What is shown: some renderings, prototypes running, a lot of sales pitch. I call vaporware.