Stirlingengineforum.com

Many thanks.

Hi
What material is preferred for a displacer body for a Stirling engine ?
Can this be aluminium?
I need to machine this on my hobby lathe.
The tube is about 16mm dial by about 40mm long with a minimal wall thickness.
Thanks

Hi
What material is preferred for a displacer body for a Stirling engine ?
Can this be aluminium?
I need to machine this on my hobby lathe.
The tube is about 16mm dial by about 40mm long with a minimal wall thickness.
Thanks

Hi all I want to make a sterling engine in my shed. I have a small lathe, mini milling machine and lots of metal offcuts etc. Having recently restored a SE I have a basic understanding of how it works and that friction and gas leaks are troublesome. With that in mind does anyone have any drawings of...

Thank you for your reply. I will Make a shroud and a copper sleeve. Plus I can try paraffin instead of the lamp oil. Thanks again for the advice.

My Stirling run's a treat when I heat the end with a mini cooking blow torch but if I use a candle wick with lamp oil it won't get hot enough and run.
Any ideas?

Thanks to everyone on here for the tips and advice.
I now have a fully working Sterlin Engine that was made by my late father. I ended up with a delrin piston and during the heat up I spay some fine oil onto the piston and the cranks. It runs so fast I thought it was going to take off. Thanks again

I think I'm nearly there now.
I made a piston out of some PTFE and to my delight it started running. However the piston is still dragging and producing friction. What is the ideal material for the block with the bore a d the piston?

Brass was better and it almost got running but the friction of the piston is still too much.
Now going to try a delrin piston.

The piston housing is aluminium and the piston is also aluminium and a bit loose. So I've made a new one out of brass and a slightly better fit. I will finish it off in the week but is ally and brass a good combo?

Nope... The clean up didn't work. However when it all gets hot I get smoke coming out from the sides of the piston. Is this telling me the piston is too loose. It's made from aluminium and does pop a very small amount when you pull it out. Thanks

On further strip down I found some swarf in the air exchange hole and grease. I will carefully clean and reassemble with fingers crossed.

Hi
I've used both brass and aluminium for the displacer but will give wood a go.
I apply heat towards the end of the tube.

Is there sine guides on setting the timing of the piston and displacer?

Hi all Thanks for the advice. I've adjusted the displacer as recommended and used some sealer. I've eliminated as much friction and any snags and I can spin the flywheel and get a few revolutions freely. Still can not get it started. Is it possible the cranking is wrong? I've tried many possibilitie...

I've also tried different lengths of displacers. No difference at all,