Gallery, Projects and General > The Design Shop

LTD Stirling Hard to Find Materials

(1/4) > >>

NickG:
Hi all

got  :proj: I'm afraid!

Jan Ridders has just made a Tiny LTD Stirling on his website but it calls for some materials that aren't easy for me to find.

It uses a 19mm OD glass tube for the displacer cylinder and a 6.5mm OD for the power cylinder. Then graphite for the piston. He uses brass for the displacer rod guide but I was thinking of using ptfe for that?

I suppose I could make them from other materials but then the power cylinder would be more difficult to make to achieve the fit required.

Anyone have any ideas?

Nick

Bluechip:
Not sure what you want Nick, but ..

Graphite stuff.

http://www.nogginend.com/index_files/GraphiteRound.htm

Never used them, no idea whether it's cheap, reasonable, outrageous ...

Found it some weeks ago, looking for some cheap PEEK. NAHIH  :bugeye:

Dave BC

raynerd:
I was talking to (mithering to death) the chap with the LTDs at the Stiriling stand at the Midlands Show. He explained that all his clear plastic displacer cylinder materials for his stirlings are from supermarket packaging. If you have a look around you`ll easily find something glass or plastic 19mm for the displacer cylinder. How about the neck section off a glass bottle of ketchup? Walk around tesco/asda with a ruler- you`ll look like an idot but I`m sure you`ll find something!

The power cylinder is where I messed up with my LTD. I cut a section out of a test tube but it wasn`t true enough. You really need precision glass tubing...which is £££

 

raynerd:
Just another thing... the chap showed me a few of his running really really nicely on graphite and glass. But as he pointed out, he had a few running very nicely on brass power cylinder with polished and anodised aluminium piston!  I`ll be going with that when I try and fix mine. I can`t afford the price of precision glass tubing with delivery.

Chris

BillTodd:
Test tubes - unfortunately only available in packs of 50 for £24

http://www.rapidonline.com/Educational-Products/Science/Laboratory-Equipment/Test-tube-with-rim/123522#

Lab equipment in general from Rapid:
http://www.rapidonline.com/Educational-Products/Science/Laboratory-Equipment

Middlesex university supplies:

http://www.mutr.co.uk/ - loads of interesting stuff (not cheap)

http://www.mutr.co.uk/product_info.php?products_id=8484


Bill

Navigation

[0] Message Index

[#] Next page