Use pneumatic actuator cylinders for a Stirling model?

[davesisk]

Hey folks, I'm new here...greetings!

I'm curious if it would work well to use small pneumatic actuator cylinders for a small Stirling engine model. Has anyone done this? Pneumatic actuator cylinders can be had quite cheap, and it would avoid quite a bit of tedious construction. Here's a link (for example):

https://www.surpluscenter.com/sort.asp? ... yword=ACDA

Any thoughts or has anyone built a small Stirling using these?

Cheers,
Dave

[davesisk]

Cool...I took a look at airpot.com, but I don't see pricing listed...how expensive are the glass cylinder/graphite composite pistons just out of curiosity?

So, I suppose I could disassemble and simply take the O-rings out. In your experience, would that remove enough friction but still leave the right amount of seal?

Cheers,
Dave

[speedless]

Hi
Dont use pencil lead,I tryed.Its sticky.
Pencil lead is containing clay,not good for friction.
Use graphite powder or an lubricant containing graphite.
Use the same amount graphite as the epoxy-hardner.Very little!
Heres some of my specs.
http://stirlingengineforum.com/viewtopic.php?f=1&t=267
Jan

[PKM]

If you can get a 7H (or other high number- more than a 2H at any rate) pencil, that will contain much more graphite and less clay then an ordinary HB pencil. I don't think even 7H is pure graphite but it's probably much better than a regular pencil.