Howell Stirling Engine Fan

[Bear]

  Great job.

[Admiral_dk]

Really great runner (now you leth the Elf out  ) 

It looks like it's running fast, so - is it moving a lot of air ?

Per

[RReid]

Thanks Bear!

It looks like it's running fast, so - is it moving a lot of air ?

Hi Per. Well, it's not going to knock the hat off your head, but it does make a nice little breeze.

[Dave Otto]

Congrats on a runner Ron!
It looks great!

Dave

[RReid]

Thank you, Dave!

[propforward]

That’s great! What a fun build.

[fumopuc]

Hi Ron, very nice and useful runner. Congratulations.

[RReid]

Hi Stuart. Hi Achim. Thank you both!

[Don1966]

Very nice job and a awesome runner…..



 
Don

[RReid]

Thank you, Don!

This is an image I meant to post earlier and never did. A view of the inner works "undressed", so to speak.

[bent]

Woo hoo!  Looks and runs great, nice job!

[RReid]

Thank you, Bent! 

[Craig DeShong]

Well done;

 I have visions of me trying to balance the fan blades by shaving a bit of the heavy blade, over and over, till only the axle would be left.     Obviously, you didn’t have that problem.

[RReid]

I have visions of me trying to balance the fan blades by shaving a bit of the heavy blade, over and over, till only the axle would be left.

Hi Craig. Yes, that would have been a small problem.
Actually, I weighed each blade before they were mounted and all were the same to the nearest gram, which is as good as my little scale can do. They all came from one sheet, which probably helps. I used to balance the props for my RC airplanes, but with that result I figured I'd see how things went first. As it turns out, at the speed the thing wants to run there is little to no vibration. I must be living right.

[Minh Thanh]

That’s great !! 
Thanks for sharing .