Heinrici type stirling

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Dean W:
Time for making the cooling fan.

For the hub that will hold the blades I used a piece of 3/8" brass. A groove was turned on one end for an o-ring belt,
and five slots cut around the circumference using a jewelers saw.

A piece of .010" brass sheet is cut into pieces for the fan blades.

A small bend is put in one end of each blade so it will hold fast to the slots in the hub.

When the blades are pushed into the slots, the bend keeps them in position for soldering.

Then, a little soft solder, and they're stuck for good.

I made a rim to go around the blades using the same .010" sheet. Once I got it to the correct
length and rolled up so it fit the blades well, it was soldered up same as the blades.

So, there's the fan. Onto the bracket that will hold it.

Using 1/16" brass sheet I laid out a pattern that looked about right and sawed it out with the
jewelers saw.

After some file work, the piece was put in the vise and the long tang bent square to the base piece.

Then a small bushing is soldered on that will hold the shaft that the fan will run on.

Cut the excess off that thing and rounded over with the file and this piece is done.

Last piece for this engine is the drive pulley that will run the fan. The pulley will be mounted
to the crankshaft on the engine and an o-ring will be used to power the fan off the pulley.

The bracket for the fan got a few coats of black paint. The fan got a few of the same red on
the flywheels of the engine.

Time for a few finish shots:

Close up shots, warts 'n all:

Can't do a video until Monday. I bought the wrong sized o-ring, and it's so tight the engine
won't turn freely. It's about 1½" too short and is stretched to it's limit. I have it put on
for pictures, but will have to get a new one Monday, and I'll have a new video sometime Monday evening.

Thanks to all of you who stuck with me to see this out! I sure do appreciate the many remarks, suggestions,
and tips, and time you all took in making your comments!

Dean

Rob.Wilson:
Can you put arrows to show were the warts are :lol: :lol: :lol: cracking build Dean :bow: :bow: :bow: :bow:

Looking forward to the Video

Regards Rob

Stilldrillin:
I don`t see no warts! :scratch:

Blummin well done Dean. I`ve really enjoyed following your build! :thumbup: :clap: :clap:

Looking forward to the video.......

David D

madjackghengis:
Hi Dean, you know there are laws about offering videos and then not showing them. I use odd sized o-rings all the time, working on sealing various engine parts, and I usually keep the "extra" o-rings that come with some gasket kits just to cut and glue back together, with super glue, for a size I don't have. It works well with o-rings for light belts as well. In any case, the fan looks like it should work, and now you have a machine and not a model, because it has a defined purpose and isn't just to look at any more. It looked so good in the video you did originally, I ordered the plans, and the parts kit, and they have arrived, so it will be built in and around the radial engine I'm working on, just to have something that is a bit less challenging when I'm not feeling like making ten of a part. Really looking forward to the video with the fan going. It's a beautiful piece of work, now about those warts.... :jaw: mad jack

Mike K:
Wow, great thread. Excellent work, Dean.

Mike

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