Building another Stirling

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cidrontmg:
Some time ago I built a Stirling engine, shown here http://madmodder.net/index.php?topic=3761.msg40590#msg40590
Since then I´ve mounted it to a base board, and it has been running for many hours (1/4 l of ethanol).

It now runs so nice I thought I´d build another, a bit bigger (about 1.3 scale) this time. Most of the materials will be similar, but I´m out of 4 mm ali plate and 16x16 bar, so I will use brass for those parts. I´ve also bought the difficult items (test tube, graphite, bearings, fasteners, etc.), so let´s see how it goes. There´s no real plans for this, I´m just making parts to fit together...
There should be a Stirling inside these.

And these

The flywheel is just to keep the ali bars from rolling away, it won´t be part of the engine. You will notice that I bought two test tubes, just in case. I didn´t break the tube for my first engine when cutting it, but I might, this time around... The test tubes are 30 mm dia outside, in the above engine it´s 20 mm. That´s nowhere near 1.3 scale, I know... But as any politician will tell you, there´s never too much hot air... The cord in the picture is glass fibre, to be used as a wick for the spirit lamp. There´s 1 meter of it, enough for many, many lamps.
The graphite is a lump of 20 mm dia and 42 mm long, enough for 2 pistons at least. There are also 5 bearings (of 10x6x3 mm) in the bag, only 2 will be needed for this build.
I probably won´t be making this in a hurry, so be patient...
:wave:

Stilldrillin:
Good luck Olli...... :wave:

I'll be patient! :thumbup:

David D

cidrontmg:
Cutting the bars to size. I have a B&D band saw that I misuse for such things.

Cutting 4 mm brass is a piece of cake. About the same as cutting 6 mm plywood.

40 and 50 mm ali bars take some time, but far less than with a hacksaw. And way easier to my right shoulder.

I also cut the 16x16 mm brass, and some 70 mm ali, for the flywheel. That´s about the max. that the B&D will take.
There were 2 pieces of the 50x4 mm brass, 113 mm long, 2 pieces of 40 mm dia ali, 53 mm and 20 mm long, 2 pieces of 50 mm ali, 60 and 20 mm long, one 16x16 mm brass, 105 mm long, and one 70 mm dia ali, 18 mm long. That´s all the "big" pieces. There will be some smaller pieces also, but they will be salvaged from scrapped stuff. More later.

Rob.Wilson:
Looking forward to watching this build :thumbup:

Rob

johnbaz:

--- Quote from: Rob.Wilson on November 12, 2010, 06:40:29 PM ---Looking forward to watching this build :thumbup:

Rob

--- End quote ---

+1 :clap:

Cheers, John :thumbup:

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