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Unique 3D printed engine

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gbritnell:
A good friend who's into rare and unusual engines came up with this. It known as a toroidal swinging piston engine. He asked me if I could make a printed model of it for him. I made all the CAD models and printed them on my printer. The engineering behind it is it has a disc connected to the main shaft. Attached to this disc are 4 pistons. The main shaft drives a second disc with 4 pistons though an internal ring gear and scotch yoke setup. As the first ring and piston move the second ring and pistons oscillates to close the gap between pistons thereby creating combustion chambers and pushing out exhaust gasses and taking in a fresh air/fuel charge. It's like a 4 stroke operating principal but without valves. It fires 2 combustion chambers simultaneously and does this 4 times per revolution.
The engine was made around the early 1900's and is quite a mechanical and machining achievement for the time. Little is known of the manufacturer but has a carburetor from an early Indian motorcycle.

gbritnell:
A few more pictures

BillTodd:
Beck by any chance?

http://www.douglas-self.com/MUSEUM/POWER/unusualICeng/toroidalIC/toroidalIC.htm

I don't think I animated that one.

Admiral_dk:
Intriguing Engine George  :praise2:

I think that I got some of the details sorted in my head - but also some I don't get ...!

The last picture - is that the Ignition + manual Advance ?

Shouldn't there be two Exhaust Ports (one might just be hidden by the angles of the photos) ...?

Don't really see the Scotch-Yoke in the pictures or how it is connected  :headscratch:

What is (missing) connected to the internal Gear next to the Power Output Axle ?

Per      :cheers:

gbritnell:
Hi Bill,
In my searching I had come across thar page but none of the engines pictured or described quite match this one.
Thanks for the link.
Gbritnell

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