Very clever Siemens style 8 cylinder engine

Discussion on Stirling or "hot air" engines (all types)
cbstirling2
Posts: 120
Joined: Sat Dec 17, 2016 9:35 pm

Very clever Siemens style 8 cylinder engine

Postby cbstirling2 » Mon Nov 13, 2017 8:01 pm

The cleverness of a Siemens engine is that uses the same bore twice which is more efficient.

In https://www.youtube.com/watch?v=XsD8aI6nPV0 instead of a wobble plate, he uses 8 gears arranged in an octagon.
Jump to 4:48 to see gears.
How does this compare to a wobble plate design?
A four cylinder could be made with just 4 gears.

I think this might be a wobble plate design(?):
https://www.ebay.com/itm/16-Cylinder-Ho ... 2108777861
Image

I've seen some engine designs use a roller cam plate. Image I cannot believe that this is without prior art: http://www.google.com.pg/patents/US20030046932

Another question, how would this compare to a Ross linkage style but made with 4 cylinders? (Is such a design possible?)

What is the most efficient linkage for a Siemens engine?

I really think the Siemens is the most efficient design.

Power wise: Gamma < beta < alpha < Siemens

Thoughts?
CBStirling2

Ian S C
Posts: 1983
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Very clever Siemens style 8 cylinder engine

Postby Ian S C » Tue Nov 14, 2017 1:57 am

The Whispergen has a 4 cylinder engine of this type with their own patented Z drive to the alternator, On talking to Dr Don Clucus(the designer/builder), he reckoned it was the most efficient, and compact design he could come up with.
Ian S C

Mcelravy
Posts: 1
Joined: Mon Nov 20, 2017 4:14 am

Re: Very clever Siemens style 8 cylinder engine

Postby Mcelravy » Thu Nov 30, 2017 9:31 am

That's pretty interesting design cb. Did you end up getting that from ebay? Any good?

Ian S C
Posts: 1983
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Very clever Siemens style 8 cylinder engine

Postby Ian S C » Fri Dec 01, 2017 1:28 am

Not sure, but I think that the wobble plate is more efficient than the swash plate in these engines.
Ian S C


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