Thanks again Peter, from the looks of it these were a very well designed
engine for the period. Like the idea of using the plates to alter the
compression. Are there many left in collections, or more to the point did
they make many?
I think Petter and Lister used compression plates of a kind, but these are quite
nicely defined and obviously they had a bit of experience in the use of the
variable compression ratio to suit different fuels.
I think they were out of business in 1924, probably depression-era failure,
there is not a lot of information on the net either.
There is the preserved engine at Portland which is owned by the Tri-State Gas
Engine And Tractor Association at Portland. They have accepted a copy of the
catalogue for their own information, and the other guy is Rick Strobel who is
chasing after a 50hp engine.
Other than that, I don't know of any, but I am sure there must be a few sleepers
The Portland engine is pictured in our show series of pictures, I think we took
pictures each of the three years we went over there.
Peter & Rita Forbes