I am enthusistic about "unconventional" engines. As I was revisiting
the Stirling, I recall a particularly fascinating professor I once
knew who had evidently had a hand in making the small models of the
Stirling popular. I had seen one he used in a physics demonstration.
Then I happened upon a most interesting report in our college library-
it was a doctoral thesis on the Stirling, authored by none other than
Dr. (Robert?)Lovell, the same prof demonstrating the solar powered
stirling! This was in the early 80's. A series of brief but
fascinating conversations ensued with this brilliant but very humble
man. I am having difficulty finding anything more on his involvement.
Anyone aware of Dr. Lovell? I faintly recall that he commissioned a
machinist (in Arizona?) to make a model for him, and somehow out of
all this the models started becoming available to the public. Too bad
his thesis is not listed among the literature available. I do not know
whether his is still alive or not, he would be in his eighties now. He
retired into that position of professor; he had been an aerospace
engineer with many accomplishments before that.