Paul wrote:

Vance told me he inadvertently erased this picture and he would
like another shot at it. Virg is the only one that took a guess
as an OX5 and that was incorrect. I think we need a prize for this
to give people a little incentive.

Paul Lamar

vance wrote:

OK! - So I cheated - I went to my library - the engine in question is
the Pratt and Whitney R-2060, 20 cylinders in 5 banks which began
testing in 1931 (Gunston's "The Development of Piston Aero Engines"
photo on page 135). The single overhead cam layout was indeed inspired
by the Hisso. I thought at the time it was a strange arrangement for a
V-8 in that the two banks were not mirrored as is usual in a Vee layout.
The oversized case with the wide spacing was probably prompted by the
rather complex crank system which probably employed master rod
configurations like radials.
Interesting side note - the free piston engine was indeed intended for
an aircraft (the airplane that became the B-36) it was the gas generator
for the PT-1 the turbine worked OK but the gas generator not so good'
Vance

You were narrowly aced out by Bill Freeman Vance :-)

Paul Lamar
 
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