While we're rambling...

Around Caterpillar (and I understand, some SeaBees reunions) there are stories about South Pacific island hopping US personnel finding Cat D-3 copies (if I remember the model number correctly.) The stories I heard (admittedly, secondhand) tell of copies complete with the logo on the emblems.

Personally, I was on a team that worked with some Swedish engineers who told this tale. Sweden was neutral, and had their own air force during WWII. They tried to buy P&W radials, but the US couldn't spare any for them. They asked to license-build them, but were not allowed to do that either. So, they simply reverse-engineered an engine, and produced them as needed.

The story continues that after the war they packed up one of their copies and brought it to P&W, explaining that they had made these copies during the war, and now wanted to pay licensing fees on them. The copy was mounted in a dyno and found to produce the same power as the P&W. (The old guy telling the story actually said "One horsepower more!" )

According to this guy, the P&W folks came out of committee and signed off on the built engines for a total fee of $1.00 US. I didn't ask what nameplate they put on the engines.

Cheers,
Dave Olson
(edited for some of the typos)