RE: Pfalz DIII resources -- Photos, Drawings, Plans, etc.
I think the Blue Max planes had Ranger 6 cyl aircooled engines. I also understand that they did not fly well with the modern small prop and high rpm engine. They needed the big prop and lots of torque. What is interesting is there was a US licened version of the Mercedes engine in the 20's but I think it had a diffrent apllication than aircraft, but someone built a Folker DVII replica with one.
tom