At the same time, I mean-- an aircraft that has piston engines and one or more jets or turboprops. There have been lots of them: Lancaster/Lancastrians with Nenes and everything else, B-36s, B-50s, KC-97s, P4Ms, P2Vs, and then C-119s and the like with small jets for use on takeoff. The XA-26F set a 1000-km-with-1000-kg-payload record: 410 mph (did they take the record away from the Ju88?).
Question is, did any of the jet engines burn jet fuel? Or did they always use the same avgas that the pistons did?
I didn't find the right solution from the internet.
References:http://www.airliners.net/forum/viewtopic.php?t=736179B2b Digital Marketing Campaign