In 1947, 44-85734 was transformed by Boeing into N5111N; a flying test bed for the Pratt & Whitney turbo prop research and development program. From 1949 until 1965 N5111N flew a 1000 hours as a 5 engine 299Z model with a XT34-P turboprop mounted on her nose where the bubble nose use to be. http://www.aflyer.com/atlantic_flyer.year/atlantic_flyer.march/b17.html
But where are the other 4 engines? Photoshopped out?
Thanks for the birthday picture, anyway, I am 62 today!
Papa Lima