Steve Pace
Aviation History Writer
- Joined
- 6 January 2013
- Messages
- 2,266
- Reaction score
- 222
From http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2455The most unusual conversions were three B-17Gs converted to engine test beds. The nose section was removed and replaced with a strengthened mount for a fifth engine. The Pratt & Whitney XT-34, Wright XT-35, Wright R-3350 and Allison T-56 engines were all flight tested on JB-17Gs.
Matej said:At least I will try: is there any picture of the Tu-16LL with the AL-41F engine? I saw some photos of the Tu-16LL itself, but not any with that particular engine.
sferrin said:B-52 with TF-39 (C-5's engine).
Steve Pace said:Are there any high res images within the hands of members of this venue that relate to engine test bed aircraft? Here's two examples. -SP
Before that Boeing 707, Pratt & Whitney of Canada used a tri-motor Beechcraft 18 Expeditor to test fly prototypes of their PT6A small turboprop engine (1960s). The nose-mounted PT6A-20 only made about 550 horsepower, so the Beech 18 retained both of its wing-mounted P&W R-985 radial engines.Two more pics of the same aircraft from my hard disk: