AA777223 From United States of America, joined Feb 2006, 1419 posts, RR: 5
Reply 6, posted (9 years 4 months 2 weeks 1 day 3 hours ago) and read 8940 times:
Quoting A340Spotter (Reply 5): TSTC, or CNW if you prefer...if you go there, you'll possibly see the new PrivatAir B763 that just went there last week.
Does this mean that the RR 747 is no longer there? I noticed the article was dated 2005. I am assuming L3 and TSTC share CNW share facilities. In fact, all of the Baylor aviation courses are done in conjunction with TSTC, at CNW. The university has many connections with L3; maybe I can finagle a tour!
Cf6ppe From United States of America, joined Mar 2006, 383 posts, RR: 0
Reply 8, posted (9 years 4 months 2 weeks 15 hours ago) and read 8770 times:
Engine Testbed Aircraft is an interesting subject.... I would like to add the following:
A highly modified B-17 aircraft was used as the testbed for the PW T-34 turboprop engine. The cockpit area was moved rearward and the test engine was fitted on the front of the fuselage. The T-34 engine @ 5-6000 hp could easily haul the B-17 with the regular four Curtiss Wright R-1820 engines feathered.
A B-50 aircraft was used for the testbed for the PW J-57 engine prior to the B-52 eight engine testbed. I was told by long gone Boeing mechanics that the B-50 testbed aircraft swooped down over BFI with the five engines running and then make a second pass and climb out with just the J-57 powering the B-50. First test flight of the J-57 was in 1951.
PW had two B-45 engine testbed aircraft. I am aware of J-75, JT3D, J-60, and TF-30 afterburner engines being tested on the B-45's. On the B-45 aircraft, the test engines were lowered from the bomb bay and air started. The B-45's had 4 each ~6000 lb thrust engines so the addition of a J-75, JT3D, or TF-30 afterburner powerplant substantially improved the (B-45's) climb performance. The little J-60 (@ 3000 lbs thrust) didn't help much....!
PW tested the T-57 - a turbo prop version of the J-57 - on a C-124. The inability to build a large enough propeller killed the T-57 project.
PW also installed two JT3D powerplants on a loaned B-66 aircraft in order to build up time on the JT3D's. But just as soon as the airlines started flying JT3D's in commercial service, the time painfully accumulated on the B-66 was quickly surpassed.
The B-17 and B-45's were operated from the PW airport in East Hartford.
Perhaps, some of the A-netters have photos of the above described unusual aircraft....
SEPilot From United States of America, joined Dec 2006, 7548 posts, RR: 51
Reply 13, posted (9 years 4 months 2 weeks 2 hours ago) and read 8571 times:
Bradley Air Museum (BDL) has a B-17 that was once used as an engine test bed; I saw it years ago, do not remember who used it or what engine it was used to test (may in fact have been this one.)
Quoting Cf6ppe (Reply 8): A highly modified B-17 aircraft was used as the testbed for the PW T-34 turboprop engine. The cockpit area was moved rearward and the test engine was fitted on the front of the fuselage. The T-34 engine @ 5-6000 hp could easily haul the B-17 with the regular four Curtiss Wright R-1820 engines feathered.
When I saw it it was in bad shape-had been heavily damaged by a tornado that went right through the museum-don't know if it's been restored or not.
The problem with making things foolproof is that fools are so doggone ingenious...Dan Keebler
Aeroweanie From United States of America, joined Dec 2004, 1612 posts, RR: 51
Reply 14, posted (9 years 4 months 1 week 6 days 23 hours ago) and read 8503 times:
There were actually two B-17 testbeds built as Model 299Zs. Besides the nose mods, they also had the cockpit moved aft. One went to Curtiss Wright (N6694C) and one went to Pratt & Whitney (N5111N). They were used to test the R-3350 and R-4360 initially. Later, they tested turboprops and I have seen a photo of the CW 299Z with a turbojet below the nose. The P&W 299Z ended up in the Bradley (now New England) Air Museum, where it was mangled by a tornado in 1979. It has since been restored and flew in 2004. The CW 299Z became a borate bomber and crashed in 1980. It too is being restored.