I've heard PLENTY of MD-80s taking off, and I don't think an aircraft with four of those Pratts under the wings would be considered Stage III compliant. Maybe cleaner in terms of exhaust... Anyway, does anyone know anything about this? How are these engines comparable to the original 707 JT3D/C turbofans?
GDB From United Kingdom, joined May 2001, 13387 posts, RR: 77
Reply 1, posted (13 years 7 months 1 day 3 hours ago) and read 884 times:
These engines will be a lot quieter, and have a lot less emissions than the old JT-3D's.
This conversion is aimed at 707 cargo operators, to help keep their aircraft viable for a few more years.
Also, it's being pitched at military operators as a much cheaper than fitting solution than CFM-56's, so they'll be aiming at USAF/NATO E-3 AWACS, USAF KC-135E's/RC-135's and 707 conversions operated by other airforces.
Ilyushin96M From United States of America, joined Sep 1999, 2609 posts, RR: 12
Reply 2, posted (13 years 7 months 7 hours ago) and read 868 times:
Well, I would think the CFM engines would provide greater thrust and thereby better performance than the smaller JT8D-219s. CFMs may be more expensive, but I think the efficiency and viability would outweigh the cost. But it's interesting to see that further re-engineing programmes are being developed for the 707.