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Joined: Sat Sep 04, 1999 3:15 am

PWJT8D-219-powered 707 Variant?

Sat Nov 03, 2001 2:17 pm

Anyone know anything about this aircraft? Is this a one-off, or will we see more 707s with these engines flying?

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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?
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RE: PWJT8D-219-powered 707 Variant?

Sat Nov 03, 2001 6:17 pm

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.

Topic Author
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Joined: Sat Sep 04, 1999 3:15 am

CFM Vs. PWJT8D-219

Sun Nov 04, 2001 2:37 pm

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.

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