AirRyan From United States of America, joined Mar 2005, 2532 posts, RR: 5 Posted (9 years 10 months 1 day 3 hours ago) and read 3693 times:
It seems sort of odd to me that having two customers already selecting GE CF6's for their KC-767's in Japan and Italy that the USAF would opt for P&W on the KC-767 when in fact they have a number of new and updated aircraft going with GE and the CF6 based engines.
Even now all Boeing has on their website about the 767 is with P&W:
Shouldn't the decision of the engines be left up to the customer and be decided upon say around the awarding of the contract? For that matter, did the USAF even want the P&W over the GE or is this just some sort of Boeing reciprocal concession to P&W?
SATL382G From , joined Dec 1969, posts, RR:
Reply 1, posted (9 years 10 months 1 day 3 hours ago) and read 3686 times:
Ya gotta remember that this program was well along when Congress shut it down. In fact the first frame is structurally complete, pickled, and stored at Everett. Boeing had to make a decision on the engines and picked P&W -- remember Boeing was going to own the airframes. I have hard time believing Boeing didn't get a thumbs up from USAF on the engines though....
It does seem odd, especially considering USAF reengined it's E-4s from P&W to GE.
Either I didn't read this before I didn't read it very well!
Quote: Pratt & Whitney’s PW4062 engine will be the standard production engine offering for all future 767 Tanker Programs, both domestic and international.
Pratt & Whitney’s engine, qualified for the 767 commercial series aircraft, was selected based on a best-value evaluation criteria, including engine performance, pricing considerations, management, and quality and schedule history. Pratt & Whitney has also been selected as the 767 Tanker engine provider based on their investment in the core tanker development program.
It would indeed seem odd that Japan and Italy are what you would otherwise call the launch customers for the platform with GE engines and then all of a sudden Boeing comes along right before the decision by the USAF to buy it or not and says P&W are now standard equipment. I can't help but wonder if this was not some sort of payback for say the 777-200LR with the exclusive GE90-115B engine option?
I'm thinking this was sort of a arguably deserved "handout" or way to ensure P&W's prescense in the USAF to compensate for the loss of a lot of P&W engines in USAF inventory.
P&W currently powers C-5A's, B-52's, elder K/R/QC-135, E-8 JSTARS, E-3, C-17, and C-32's.
GE powers B-1 and B-2's, A-10's, C-5B RERP's are going to GE CF6 variants, E-4B and the VC-25's both use GE CF6 variants, KC-10's use GE CF6 variants.
You can see where P&W probably made a "financial" deal with Boeing on the KC-767 so as not to totally loose out on the USAF marketshare.
Spacepope From Vatican City, joined Dec 1999, 3128 posts, RR: 1
Reply 6, posted (9 years 10 months 11 hours ago) and read 3563 times:
Sorta. The C-5's engines are somewhat of a development stage of what eventually became the CF-6, but it's nothing like what you'd see powering even the first DC-10s. Soon the C-5 re-engine program will get into full swing, and these will be powered by true CF-6s.
Drewfly From United States of America, joined Jul 2005, 303 posts, RR: 1
Reply 7, posted (9 years 10 months 10 hours ago) and read 3552 times:
Anything helping P&W is good in my books, Connecticut really needs the jobs. With their commercial business tanking, military projects is just about all they have left. That, and P&WC, which is flourishing.
But on to the topic at hand, the PW 4062s give out 63,300lbs of thrust. The closest match from GE, the CF6-80C2B5F, is rated at 62,100lbs. Could this be the reason? With a lot of the 762ERs out there powered by PW 4056s and other engines in the 56,000lb class, there has to be quite a gain in performance, no?
A-10 Thunderbolt II, ugly as hell, efficient as hell, would you like to meet my boomstick?
Lumberton From United States of America, joined Jul 2005, 4708 posts, RR: 19
Reply 9, posted (9 years 9 months 4 weeks 1 day 4 hours ago) and read 3466 times:
Quoting Spacepope (Reply 6): Soon the C-5 re-engine program will get into full swing, and these will be powered by true CF-6s.
Been trying to find out a source for the status of the C-5 re-engining programing. No luck on Google or past threads. Can anyone provide? I can't recollect whether or not this effort has been funded.
"When all is said and done, more will be said than done".
KC135TopBoom From United States of America, joined Jan 2005, 12253 posts, RR: 51
Reply 11, posted (9 years 9 months 3 weeks 6 days 16 hours ago) and read 3406 times:
Well, if the KC-767 is selected, there will be a new engine selection, too. I would say the GE CF6-50 or CF-6-80 engines would have an advantage since they are already in the USAF inventory (KC-10A, E-4B, VC-25A, and soon on the C-5M). With a all ready in place maintenance system and parts supply line, it will be cheaper for the USAF.
Then again that does not completely rule out the P&W PW-4062 engine, since it has more thrust, and the KC-767 is a twin. The same will go if the KC-330 is selected.
AirRyan From United States of America, joined Mar 2005, 2532 posts, RR: 5
Reply 14, posted (9 years 9 months 3 weeks 5 days 11 hours ago) and read 3342 times:
Anybody notice that on that 2nd pic I posted above that I obtained from the Boeing website that the USAF KC-767 appears to have a Rolls Royce 3 stage engine on it? I think they look good but that'd be a cold day in hell when the USAF selects RR over GE and P&W!