Stirling From Italy, joined Jun 2004, 3943 posts, RR: 26 Reply 4, posted (8 years 7 months 1 day 1 hour ago) and read 1498 times:
I was thinking along the lines of the RR Trent 556.
CFMs on a Convairliner? That would be a sight to see!
Since it most likely would only need one! Put that baby on top of the fuselage!
Kinda like one of those first generation German fighters! (btw, which one am I thinking about?)
So, I'll ask again, with more clarity...Can the powerplants on the A340-200 and A340-300 be uprated?
Now if the could just do something about that odd landing gear arrangement on the A345, which is - BTW, other than that gear - one of my favorite airplanes looks wise!
Quoting Stirling (Thread starter): Is it possible for an A340-200 or A340-300 to have it's powerplants upgraded ala' the DC-8-70 series, KC-135R, and Convairliner (CV-240/340/440)
I don't see why not, in theory it should be possible. However IMO, I would guess that for the payback on a fairly new airplane with good engines it would be cost prohibitive. What would be the point of replacing the engines exactly?
Stirling From Italy, joined Jun 2004, 3943 posts, RR: 26 Reply 11, posted (8 years 7 months 1 day ago) and read 1393 times:
Quoting KC135R (Reply 6): What would be the point of replacing the engines exactly?
Down the road....
In the advent more efficient engines come along?...or maybe an existing operator that might need to increase MTOW increase for range, or for enhanced take-off performance from less than ideal airports...?(but that would probably require MUCH MORE engineering than just slapping some new fans under the wings)
Or, possibly an airline that might not be unable to justify the expense of a newer model -500 or -600...?
Yeah...Like the C-17 with its 4 PW2040's FYI, and it's TO performance is quite impressive, especially for such a "rotund" airplane!
Quoting Stirling (Reply 11): (but that would probably require MUCH MORE engineering than just slapping some new fans under the wings)
The KC-135 got a whole modernization with the CFM's including re-skinned wings, new wiring, new struts, new engine struts (to accommodate the new engines of course), and the engines - which effectively doubled the airplanes total thrust capability. Oh yeah, plus, the CFM56 makes the coolest noises when it throttles up, IMO of course!
Rikkus67 From Canada, joined Jun 2000, 1521 posts, RR: 2 Reply 15, posted (8 years 7 months 23 hours ago) and read 1294 times:
I realize this post is about re-engining the A340, however....
When suggesting the re-engining of the Convair, I believe there was a misquote. The 240,340, and 440 were the largest fleet of airliners ever to get the engine upgrade...these became 540, 600, and 640's IIRC.
There was also a proposal to put CFM-56's on the CV880 and CV990 fleet**, as the usable lifespan of those airframes were still favorable. However, the re-engining would have involved replacing the 4 engines with 2....and the proposal obviously never went past that. I imagine climb rate and cruise speed would still be comarable to the original performance...a crotch rocket among 4 holers...
(**the very last 707 was initially reengined with CFM-56's also.... the powerplants were eventually changed back to JT3D's, when airlines were looking at the 757 more than another re-engined 1st gen. jet)