Andre3K wrote:I'm going to assume you are referring to KC-135R Stratotankers. In that case they are pretty much the same engines that 737NG's have, CFM56 engines. The thrust is very similar to the older engines like the J-Stars use but the fuel burn is MUCH lower. They also don't have thrust reverse.
VC10er wrote:So could one say that the scallops on the 787 type engines are a modern day take on the 1960’s “Hush Kits”?!?!
VC10er wrote:Thanks, I had wondered why they have disappeared. I must say I did love (or do love) the look of the chevrons. They are not much, but they are something new that imho, look very cool.
Now that their function can be done without the chevrons- will future 787’s come fitted with engines without the chevrons?
VC10er wrote:Hello, and nice to meet you all,
In 11 years this is my very first thread or post in the Military and Space forum. So, please forgive me for my lack of knowledge.
Buried in the detail of various answers are two related but separate issues.I have been seeing pictures on the landing page here of modified 707 frames. I have noticed (and always wondered) about the new engines on them. What are the new engines?
... wouldn’t those engines provide MUCH more thrust than the original passenger version? If so, what is the impact of those more modern engines?
Is it that additional thrust required for higher MTOW? Or is it just that the 1960’s engines were just too old and beyond maintaining? What are (if any) benefits to performance do they provide? Are they faster at cruising? Etc, etc.
ADent wrote:The E-8 JSTARS are 707 derived aircraft and have been planned to be re-engined with JT8Ds. Looks like only a test frame flew with the new engine though before the project got cancelled.
cpd wrote:Something else with the E6 Mercury, inside the flightdeck it resembles a Boeing 737NG quite a lot:
So not just newer engines, but the flight deck is considerably more modern than B707 aircraft of a bygone era. The newer engines are also as said before not just quieter, but a lot more efficient so the plane becomes a lot more useful.
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