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CMF Studies "Open Rotor" Concept  
User currently offlineScbriml From United Kingdom, joined Jul 2003, 15358 posts, RR: 45
Posted (9 years 3 weeks 1 day 13 hours ago) and read 7038 times:
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In an article at FlightGlobal, CFM are reported to be studying an open rotor concept for the next generation of airliner engines.


The open rotor concepts, one of which was revealed recently by CFM partner Snecma, include pusher, counter-rotating designs very similar to the General Electric GE36 unducted fan (UDF) study of the 1980s, as well as puller-type designs.

Of more interest to me personally, are some of the quoted time-frames for the introduction of new-technology engines for A320 and 737 replacements:

However the company cautions that the more advanced concepts are still years away from fruition. Any open rotor design would not be ready for service until "very late in the second decade at the earliest," says CFM executive vice president Bill Clapper.

There's also some interesting information about the LEAP56 initiative.

Time flies like an arrow. Fruit flies like a banana!
3 replies: All unread, jump to last
User currently offlineSBN580 From United States of America, joined Mar 2005, 401 posts, RR: 3
Reply 1, posted (9 years 3 weeks 1 day 12 hours ago) and read 6981 times:

So there is the possiblity then of reviving the pusher prop-jet concept? I would assume these would have to be rear mounted engines. Wing mounted pusher prop would require quite a bit wing and pylon mount redesign I would think.

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User currently offlinePoitin From , joined Dec 1969, posts, RR:
Reply 2, posted (9 years 3 weeks 1 day 12 hours ago) and read 6972 times:

I wonder if they have a fix for the noise these types of configurations made in past attempts. Still if they can make it quiet enough the technology makes a lot of sense with oil at $60 USD per barrel.

User currently offlineDEVILFISH From Philippines, joined Jan 2006, 5569 posts, RR: 1
Reply 3, posted (9 years 3 weeks 1 day 6 hours ago) and read 6788 times:

Also posted here.....

Next Gen NB Engines : Contra Rotating Turbofan Fan (by Keesje Apr 27 2007 in Tech Ops)

[Edited 2007-05-08 21:16:36]

"Everyone is entitled to my opinion." - Garfield
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