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GE, Nasa To Reunite On Open Rotor Wind-tunnel Test  
User currently offlineAviationbuff From India, joined Mar 2008, 1432 posts, RR: 3
Posted (7 years 7 months 5 days 8 hours ago) and read 5206 times:

GE, NASA to reunite on open rotor wind-tunnel tests


GE Aviation is working with NASA on a wind-tunnel test program to evaluate counterrotating fan-blade systems for an "open rotor" engine design that hearkens back to their joint efforts a quarter of a century ago.

Testing will begin at NASA's Glenn Research Center in Ohio in early 2009 and continue into mid-year, GE said. The company noted that "this is not a full engine test, but a component rig test to evaluate subscale fan systems using GE's and NASA's advanced computational tools and data acquisition systems."

Any speculation on which one will be better (GTF or Open Rotor) in economics.

4 replies: All unread, jump to last
User currently offlineKeesje From , joined Dec 1969, posts, RR:
Reply 1, posted (7 years 7 months 5 days 2 hours ago) and read 5179 times:

I think it is a wise step of the US government to support GE in this.

RR did the same tests earlier this year.

User currently offlineGST From United Kingdom, joined Jun 2008, 944 posts, RR: 0
Reply 2, posted (7 years 7 months 3 hours ago) and read 4991 times:

Quoting Aviationbuff (Thread starter):
Any speculation on which one will be better (GTF or Open Rotor) in economics.

Mt guess is the open rotor will have better fuel economy than the GTF, however open rotor will be very much noisier, so I suspect that the GTF will still get the majority of industry interest in the world of airport noise restrictions in which we live. Not saying open rotor has no future, just that it has further to go before it will be able to compete effectively.

User currently offlineWingscrubber From UK - England, joined Sep 2001, 862 posts, RR: 0
Reply 3, posted (7 years 6 months 4 weeks 1 day 17 hours ago) and read 4951 times:

Sounds more like a next-gen turboprop than competition for the GTF. I think they will have very different efficient flight ranges, but both have potential. I believe the GTF will have the edge in the transonic flight regime - that's where the duct will help.

Resident TechOps Troll
User currently offlineParapente From United Kingdom, joined Mar 2006, 2149 posts, RR: 11
Reply 4, posted (7 years 6 months 3 weeks 6 days 3 hours ago) and read 4850 times:

If GE are going open rotor and RR clearly are, then "we" are! No doubt about it.Unless you believe in group hari kiri! I look forward to the plane designs required to integrate with this technology.

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