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Originally posted by ghost
Mainly fasion! most people think the propeller isn't cool. Personally, I would love to see propfans on aircraft. Even though I like some modern designs, I've always liked the way the propeller looks, especally the modern ones.
Originally posted by gfad
In terms of stealth you might as well stick a barn door on the plane.
Creates a noisier cabin environment.
Originally posted by kilcoo316
Sorry guys, the decision was mainly fashion (along with noise).
The An-70 has a cruise sfc of less than half that of the B767!
A propfan can also reach the high subsonic speeds of airliners.
I know for a fact a strong reason for the current regional jets all being... well jets is the 'modern look' of a ducted engine. Bull Gunston's 'The Jet Engine' covers it quite well.
Originally posted by PisTonZOR
It was not because of fashion! If you think that, please tell me why the Bombardier Q400 is used much more than CRJs on some routes?
The issue, was yes, noise, and maintainence. Also the 767 is old tech, compare it to GEnx. If you were Boeing, would you decide against having 30% less fuel burn against you're compeditor because of fashion?
Also tell us you're source for the SFC. Renember, MD80 engines are old tech, 767 engines are better, and genx have a SFC of 15% less than that. That would make the SFC of propfan comparable to the GEnx.
Firm orders for the CRJ family of regional jets - the most successful regional aircraft program in history - as of August 31, 2004 stood at 1,380 aircraft. Conditional orders and options could increase the program by a further 1,140 Bombardier CRJ Series aircraft.
A strong order intake in the last 18 months has resulted in an increase in the Q400 production rate. There is also keen interest in the 50-passenger Bombardier Q300 turboprop as demonstrated by Qantas Airways' order of seven Q300 in the last 10 months and a number of solid prospects for the future. As of August 31, 2004, the Bombardier Q400 firm order book stood at 114 aircraft, of which 85 had been delivered to 11 operators around the world.
Originally posted by Zaphod58
Don't count on it. The 717 didn't do well as a jet, so I don't see it doing very well as a prop.