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Open Fan

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West

New Member
Joined
Oct 19, 2010
Messages
3
Location
Graz, Austria
Hi everybody,
I hope there is no thread on this topic already, I did a search before but didn't find anything.
I lately just stumbled upon the open fan technology being developed by Boeing and Rolls-Royce.

Aerospace Firms Investigate Open-Fan Propulsion Technology | Defense Technology News at DefenseTalk

open%20fan%20engine.jpg


The benefits seem to be a huge increase in fuel efficiency but there doesn't seem to be very much information on this and I didn't find an answer to a few questions I have:

1. Does the open fan need a turbine directly attatched to it to work efficiently or would it also be suited to use it with a turboshaft setup or even a rotary engine?

2. I think the open fan would only be useful for high speeds and not so much for small airplanes flying at slower speeds (~200mph)?
Or would there be a way of adapting this to an airplane of this size?

3. I might be totally wrong here but the fan design somewhat reminds me of the P-51D. I'm aware that the double-rotor was used to balance the torque, but are there any other benefits to this?

reno01pm0102.JPG


Thanks in advance!
West
 
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