This is GE's UDF (for UnDucted Fan) project. Theory was that the high
efficiency blades would add up to better fuel consumption. The program
was never brought to market. The image you posted is one of the flying
testbeds (possible the only, although I think there might have been a
727 used first).

Darkwing Duck (The Duck, The Myth, The Legend) wrote:
http://www.airliners.net/open.file?id=537804

Anyone know what those fins/blades are all about?




--
Remove "2PLANES" to reply.