|Quoting Strathpeffer (Reply 5):|
Quoting Poitin (Reply 4):
The problem with these beasts is the noise they make.
I thought the noise problem with UDFs was outside the aircraft - this cannot be so easily controlled yet, or can it?
|Quoting Philb (Reply 7):|
I saw the MD-80 UDF demonstrator at Farnborough and, from the outside, it wasn't particularly noisy - the problem was internal noise and some vibration down the back end due to the proximity of the contra rotating blades to the airframe.
A mid or overwing mounting could do away with those problems.
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