laugh? Thanks A-Floor
A-Floor you made me laugh, the unfanned duct indeed.
Seriously. Bad idea.
Just as a harp is a nude piano, the UDF is, if not nude, at least a topless jet and is going to have every vice that high speed prop aircraft have and none of the virtues of its lower speed siblings because “ye cannae change the laws of physics”.
Whenever the topic of the UDF arises (and it does every other month) I am reminded of Professor Richard Shevell, of DC-9 and DC-10 fame. When asked where he “saw” the propfan he would reply “On somebody else’s airplane!”
He also used to say that if any of his first year students could not utterly condemn the project in 100 words or less he would see them off to another university.
Dentists and paint sprayers thought it wonderful. My late father who had something to do with it called it the McGonagal Doneless Propbang. He was being kind.