C-130H Eight-Bladed NP2000 Prop Upgrade Plans Cut Short By USAF

Refitting C-130Hs with NP2000 propellers offers performance and maintenance benefits, but the USAF is fully focused on buying ...
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This 727 had Tail Propellers (and sounded like a saw)

In the late 1980s, the Boeing corporation planned to create an unusual airplane with one of the latest technological advances of its time - propfan engines. The company wanted this new aircraft to ...