Variable Pitch Propfan [Futurepath: The Story of Research and Technology at NASA LeRC]
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- čas přidán 12. 09. 2024
- The video presents material concerning Advanced Turboprop programs. Additionally, material covering the development of power systems for Freedom is shown.
They never solved the noise and vibration problem. The logical step forward is go with low blade loading + low rpm / low tip speed design to reduce wake energy density which is the primary source of noise and vibration in props / fans. AVOID coaxial setup. Mount the fans on the wings as tractor and profile the wings to recover some of the spinning airflow into thrust or even use the spinning flow to counteract spanwise flow of the wings!! With low enough blade loading, you won't be having any vibration and noise issues even if the fans are tractor wing-mounted. You also improve short field performance as well.
Can I have the copy of source, it is very interesting to review this technology
Well at least the Russians are making Progress, pun intended.
What happened to the Dunducted fan engine developed by General Electric?
JLS Leo the GE90 came along, which was better and other engines based on a similar philosophy.
Well it "...withered on the vines for some reason or another..." all over again, you never see these anywhere in practical use, not even on electric?
super invention le pich propeller de chez saab recuperé pour utilisation sur avion rc en aerobatique
Sadly, the ATP withered on the vine yet again.