GRAMLING VTOL

Over the last eight years this device was conceived, patented, prototyped and tested by William Gramling,retired engineer and veteran. The whole purpose of this device, which is not a ducted fan, is to offer an aerodynamic lift platform which, when one or more are fitted with an appropriate fuselage/cabin, creates an aircraft capable of VTOL flight... Most importantly, it achieves this with the high efficiency of fixed-wing aircraft, normally three to five times higher than rotary wing aircraft, based on maximum takeoff weight. This combination offers viable, efficient and quiet, electrically-powered, and hybrid long-range commuter vehicles and commercial cargo carriers... The prototype is primarily composite construction. The bellmouth intake adds some lift with air being drawn over the curved surface, creating a low pressure area. Two identical fans on a common driveshaft are 40 inch, 12 blade and 38.5 degree twist. They produce 50,000 cu.ft./min. at 2000 rpm and require 90 hp...

Primary location: Montoursville United States