The Hoppi-Copter was a functional backpack helicopter developed by the American company Hoppi-Copters Inc. founded by Horace T. Pentecost in the 1940s.[1] The original Hoppi-Copter consisted of two contra-rotating rotors on a pole attached to a motorized backpack.[2] Although it was capable of flight, it was extremely hard to control.[3]
Later prototypes of the Hoppi-Copter included versions with the pilot in a sitting position, and were in effect miniature one-man helicopters of a more conventional design, though retaining the contra-rotating rotors and thus obviating a tail rotor.[1][4] Despite interest from the British Ministry of Supply in the 102 and 104 models,[5] none were adopted commercially.[3]
^ ab"The Hoppi-Copter" (PDF). Flight. October 14, 1948. Retrieved January 7, 2016.
^Pentecost, Horace T. (17 Oct 1945), US2461347 A, Helicopter adapted to be attached to a pilot, retrieved 2016-01-07
^ ab"Pentecost HX-1 (Model 100) Hoppi-Copter". Smithsonian National Air and Space Museum. Retrieved 2016-01-07.
^ abcBridgman, Leonard (1948). Jane's All the World's Aircraft 1948. London: Sampson, Low, Marston and Co. Ltd. p. 271c.
^ abBridgman, Leonard (1949). Jane's All the World's Aircraft 1949. London: Samson, Low, Marston and Co. Ltd. p. 234c.
^Bridgman, Leonard (1951). Jane's All the World's Aircraft 1951. London: Samson, Low, Marston and Co. Ltd. p. 248c.
April 10, 2024
hoppi, copter, functional, backpack, helicopter, developed, american, company, founded, horace, pentecost, 1940s, original, consisted, contra, rotating, rotors, pole, attached, motorized, backpack, although, capable, flight, extremely, hard, control, pentecost. The Hoppi Copter was a functional backpack helicopter developed by the American company Hoppi Copters Inc founded by Horace T Pentecost in the 1940s 1 The original Hoppi Copter consisted of two contra rotating rotors on a pole attached to a motorized backpack 2 Although it was capable of flight it was extremely hard to control 3 Hoppi CopterPentecost HX 1 Hoppi Copter on display at Pima Air amp Space Museum in Arizona U S Role Backpack helicopterNational origin United StatesManufacturer Hoppi Copters Inc First flight c 1940Later prototypes of the Hoppi Copter included versions with the pilot in a sitting position and were in effect miniature one man helicopters of a more conventional design though retaining the contra rotating rotors and thus obviating a tail rotor 1 4 Despite interest from the British Ministry of Supply in the 102 and 104 models 5 none were adopted commercially 3 Contents 1 Variants 2 Specifications Hoppi Copter 102 3 See also 4 ReferencesVariants editPentecost HX 1 Hoppi Copter Hoppi Copter 100 original back pack version Hoppi Copter 101 equipped with a seat and landing gear proved that more development was necessary 6 Hoppi Copter 102 framed with seat for pilot 4 Hoppi Copter 103 as the 102 but lighter with a more powerful engine and slightly greater rotor diameter Hoppi Copter 104 as the 103 with even greater rotor diameter 5 Hoppi Copter FireflySpecifications Hoppi Copter 102 editData from Jane s All the World s Aircraft 1948 4 General characteristicsCrew One Empty weight 173 lb 78 kg Gross weight 363 lb 165 kg Powerplant 1 Unknown 750 cm3 46 cu in two stroke flat twin 35 hp 26 kW at 4 500 rpm 9 1 1 reduction gearing to rotors Main rotor diameter 2 16 ft 4 9 m Main rotor area 402 sq ft 37 3 m2 totalPerformance Maximum speed 96 mph 154 km h 83 kn all performance figures estimated Endurance 1 hr at cruising speed Service ceiling 12 000 ft 3 700 m hover Disk loading 1 8 lb sq ft 8 8 kg m2 See also editHiller YROE Gyrodyne RON RotorcycleReferences edit a b The Hoppi Copter PDF Flight October 14 1948 Retrieved January 7 2016 Pentecost Horace T 17 Oct 1945 US2461347 A Helicopter adapted to be attached to a pilot retrieved 2016 01 07 a b Pentecost HX 1 Model 100 Hoppi Copter Smithsonian National Air and Space Museum Retrieved 2016 01 07 a b c Bridgman Leonard 1948 Jane s All the World s Aircraft 1948 London Sampson Low Marston and Co Ltd p 271c a b Bridgman Leonard 1949 Jane s All the World s Aircraft 1949 London Samson Low Marston and Co Ltd p 234c Bridgman Leonard 1951 Jane s All the World s Aircraft 1951 London Samson Low Marston and Co Ltd p 248c Retrieved from https en wikipedia org w index php title Hoppi Copter amp oldid 1119922544, wikipedia, wiki, book, books, library,
