DeGraw R.: Hummingbird

General data

Producer info

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Names and dates
Market original model designation
Hummingbird
Market model designation (english translation or spelling)
Hummingbird
Project start date
1978
(...)
1981-12
First flight date and time
1984-07-20
Country of manufacture
USA
Config info
Rotorcraft typeHelicopter
Config
Intermeshing
Weights
Maximum Takeoff Weight (MTOW)
726
kg
Manufacturers empty weight (MEW)
535
kg
(...)
497
kg
Cabin and cockpit
Maximum number of people onboard
2
External dimensions
Fuselage length
5.08
m
Height
2.44
m
Main rotor
Main rotor diameter (System no.: 1)
7.77
m
(...)
7.70
m
Main rotor diameter (System no.: 2)
7.77
m
(...)
7.70
m
Main rotor direction of rotation (System no.: 1)
Counterclockwise
Main rotor direction of rotation (System no.: 2)
Clockwise
Main rotor angular speed
425
rpm
Angle between shafts' axes.
26
°
Distance between main rotor hubs
0.61
m
Main rotor blade chord
0.20
m
Powerplant
Engine model
VW 1835
(...)
Volkswagen
Engine type
Piston
Number of engines
2
Total maximum power
140
HP
(...)
72
HP
0.0984