Болдырев А. И.
Boldyrev A. I.

General data

Producer info

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Names and dates
Project start date
1946
Date of prototype completion
1948
Country of manufacture
Russia
People involved
Alexander Boldyrev {Александр Болдырев}Chief design engineer, Test pilot
Config info
Rotorcraft typeHelicopter
Config
Single rotor
Way of counteracting main rotor torque
Counteracting torque not required
Weights
Maximum Takeoff Weight (MTOW)
125
kg
Manufacturers empty weight (MEW)
42
kg
Cabin and cockpit
Maximum number of people onboard
1
External dimensions
Fuselage length
3.15
m
Fuselage width
1.30
m
Fuselage height
1.83
m
Nose landing gear wheel diameter
0.25
m
Main rotor
Main rotor diameter
4.10
m
Main rotor direction of rotation
Counterclockwise
Number of blades
2
Autodynamic hub’s flapping hinge angle
45
°
Main rotor blade chord
0.20
m
Powerplant
Static thrust
78
N
Performance
Maximum horizontal flight speed (Vh)
100
km/h
Best rate of climb
2
m/s
Miminum rate of descend in autorotation
4
m/s
Maximum flight endurance
0.25
h
0.1084