Kolak A.: K-6 Ćwirbel
Kolak A.: K-6 Cwirbel

General data

Producer info

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Names and dates
Market original model designation
K-6
Market model designation (english translation or spelling)
K-6
Original model name
Ćwirbel
Model name (english translation or spelling)
Cwirbel
Date of prototype completion
1980
First flight date and time
1982
Country of manufacture
Poland
People involved
Adam KolakConstructor, Test pilot
Config info
Rotorcraft typeAutogyro
Weights
Maximum Takeoff Weight (MTOW)
270
kg
Manufacturers empty weight (MEW)
176
kg
Cabin and cockpit
Maximum number of people onboard
1
External dimensions
Length
3.25
m
Width
1.45
m
Height
2.20
m
Main landing gear wheel diameter
0.30
m
Main landing gear wheel width
0.12
m
Nose landing gear wheel diameter
0.30
m
Nose landing gear wheel width
0.12
m
Main rotor
Main rotor diameter
7
m
Prerotation
Yes
(...)
No
Prerotation type
Dedicated IC engine
Max main rotor angular speed in prerotation
250
rpm
Main rotor blade chord
0.20
m
Main rotor mass
15
kg
Propeller
Propeller diameter
1.25
m
Propeller material
Wood
Thrust
932
N
Transmission reduction ratio
1
Powerplant
Engine model
Volkswagen 1500
(...)
Volkswagen 1200
Engine model (english translation or spelling)
Volkswagen 1500
(...)
Volkswagen 1200
Number of engines
1
Total maximum power
60
HP
Angular speed at max power
4200
rpm
Fuel system
Fuel tank capacity
20
l
Average fuel consumption [volumetric]
10
l/h
Performance
Maximum horizontal flight speed (Vh)
120
km/h
Minimum speed
30
km/h
Take-off distance
50
m
Best rate of climb
2.80
m/s
Maximum flight endurance
2
h
0.12