Developed in 1934 as the prototype to the US Army YG-1.  The aircraft can carry two passengers, including the pilot, in tandem seating.  The KD-1 features folding blades.


Data on design, manufacture and status

Design authority: Kellett Autogiro Corporation

Primary manufacturer: Kellett Autogiro Corporation

Parent type: Kellett KD-1

Aircraft status: No longer flying


Primary flight and mechanical characteristics

VTOL type: Gyroplane

Compound type: Lift

Lift configuration: Single main rotor

Dedicated control device: Rudder

Dedicated propulsion devices: 1

Crew required: 1

Crew seating: Tandem

Landing gear: Wheels (non-retractable)

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height:  
Overall Length:  
Overall Width: 12.19 m 40.0 ft
Airframe Dimensions
Airframe Length: 7.87 m 25.8 ft
Airframe Width: 3.15 m 10.3 ft
Airframe Height: 3.12 m 10.2 ft
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track:  
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width:  

Weights and Performance

Data on aircraft weight and flight characteristics

Cruise Speed: 100 mph (160.934 km/h)

Max Gross Weight (ground): 930 kg 2,050 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 930 kg 2,050 lb
Empty Weight: 610 kg 1,345 lb
Useful Load: 320 kg 705 lb
Empty Weight Fraction: 0.656
Climb Performance
Max Rate of Climb: 5 m/s 1,000 fpm
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed: 193 km/h 104 kts
Never Exceed Speed:  
Service Ceiling:  
Range and Endurance
Max Range: 581 km 314 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

Provided powerplant data is for uninstalled, sea level, static operations.

Number of engines: 1
Designation: Jacobs L4MA-7 reciprocating
Manufacturer: Jacobs Aircraft and Engine Company
Normal Ratings
Max continuous:  
Take-off / rated: 168 kW 225 hp
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Main Rotor Characteristics
Diameter: 12.19 m 40.00 ft
Direction of Rotation: Counterclockwise
Hub Type:
Main Rotor Blade Characteristics
Blade Construction:
Blade Chord:  
Blade Tip Geometry:
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 116.75 m² 1256.7 ft²
Disc Loading: 7.96 kg/m² 1.631 lb/ft²
Main Rotor Blade Derived Characteristics
Blade area per blade:  
Tip Speed:  

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Configuration: Unknown
Direction of Rotation: Unknown
Tail Rotor Blade Characteristics
Number of Blades:  
Blade Construction: N/A
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

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