The aircraft was the third iteration of the development of the Servotec Grasshopper, originally designed by Dipl. Ing. J. S. Shapiro


Data on design, manufacture and status

Design authority: Cierva Rotorcraft Ltd.

Primary manufacturer: Cierva Rotorcraft Ltd.

Parent type: No type defined

Aircraft status: No longer flying


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Coaxial (x2)

Crew required: 1

Crew seating: Side-by-side

Landing gear: Skids

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height:  
Overall Length:  
Overall Width: 9.75 m 32.0 ft
Airframe Dimensions
Airframe Length: 5.59 m 18.3 ft
Airframe Width: 1.58 m 5.2 ft
Airframe Height: 2.82 m 9.3 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

All performance data assumed to be at ISA SL

Max Gross Weight (ground): 1,383 kg 3,049 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 1,383 kg 3,049 lb
Empty Weight: 739 kg 1,629 lb
Useful Load: 644 kg 1,420 lb
Empty Weight Fraction: 0.534
Climb Performance
Max Rate of Climb: 6 m/s 1,230 fpm
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed: 177 km/h 96 kts
Never Exceed Speed:  
Service Ceiling: 3,658 m 12,001 ft
Range and Endurance
Max Range: 402 km 217 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

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

Number of engines: 2
Designation: RR Continental O-300 reciprocating
Manufacturer: Rolls-Royce Continental
Normal Ratings
Max continuous:  
Take-off / rated: 108 kW 145 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
Direction of Rotation: Unknown
Hub Type:  
Main Rotor Blade Characteristics
Blade Construction:  
Blade Chord:  
Blade Tip Geometry:  
Blade Twist:  
Number of Blades:  
Main Rotor Derived Characteristics
Disc Area:  
Disc Loading:  
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):  

Related VFS Resources

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Related Public Resources

Resources related to the CR.LTH-1 Grasshopper III, provided by public sources across the internet.