Developed from the Dragonfly HR.5., the aircraft was Westland Aircraft's first production helicopter design.

Source: "Westland WS-51, Series 2, Widgeon", David Gibbings, AHS History Calendar 2015

A detailed drawing of the aircraft can be found in the following,

Source: "Westland Widgeon", FLIGHT Staff, FLIGHT 22 Feb 1957, Pages 238-239

Overview

Data on design, manufacture and status

Design authority: Westland Aircraft Ltd

Primary manufacturer: Westland Aircraft Ltd

Parent type: Westland S-51

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: 1

Crew seating: Single seater

Landing gear: Wheels (non-retractable)

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height:  
Overall Length:  
Overall Width:  
Airframe Dimensions
Airframe Length:  
Airframe Width:  
Airframe Height:  
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track: 3.66 m 12.0 ft
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width:  

Weights and Performance

Data on aircraft weight and flight characteristics

Weights
Max Gross Weight (ground): 2,676 kg 5,900 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 2,676 kg 5,900 lb
Empty Weight:  
Useful Load:  
Empty Weight Fraction:  
Climb Performance
Max Rate of Climb:  
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Limitations
Max Level Flight Speed: 163 km/h 88 kts
Never Exceed Speed: 176 km/h 95 kts
Service Ceiling:  
Range and Endurance
Max Range:  
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

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

Powerplant
Number of engines: 1
Designation: Alvis Leonides 521/1 reciprocating
Manufacturer: Alvis Car and Engineering Company Ltd
Normal Ratings
Max continuous:  
Take-off / rated: 388 kW 520 hp
Intermediate:  
Maximum:  
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: 14.63 m 48.00 ft
RPM:  
Direction of Rotation: Counterclockwise
Hub Type: Fully articulated with mechanical hinges for flap lag and pitch
Main Rotor Blade Characteristics
Blade Construction:
Blade Chord:  
Blade Tip Geometry: Sharply tapered tip cap
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 168.10 m² 1809.5 ft²
Disc Loading: 15.92 kg/m² 3.261 lb/ft²
Solidity:  
Main Rotor Blade Derived Characteristics
Blade area per blade:  
Tip Speed:  

Primary Control Device

Data on primary control devices such as tail rotors

By inspection, there appears to be no ‘delta 3’ coupling in-built

Tail Rotor Characteristics
Diameter:  
Configuration: Pusher
Direction of Rotation: Top blade aft
RPM:  
Tail Rotor Blade Characteristics
Number of Blades: 3
Blade Construction:  
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area:  
Solidity:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

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