The Hawker/Bristol funded P.1127 development began in 1957. The Bristol Pegasus engine (originally with only 11,000 lb thrust) was developed for the aircraft with heavy US funding support. It was based on the earlier Orpheus engine, and had a bifurcated jetpipe and vectoring front and rear nozzles.

The P.1127 made its first hover on 21 October 1960 on tethers, but this was not considered to be beneficial to feel out the aircraft response, so the first untethered hover was made less than a month later, on 19 November 1960. First conventional flight was made on 7 July 1961 and first double transition on 12 September 1961. Control power was low about all axes, which, combined with suck-down and limited height control power, resulted in a high pilot workload in hover. Hot gas ingestion was overcome with a low forward speed in takeoff and landing. One of the two initial test aircraft crashed, with the pilot ejecting safely. The British government began supporting the development before the first flight, funding the first two prototypes, and later four more.

Source: AHS V/STOL Wheel

Overview

Data on design, manufacture and status

Design authority: Hawker-Siddeley Aviation

Primary manufacturer: Hawker-Siddeley Aviation

Parent type: Hawker Harrier

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Jet lift VTOL

Compound type: N/A

Lift configuration: Vectored thrust (x4)

Dedicated control device: Thruster (x4)

Crew required: 1

Crew seating: Single seater

Landing gear: Wheels (all 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:  
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):  
Max Gross Weight (airborne):  
Max Take-off Weight:  
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:  
Never Exceed Speed:  
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
Normal Ratings
Max continuous:  
Take-off / rated:  
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:  
RPM:  
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:  
Solidity:  
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
Diameter:  
Configuration: Unknown
Direction of Rotation: Unknown
RPM:  
Tail Rotor Blade Characteristics
Number of Blades:  
Blade Construction: N/A
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area:  
Solidity:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

Related VFS Resources

Resources related to the P.1127 , provided by the Vertical Flight Society.
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Related Public Resources

Resources related to the P.1127 , provided by public sources across the internet.

Images