The VAK 191B was originally designed to be a low altitude nuclear strike fighter for NATO. The project was funded by both Germany and Italy (on a 60/40 basis) with VFW and Fiat Aviazione the primary airframe companies and Rolls-Royce/MTU responsible for the engines.

The aircraft used two Rolls-Royce/MTU RB.162-81 lift engines (6,000 lb thrust each), one mounted directly behind the cockpit and one aft of the wing, plus a MTU/Rolls-Royce RB.193-12 vectored thrust turbofan engine (10,163 lb thrust) mounted between them. The RB.193 was a scaled down version of the Roll Royce Pegasus engine used on the Kestrel/Harrier.

The program was canceled due to a change in NATO strategy.

Source: "VFW VAK 191B", AHS V/STOL Wheel

and,

Source: "Italian V/STOL Concepts of the Twentieth Century", Michael J. Hirschberg; Thomas Müller and Erasmo Piñero, Presented  at  the  American  Helicopter Society 59th Annual  Forum, Phoenix, Arizona, May  6-8, 2003

Overview

Data on design, manufacture and status

Design authority: Vereinigte Flugtechnische Werke

Primary manufacturer: Vereinigte Flugtechnische Werke

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Jet lift VTOL

Compound type: N/A

Lift configuration: Combined lift devices (x3)

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: 3
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):  

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