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Folland Fo.147


Swing-Wing Trainer / Light Strike Proposal


United Kingdom | 1961



"The Folland Fo.147 was proposed as an evolution of the Folland Gnat lightweight fighter-trainer with a built-in swing-wing capability."



Authored By: Staff Writer | Last Edited: 06/21/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
Into the 1960s, the British Royal Air Force (RAF) found itself in need of a budget-minded Advanced Jet Trainer (AJT) with inherent light strike capabilities. This led to a series of design brochures being published by the various British aero-industry players of the day. The Folland Fo.147 became a product of this period and held roots in the classic twin-seat, single-engine Folland "Gnat" fighter-trainer of 1959 (this aircraft is detailed elsewhere on this site). The Gnat found modest value on the global stage for its time, serving in the air forces of Britain, Finland, and India.

The Fo.147 was formed from the proposed supersonic, missile-armed, twin-seat, twin-engine Gnat Mk.5 fighter-trainer model. Key to Fo.147's design was integration of a "Variable Geometry" (VG) - or "swing wing" - capability in an effort to exact every ounce of speed and performance from the compact aircraft. Folland engineers believed that a VG arrangement in the Gnat could bring about speeds in excess of Mach 2 all the while retaining the proven inherent qualities of the existing aircraft - in this way, the revision would help increase all performance aspects of the original including operational range, straight-line speed, and operating ceiling.

Within the Fo.147 application, the wing sweep mechanism would allow the mainplanes to actively sweep (as needed) from an angle of 20 degrees to as much as 70 depending on the current flight phase - allowing the modified Gnat to operate equally-effectively at both low- and high-speed flying envelopes. Power would be provided through 2 x Rolls-Royce RB.153R series afterburning turbojet engines in a side-by-side arrangement within the body of the aircraft - these aspirated by side-fuselage intakes.

Another unique quality of the Fo.147 proposal, beyond its intended swing-wing capability, was the use of a rotating/retracting canard foreplane unit ahead of the cockpit section. This would take the place of any horizontal tailplanes in the design, leaving just the single vertical fin mounted aft of, and above, the engine installations.

A tandem, two-seat cockpit would feature pressurized workspaces for the crewmen and ejection seats were a must for enhanced survivability. Like the proposed Gnat Mk.5, the Fo.147 could be equipped with an Airborne Interception (AI) radar in the nose, most likely the Ferranti AI.23 series unit. Ground-running would be made possible by a retractable tricycle arrangement.

Dimensions included an overall length of 51 feet with a wingspan measuring 36.5 feet. Gross weight reached 18,500lb. With its engine pairing and unique wing arrangements, Folland engineers estimated their unique aircraft to have a maximum speed of Mach 2.2 with near-Mach 3 speeds deemed possible at some point.

While the Fo.147 and its related aircraft, the proposed Fo.148 featuring a more conventional tail unit, were ultimately abandoned, the requirement was eventually filled by the SEPECAT "Jaguar" (detailed elsewhere on this site). Beyond a single prototype, thirty-eight "Jaguar B" / Jaguar T.2 AJTs, offering an inherent secondary attack functionality, were taken into service.

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Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Folland Fo.147 Swing-Wing Trainer / Light Strike Proposal.
2 x Rolls-Royce RB153R afterburning turbofan engines of unknown thrust output.
Propulsion
1,687 mph
2,715 kph | 1,466 kts
Max Speed
50,033 ft
15,250 m | 9 miles
Service Ceiling
1,087 miles
1,750 km | 945 nm
Operational Range
20,250 ft/min
6,172 m/min
Rate-of-Climb
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Folland Fo.147 Swing-Wing Trainer / Light Strike Proposal.
2
(MANNED)
Crew
51.0 ft
15.55 m
O/A Length
36.6 ft
(11.15 m)
O/A Width
8.9 ft
(2.70 m)
O/A Height
14,110 lb
(6,400 kg)
Empty Weight
18,519 lb
(8,400 kg)
MTOW
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
RANGE
ALT
SPEED
Armament
Available supported armament and special-mission equipment featured in the design of the Folland Fo.147 Swing-Wing Trainer / Light Strike Proposal .
Assumed support for gun pods, rocket pods, and conventional drop bombs of the Cold War period.
Variants
Notable series variants as part of the Folland Fo.147 family line.
Fo.147 - Base Project Designation; cancelled.
Operators
Global customers who have evaluated and/or operated the Folland Fo.147. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 0 Units

Contractor(s): Folland Aircraft - UK
National flag of the United Kingdom

[ United Kingdom (abandoned) ]
Relative Max Speed
Hi: 1700mph
Lo: 850mph
Aircraft Max Listed Speed (1,687mph).

Graph Average of 1,275 MPH.
Era Crossover
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
Aviation Timeline
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Postwar
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Future
1 / 1
Image of the Folland Fo.147
Image copyright www.MilitaryFactory.com; No Reproduction Permitted.

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
GROUND ATTACK
X-PLANE
TRAINING
ADVANCED TRAINING
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The Folland Fo.147 Swing-Wing Trainer / Light Strike Proposal appears in the following collections:
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