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CONVAIR XFY Pogo

Experimental Vertical Take-Off and Landing (VTOL) Fighter Prototype

CONVAIR XFY Pogo

Experimental Vertical Take-Off and Landing (VTOL) Fighter Prototype

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
MEDIA
OVERVIEW



The CONVAIR XFY Pogo was a study in the viability of a VTOL fighter aircraft - only three were built and only one ever flown.
National Flag Graphic
ORIGIN: United States
YEAR: 1954
STATUS: Cancelled
MANUFACTURER(S): CONVAIR - USA
PRODUCTION: 3
OPERATORS: United States (cancelled)
SPECIFICATIONS



Unless otherwise noted the presented statistics below pertain to the CONVAIR XFY-1 model. Common measurements, and their respective conversions, are shown when possible.
CREW: 1
LENGTH: 32.15 feet (9.8 meters)
WIDTH: 27.56 feet (8.4 meters)
HEIGHT: 22.90 feet (6.98 meters)
WEIGHT (EMPTY): 11,155 pounds (5,060 kilograms)
WEIGHT (MTOW): 16,248 pounds (7,370 kilograms)
ENGINE: 1 x Allison YT40-A-14 turboprop engine developing 5,100 horsepower while driving 2 x Three-bladed contra-rotating propellers.
SPEED (MAX): 475 miles-per-hour (765 kilometers-per-hour; 413 knots)
RANGE: 500 miles (805 kilometers; 435 nautical miles)
CEILING: 37,533 feet (11,440 meters; 7.11 miles)
RATE-OF-CLIMB: 9,985 feet-per-minute (3,043 meters-per-minute)




ARMAMENT



PROPOSED (STANDARD):
4 x 20mm cannons

PROPOSED (OPTIONAL):
48 x 70mm Mk 4 FFARs (Folding-Fin Aerial Rockets)
VARIANTS



Series Model Variants
• XFY - Base Product Designation
• XFY-1 - Prototype Designation
• "Pogo" - Product Name


HISTORY



Detailing the development and operational history of the CONVAIR XFY Pogo Experimental Vertical Take-Off and Landing (VTOL) Fighter Prototype.  Entry last updated on 11/2/2017. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
Both the CONVAIR XFY "Pogo" and Lockheed XFV were developed to a 1950 United States Navy (USN) requirement intended to test the viability of a "tail-sitting" shipborne fighter for arming and protecting convoys and for providing a quick-reaction point defense capability to warships in general. The aircraft were described as tail-sitters due to their vertical stance when at rest, taking-off or landing. In this fashion, the aircraft held a small, compact footprint on the space-strapped decks of USN ships then in service and could be called into action in short order. Several programs attempted the same end-goal during this post-World War 2 period and included the French-originated SNECMA "Coleopter". In the end, the CONVAIR work netted three aircraft with only one flyable example. Similarly, the Lockheed submission could claim just one flyable example between its two prototypes completed.

The CONVAIR submission was designated "XFY-1" and was also known as the "Model 5". As in the Lockheed entry, the CONVAIR aircraft utilized a conventional propulsion package, held equal-span tailfins (both ventrally and dorsally with all four wing tips capped by small castor wheels), and seated a sole pilot over the nose. As designed, the XFY featured a unique pivoting system for the pilot's ejection seat allowing the whole unit to tilt 45-degrees when the aircraft sat in the vertical position and level out when the aircraft switched to horizontal flight. The ventral tailfin was also made jettisonable in the event an emergency landing was required of the aircraft. Unlike the XFV, the XFY was given a modified delta-planform for its wing mainplanes.

The USN ordered three prototypes from CONVAIR in March of 1951.

Power to the design would initially come from an Allison YT-40-A engine of 5,850 horsepower and a ch a later switch would be made to the still-in-development XT40-A-16 of 6,966 horsepower output. This was the same plan for the competing Lockheed XFV. The XFY's engine fit would be used to drive 2 x three-bladed propeller units in contra-rotating fashion at the nose.




CONVAIR XFY Pogo (Cont'd)

Experimental Vertical Take-Off and Landing (VTOL) Fighter Prototype

CONVAIR XFY Pogo (Cont'd)

Experimental Vertical Take-Off and Landing (VTOL) Fighter Prototype



The XFY was also slated to carry a similar armament load to its rival - 4 x 20mm cannons fitted to two wingtip pods or 48 x 2.75" aerial rockets in their place. The wingtip pods allowed for the weapon's firing clearance of the large, broad spinning propeller blades.

A prototype example completed its first tethered flight on April 19th, 1954 and managed a first flight (a vertical take-off and landing action) on August 1st, 1954 (the Lockheed submission was "first-to-fly" on June 16th of that year). On November 2nd, 1954, the aircraft completed its first vertical take-off to horizontal flight transition - something not accomplished by the Lockheed entry.

The sole flyable XFY example managed 60 hours in the air before the VTOL program was cancelled by the USN. The major deficiencies in the CONVAIR design were a lack of an effective air braking measure when attempting to transition to vertical landing and the inherently difficult -and dangerous - landing action altogether which itself required a steady and experienced hand "at the stick". Beyond these factors, the aircraft's estimated performance would never match that of the newest enemy fighter jets coming online. As such the final flight of the XFY occurred during November of 1956 ending several years of useful testing.

Like the Lockheed XFV, the CONVAIR XFY was saved from the scrap heap and currently (2016) resides in storage at the National Air and Space Museum in Maryland. Reported performance specifications included a maximum speed of 475 miles per hour, a range out to 500 miles, a service ceiling of 37,500 feet, and a rate-of-climb of 9,980 feet-per-minute.




MEDIA









Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

Image of collection of graph types

Relative Maximum Speed Rating
Hi: 500mph
Lo: 250mph
    This entry's maximum listed speed (475mph).

    Graph average of 375 miles-per-hour.
City-to-City Ranges
NYC
 
  LDN
LDN
 
  PAR
PAR
 
  BER
BER
 
  MSK
MSK
 
  TKY
TKY
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the CONVAIR XFY-1's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
3
3

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


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Supported Roles
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Utility/Transport
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X-Plane/Development
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Supported Arsenal
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