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Boeing YC-14 (Model 953)

United States (1976)
Picture of Boeing YC-14 (Model 953) Tactical Airlifter Transport Aircraft Prototype

The Boeing YC-14 tactical airlifter prototype met USAF expectations but the service moved in another direction - leaving just two examples completed.


Detailing the development and operational history of the Boeing YC-14 (Model 953) Tactical Airlifter Transport Aircraft Prototype.  Entry last updated on 10/23/2017. Authored by Staff Writer. Content ©www.MilitaryFactory.com

The United States Air Force (USAF) attempted to replace the long-running, prop-driven Lockheed C-130 "Hercules" tactical transport during the mid-1970s. With production beginning in 1954, the high-winged, four-engined C-130 had been in service for several decades up to that point and a myriad of variants were ultimately realized when the USAF established the Advanced Medium STOL Transport (AMST) competition of 1968 to seek a standardized successor. From the RFP (Request For Proposal) of 1972, Boeing's entry into the competition became its "YC-14" and this was set against the McDonnell Douglas "YC-15" prototype.

The C-130 set the standard for successful medium-class transports with its high-mounted wings and elevated empennage. The mounting of the engines along these wing elements forced a "T-style" tail unit to be used to help clear prop-wash. The cockpit was set over the short nose assembly for a commanding view and the elevated tail unit allowed for excellent access to the cargo hold from the rear. Performance-wise, the C-130 could operate from little-prepared airfields which added a rugged quality to the series still appreciated today.

With this in mind, Boeing engineers returned with a similar design arrangement in the Model 953 - save for propeller-driven propulsion. Instead, a pair of large turbofan engines took their place on the wing leading edges in the form of 2 x General Electric CF6-50D engines of 51,000lb thrust each - the exhaust blowing over the trailing edge flaps. The operating crew numbered three and internal capacity ranged from 150 combat-ready troops to 69,000lb of cargo. Overall length became 131.7 feet with a wingspan of 129 feet and height of 48.3 feet. Empty weight was 117,500lb against a Maximum Take-Off Weight (MTOW) of 251,000lb.
Boeing and McDonnell Douglas each had their designs selected from a field of five entries and each were awarded prototype contracts for two examples. Boeing prototype 72-1873 went to the air for the first time on August 9th, 1976 and the second example followed as 72-1874 in time. The formal USAF head-to-head competition began in November of 1976 at Edwards AFB and this phase lasted into mid-1977.

In the end, neither design was adopted for further development nor serial production due to the fact that the USAF had begun moving away from tactical-minded airlifters and towards strategic-minded types. To rework the two designs would have required considerable modifications so the AMST program was ended before the start of 1980. From there, the USAF moved on a new initiative - the "C-X" program which yielded the C-17 "Globemaster III" still in service today.

McDonnell Douglas was eventually merged into the Boeing brand label in August of 1997 - thus the C-17 design, originating from McDonnell Douglas, today exists as a Boeing product.






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.

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Relative Maximum Speed Rating
Hi: 750mph
Lo: 375mph
    This entry's maximum listed speed (503mph).

    Graph average of 562.5 miles-per-hour.
City-to-City Ranges
NYC
 
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LON
 
  PAR
PAR
 
  BER
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  MOS
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  TOK
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  SYD
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  LAX
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  NYC
Graph showcases the Boeing YC-14's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
2
2


  * Commercial Market High belongs to Cessna 172.

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


Altitude Visualization
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Origin: United States
Year: 1976
Type: Tactical Airlifter Transport Aircraft Prototype
Manufacturer(s): Boeing Company - USA
Production: 2
Status: Cancelled
Global Operators:
United States (cancelled)
Historical Commitments / Honors:

Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.
Measurements and Weights icon
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Boeing YC-14 model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
3


Dimension
LENGTH


Feet
131.73 ft


Meters
40.15 m


Dimension
WIDTH


Feet
129.00 ft


Meters
39.32 m


Dimension
HEIGHT


Feet
48.39 ft


Meters
14.75 m


Weight
EMPTY


Pounds
117,749 lb


Kilograms
53,410 kg


Weight
LOADED


Pounds
250,996 lb


Kilograms
113,850 kg

Engine icon
Installed Power - Standard Day Performance:
2 x General Electric CF6-50D turbofan engines developing 51,000lb of thrust each.

Performance
SPEED


Miles-per-Hour
503 mph


Kilometers-per-Hour
810 kph


Knots
437 kts


Performance
RANGE


Miles
3,191 mi


Kilometers
5,135 km


Nautical Miles
2,773 nm


Performance
CEILING


Feet
44,997 ft


Meters
13,715 m


Miles
8.52 mi


Performance
CLIMB RATE


Feet-per-Minute
1,935 ft/min


Meters-per-Minute
590 m/min

Armament - Hardpoints (0):

None.
Variants: Series Model Variants
• YC-14 - Base Prototype Designation; two examples completed for testing.
• Model 953 - Boeing company designator