Katerina Swanson
The KC-135 Stratotanker is a long-range, high-altitude, high-speed jet transport aircraft used for aerial refuelling. It is similar in design to the Boeing 707 commercial airliner. The Stratotanker has a fuel capacity of 202,800 pounds of JP-4 jet fuel, which can be offloaded at a rate of 6,500 pounds per minute. The aircraft has been in service with the United States Air Force for over 60 years, providing aerial refuelling support to Air Force, Navy, and Marine Corps aircraft, as well as aircraft from allied nations.
| Characteristics | Values |
|---|---|
| Aircraft Type | KC-135 Stratotanker |
| Manufacturer | Boeing |
| Based On | Boeing 707 Commercial Airliner |
| First Flight | 31 August 1956 |
| Entered Service | 28 June 1957 |
| Role | Aerial Refueling |
| Fuel Capacity | 202,800 lbs of JP-4 Jet Fuel |
| Fuel Offload Rate | 6,500 lbs per minute |
| Fuel Cells | Nylon Fabric, Weighing 80 lbs Each, Holding 7 Tons of Fuel |
| Fuel Transfer Method | Flying Boom with Shuttlecock-Shaped Drogue Attachment |
| Crew | 4 (2 Pilots, 1 Navigator, 1 Boom Operator) |
| Cargo Capacity | 83,000 lbs or 80 Passengers |
| Speed | High Speed |
| Range | Long Range |
| Altitude | High Altitude |
| Modifications | KC-135R with CFM-56 Engines, Improved Fuel Efficiency and Cost Savings |
| Cost | $2.2 Billion Total Operation and Support Cost in FY 2001 |
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What You'll Learn
The KC-135 Stratotanker can carry 202,800 pounds of jet fuel
The Stratotanker is a swept-wing, long-range, high-altitude, high-speed jet transport. It is structurally similar but not identical to the Boeing 707 commercial airliner. The Stratotanker features integral wing tanks between the spars, and further tanks in the lower lobe of the fuselage, making a total of 22. The fuel cells are made of nylon fabric less than one-sixteenth of an inch thick, and a cell weighing 80 pounds will hold seven tons of fuel. The fuel system is managed from the cockpit by the co-pilot.
The Stratotanker's flying boom is its primary method of fuel transfer. A special shuttlecock-shaped drogue can be attached to the boom and trailed behind to refuel aircraft fitted with probes. The drogue method is less forgiving of pilot error in the receiving aircraft compared to conventional trailing hose arrangements. The Stratotanker can also be fitted with wingtip hose-and-drogue and air refueling pods to refuel aircraft with boom receptacles.
The KC-135R, a re-engined and enhanced version of the Stratotanker, can offload 50% more fuel and is 25% more fuel-efficient, cheaper to operate, and quieter than the KC-135A. The Stratotanker has received several upgrades over the years, and the US Air Force continues to work on improvements, including modernizing the cockpit.
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It can also carry 83,000 pounds of cargo
The KC-135 Stratotanker is a military aircraft used primarily for aerial refuelling. It has been in service with the US Air Force for over 60 years and has received several upgrades since its first flight in 1956. The Stratotanker's primary mission is to refuel compatible US Air Force, Navy, and Marine Corps aircraft, as well as aircraft from allied nations.
The Stratotanker's ability to carry and transfer fuel has been pivotal in aerial warfare, particularly in Southeast Asia. By providing mid-air refuelling, the Stratotanker extends the range of combat aircraft, allowing them to spend more time in target areas without being limited by fuel supplies. This capability has significantly altered the nature of aerial conflicts, bringing far-flung bombing targets within reach.
In addition to its primary refuelling role, the KC-135 Stratotanker can also carry a substantial amount of cargo. Depending on the fuel storage configuration, the aircraft can carry up to 83,000 pounds (approximately 37,648-38,000 kg) of cargo. This cargo capacity enhances the Stratotanker's versatility, allowing it to transport a significant amount of supplies or equipment in addition to its refuelling capabilities.
The ability to carry 83,000 pounds of cargo provides the KC-135 Stratotanker with increased operational flexibility. It can support military operations by delivering essential supplies, equipment, or even troops to remote locations. This dual role as a tanker and cargo aircraft expands the Stratotanker's utility beyond just refuelling, making it a valuable asset for the military.
The cargo capacity of the Stratotanker also enables it to adapt to various mission requirements. Depending on the specific needs of a mission, the aircraft can be configured to carry a combination of cargo and fuel. This adaptability ensures that the Stratotanker can respond effectively to diverse and changing situations, contributing to its effectiveness in supporting military operations.
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The Stratotanker's primary mission is to refuel US Air Force aircraft
The KC-135 Stratotanker is a long-range, high-altitude, high-speed jet transport aircraft that has provided the core aerial refuelling capability for the US Air Force for over 60 years. The Stratotanker's primary mission is to refuel compatible US Air Force aircraft, as well as aircraft from the Navy and Marine Corps, and those of allied nations.
The Stratotanker's ability to refuel aircraft in mid-air has been a game-changer for aerial warfare. It has allowed combat aircraft to reach far-flung bombing targets that were previously out of reach due to limited fuel supplies. With the Stratotanker's support, fighter missions can spend hours at the front instead of just a few minutes. The KC-135 is equipped with a flying boom for fuel transfer, and a special drogue can be attached to the boom to refuel aircraft fitted with probes. The Stratotanker can carry 202,800 pounds of JP-4 jet fuel, most of which is transferable for global refuelling missions.
The Stratotanker has undergone several upgrades since its first flight in 1956. The KC-135R, a re-engined and enhanced version, can offload 50% more fuel and is significantly more fuel-efficient and cheaper to operate than its predecessor. The US Air Force continues to improve the Stratotanker with the Multi-Point Refuelling System Program, which adds wingtip hose-and-drogue refuelling pods to increase flexibility and efficiency.
The Stratotanker is structurally similar to the Boeing 707 commercial airliner, although not identical. It features integral wing tanks and further tanks in the lower lobe of the fuselage, totalling 22 fuel cells. These fuel cells are made of nylon fabric less than one-sixteenth of an inch thick, and a single fuel cell weighing 80 pounds can hold seven tons of fuel. The Stratotanker can offload fuel at a rate of 6,500 pounds per minute, which is enough fuel in one minute to operate an average family car for a year.
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It also supports Navy and Marine Corps aircraft
The KC-135 Stratotanker is a four-jet, swept-wing aircraft that serves as a refuelling tanker for compatible U.S. Air Force, Navy, and Marine Corps aircraft. It also provides refuelling support to compatible allied aircraft when required. KC-135 crews refuelled both USAF and Navy/Marine Corps aircraft, although they had to switch to probe and drogue adapters depending on the mission. The Navy and Marine Corps did not fit their aircraft with flying boom receptacles as the USAF boom system was not practical for aircraft carrier operations.
The KC-135 Stratotanker has been instrumental in various conflicts, including the Vietnam War and Operation Desert Storm in 1991 in the Persian Gulf. Its ability to refuel aircraft mid-air extended the duration of fighter missions from a few minutes to several hours, significantly impacting aerial warfare. The tanker's contribution to Operation Desert Storm was particularly notable, as it enabled around-the-clock missions to maintain the operability of allied warplanes.
The KC-135 Stratotanker's versatility extends beyond its primary role in aerial refuelling. It has also been utilised in research projects at the NASA Armstrong Flight Research Center at Edwards Air Force Base in California. For instance, between 1979 and 1980, an NKC-135A tanker was loaned to NASA to test special wingtip "winglets," contributing to the advancement of aeronautical technology.
The KC-135 Stratotanker has undergone various modifications to enhance its capabilities. One notable modification is the Multi-Point Refuelling Systems (MPRS), which adds refuelling pods to the aircraft's wings. These pods enable the refuelling of U.S. Navy, U.S. Marine Corps, and most NATO tactical jet aircraft while retaining the tail-mounted refuelling boom. The MPRS modification improves the flexibility and efficiency of the refuelling process, accommodating both probe-and-drogue and boom receptacle aircraft on the same mission.
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The KC-135R can offload 50% more fuel than the KC-135A
The KC-135 Stratotanker is an American military aerial refuelling aircraft that has been the core refuelling aircraft for the United States Air Force for over 60 years. The KC-135R is a modified version of the KC-135A, with several improvements, including a 50% increase in fuel offloading capacity.
The KC-135R is a re-engined and enhanced version of the KC-135, with CFM International CFM56 high-bypass turbofan engines, which offer a nearly 100% increase in thrust compared to the original J57 engine. This new engine allows the aircraft to offload 50% more fuel, a significant improvement over the KC-135A. This increased fuel offloading capacity enables the KC-135R to support aerial refuelling operations more effectively and efficiently, extending the range and endurance of US tactical fighters and bombers.
The KC-135R is also 25% more fuel-efficient and has a 25% lower operating cost than the KC-135A. This reduction in fuel consumption and operating costs allows the KC-135R to undertake longer missions and support aerial operations over a wider area. The KC-135R's operational range is 60% greater than the KC-135E for comparable fuel offloads, providing greater flexibility in basing options.
In addition to its increased fuel offloading capacity and improved fuel efficiency, the KC-135R is also significantly quieter than its predecessor. The noise levels at takeoff have been reduced from 126 to 99 decibels, resulting in a sound pressure level of about 5% of the original. This noise reduction is beneficial, especially when operating from civilian airports or in noise-sensitive areas.
The KC-135R's improvements, including its increased fuel offloading capacity, fuel efficiency, reduced operating costs, and quieter engines, have made it the mainstay of the US Air Force's tanker fleet. These enhancements have extended the Stratotanker's operational capabilities and ensured its continued role in supporting US military aerial operations for many years.
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Frequently asked questions
The KC-135 Stratotanker can carry 202,800 pounds of JP-4 jet fuel, most of which is transferable for global refueling missions.
The Stratotanker can offload fuel at a rate of 6,500 pounds (2,948 kg) per minute.
The Stratotanker uses JP-4 jet fuel.
The KC-135R Stratotanker, a re-engined and enhanced version of the KC-135, can offload 50% more fuel than its predecessor, the KC-135A.
