Mercedes Mullins
The Lockheed C-5 Galaxy is a large, high-wing cargo aircraft with a cargo hold that is 121 feet long, which is one foot longer than the length of the Wright brothers' first flight. The C-5 Galaxy has been nicknamed FRED by its aircrews, which stands for Fucking Ridiculous Economic/Environmental Disaster due to its high fuel consumption. The C-5 is equipped with four TF39 turbofan engines, which were selected for their increased engine thrust and lower fuel consumption compared to other engines at the time. Despite this, the C-5 Galaxy is still considered to have low fuel efficiency, which was a concern for carriers who expressed interest in a civilian version of the aircraft.
| Characteristics | Values |
|---|---|
| Fuel consumption | Voracious |
| Engine | TF39 |
| Bypass ratio | Eight-to-one |
| Cargo hold length | 121 feet |
| First rolled out | 2 March 1968 |
| Nickname | FRED (Fucking Ridiculous Economic/Environmental Disaster) |
| Takeoff and landing distance requirements at maximum-load gross weight | 8,300 ft and 4,900 ft respectively |
| Number of wheels | 28 |
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What You'll Learn
- The C-5 Galaxy has a fuel consumption of 18.6 gallons per mile
- The plane's aircrews nicknamed it FRED for Fucking Ridiculous Economic/Environmental Disaster due to its fuel consumption
- The C-5 has 12 internal wing tanks and is equipped for aerial refuelling
- The C-5's engine has a bypass ratio of eight-to-one, which helps reduce fuel consumption
- Lockheed planned a civilian version of the C-5, the L-500, but it was not ordered due to low fuel efficiency
The C-5 Galaxy has a fuel consumption of 18.6 gallons per mile
The C-5 Galaxy is a large, high-wing cargo aircraft with a cargo hold that is 121 feet long. This is one foot longer than the length of the Wright brothers' first flight. The C-5 Galaxy has a fuel consumption rate of 18.6 gallons per mile.
The aircraft's aircrews have nicknamed it "FRED", which stands for "Fucking Ridiculous Economic/Environmental Disaster", due to its high fuel consumption and maintenance and reliability issues.
Despite its fuel consumption, the C-5 Galaxy has some impressive features. It has a high T-tail fin stabilizer and four TF39 turbofan engines mounted on pylons beneath its wings, which are swept 25 degrees. The C-5 also has 12 internal wing tanks and is equipped for aerial refueling.
Lockheed, the company that designed the C-5 Galaxy, also planned a civilian version called the L-500. Both passenger and cargo versions of the L-500 were designed, with the passenger version capable of carrying up to 1,000 people. However, no orders were placed due to concerns over operational costs caused by low fuel efficiency and competition from Boeing's 747.
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The plane's aircrews nicknamed it FRED for Fucking Ridiculous Economic/Environmental Disaster due to its fuel consumption
The Lockheed C-5 Galaxy is a large, high-wing cargo aircraft with a cargo hold that is 121 feet long, which is one foot longer than the length of the Wright brothers' first flight. The plane has been nicknamed "FRED", short for "Fucking Ridiculous Economic/Environmental Disaster" by its aircrews due to its high fuel consumption. The C-5 Galaxy consumes 18.6 gallons of fuel per mile, which is a significant amount compared to other aircraft. This high fuel consumption is likely due in part to the size and weight of the aircraft, as it has a maximum takeoff weight of over 649,000 pounds, including payload, fuel, and other equipment.
The C-5 Galaxy is powered by four TF39 turbofan engines, which were selected for their increased engine thrust and lower fuel consumption compared to other engines at the time. Despite this, the aircraft still consumes a large amount of fuel, which has been a concern for both military and civilian operators. Lockheed, the manufacturer of the C-5 Galaxy, has also expressed interest in developing a civilian version of the aircraft, known as the L-500, which would have been able to carry up to 1,000 passengers or a typical C-5 cargo volume. However, no orders were placed due to the high operational costs caused by the low fuel efficiency of the aircraft, among other factors.
The high fuel consumption of the C-5 Galaxy has also been a concern for the military, as it contributes to the already high fuel usage of the U.S. armed forces. According to reports, the U.S. military burns up 340,000 barrels of oil per day, which is equivalent to the fuel consumption of an entire third-world country. The C-5 Galaxy, with its large fuel capacity of 356,000 pounds of JP-4 fuel, contributes significantly to this total. While the exact fuel burn rate per hour is not publicly available, it is clear that the C-5 Galaxy's fuel consumption is a notable factor in its operation and maintenance.
To address the issue of high fuel consumption, Lockheed has invested in research and development to improve the fuel efficiency of the C-5 Galaxy. In 2014, the company investigated drag reduction techniques by plasma-heating turbulent transonic airflow, which helped save overall weight and reduce fuel consumption. Additionally, the Air Force Research Laboratory explored the use of shape-memory alloys for speed-dependent vortex generators, which could further enhance fuel efficiency. These efforts demonstrate the ongoing commitment to improving the environmental and economic sustainability of the C-5 Galaxy, despite its initial nickname of "FRED" by its aircrews.
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The C-5 has 12 internal wing tanks and is equipped for aerial refuelling
The Lockheed C-5 Galaxy is a large, high-wing cargo aircraft with a distinctive high T-tail fin (vertical) stabilizer. It is powered by four TF39 turbofan engines, which are mounted on pylons beneath its wings. The C-5 has a voracious appetite for fuel, earning it the nickname "FRED" (short for "Fucking Ridiculous Economic/Environmental Disaster") among its aircrews. Despite its fuel consumption, the C-5 is equipped for aerial refuelling, allowing it to stay airborne for extended periods.
The C-5's 12 internal wing tanks contribute to its impressive fuel capacity, which is necessary given the aircraft's size and power. Each of its TF39 engines promises and achieves a bypass ratio of eight-to-one, a significant improvement over previous engines, which had a bypass ratio of less than two-to-one. This higher bypass ratio results in increased engine thrust and lower fuel consumption, which is critical for an aircraft of this size.
The C-5's fuel efficiency has been a concern, with Lockheed investigating drag reduction techniques through plasma-heating of turbulent transonic airflow. This technology helps save overall weight by reducing fuel consumption. Additionally, the Air Force Research Laboratory has explored the use of shape-memory alloys for speed-dependent vortex generators, which could further enhance the aircraft's fuel efficiency.
The C-5's fuel consumption is a trade-off for its impressive capabilities. On September 13, 2009, a C-5M broke 41 new records, including payload and climb records. It carried a payload of 176,610 lb (80,110 kg) to an altitude of 41,100 ft (12,500 m) in just 23 minutes and 59 seconds. The C-5's ability to handle such payloads and climb rates comes at the cost of higher fuel usage, which is a challenge that Lockheed and the Air Force continue to address through technological advancements.
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The C-5's engine has a bypass ratio of eight-to-one, which helps reduce fuel consumption
The C-5 Galaxy is a large, high-wing cargo aircraft with a distinctive high T-tail fin (vertical) stabilizer. It has earned the nickname "FRED" from its aircrews, which stands for "Fucking Ridiculous Economic/Environmental Disaster" due to its high fuel consumption.
The C-5's engine has a bypass ratio of eight-to-one, which was revolutionary at the time of its development and helped reduce fuel consumption. Before the C-5, all engines had a bypass ratio of less than two-to-one. The increased bypass ratio in the C-5's engine provided benefits such as improved engine thrust and lower fuel consumption.
The C-5 is equipped with four TF39 turbofan engines, which are mounted on pylons beneath its wings. The wings are swept at a 25-degree angle. The aircraft also has 12 internal wing fuel tanks and is capable of aerial refueling.
Despite the efforts to improve fuel efficiency, the C-5 Galaxy still consumes a significant amount of fuel. According to one source, the C-5 burns approximately 18.6 gallons per mile. This high fuel consumption is a contributing factor to the aircraft's nickname, "FRED".
Lockheed, the company that designed the C-5 Galaxy, also planned a civilian version of the aircraft called the L-500. Both passenger and cargo versions were designed, with the passenger version capable of carrying up to 1,000 people. However, no orders were placed for either version due to concerns about low fuel efficiency and operational costs.
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Lockheed planned a civilian version of the C-5, the L-500, but it was not ordered due to low fuel efficiency
The Lockheed C-5 Galaxy is a large, high-wing cargo aircraft with four TF39 turbofan engines mounted on pylons beneath its wings. It has a distinctive high T-tail fin (vertical) stabilizer. The C-5 is known for its large cargo hold, which is 121 feet long—longer than the Wright brothers' first flight.
Lockheed planned a civilian version of the C-5, the L-500, with both passenger and cargo versions designed. The L-500 was expected to be a game-changer in civilian transportation, with the all-passenger version capable of carrying up to 1,000 people and the cargo version offering a competitive payload capacity. Lockheed initially intended to produce and sell the L-500 as an all-cargo plane, with the potential for significant cost savings for airlines.
However, despite the initial interest from carriers, no orders were placed for the L-500 due to operational costs caused by low fuel efficiency. This was a significant concern for profit-making carriers, even before the oil crisis of the 1970s. The L-500 also faced keen competition from Boeing's 747, and Lockheed's high development costs for the C-5 and subsequent L-1011 led to the company requiring a governmental rescue.
The C-5's low fuel efficiency has been a notable issue, with aircrews nicknaming the aircraft "FRED," which stands for "Fucking Ridiculous Economic/Environmental Disaster." Lockheed has since investigated drag reduction and other measures to improve fuel efficiency, but the civilian L-500 version did not progress beyond the planning stage.
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