Ameer Randolph
The Tupolev Tu-144 was a supersonic aircraft designed by the Tupolev Design Bureau and manufactured by the Voronezh Aircraft Production Association. It was the first commercial transport to exceed Mach 2, reaching speeds of up to 2,200 kilometres per hour. However, the Tu-144 faced various reliability and developmental issues, including high fuel consumption, which contributed to its limited viability for regular use. With that, let's delve into the question: How much fuel does the Tu-144 burn per hour?
| Characteristics | Values |
|---|---|
| Cruising fuel consumption | 36,200 kg/h |
| Average minimum fuel consumption | 38,000 kg/h |
| Cruising fuel consumption (Tu-144D) | 25,000 kg/h |
| Cruising speed | 2,200 km/h (1,400 mph) |
| Maximum speed | Mach 2.2 |
| Service altitude | 16,000 m (52,000 ft) |
| Number of engines | 4 |
| Engine type | Kuznetsov NK-144 turbofan |
| Engine thrust | 18,000 kg |
| Engine SFC | 1.58 kg/kgp hr |
| Alternative engine | Kolesov RD-36-51A |
| Alternative engine thrust | 20,000 kg |
| Alternative engine SFC | 1.23 kg/kgp hr |
| Number of aircraft manufactured | 16 |
| Number of commercial flights | 102 |
| Number of commercial flights with passengers | 55 |
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What You'll Learn
The Tu-144C burns 36,200 kg of fuel per hour
The Tupolev Tu-144 was a supersonic aircraft designed for a 30,000-hour service life over 15 years, with a cruising speed of around 2,200 kilometres per hour (1,400 mph) (Mach 2). It first went supersonic on June 5, 1969, and became the world's first commercial transport to exceed Mach 2 on May 26, 1970. However, reliability and developmental issues, such as the 1973 Paris Air Show crash, high operating costs, and rising fuel prices, limited its regular use.
The Tu-144C variant of the aircraft burned 36,200 kg of fuel per hour during cruise, with an average minimum of 38,000 kg/h. This fuel consumption was significantly higher than that of comparable aircraft like the Concorde, which burned around 20 tons of fuel per hour, and the A330, which burns less than 6 tons per hour.
The high fuel consumption of the Tu-144C was due in part to the choice of engines. The NK-144 engine, a Kuznetsov turbofan with afterburning, was selected despite its high fuel consumption of 1.58 kg/kgp hr. This decision was made due to the engine's availability, thrust, and suitability for testing and perfecting the aircraft.
The Tu-144C's fuel consumption had significant implications. With a 3,300 km route from Moscow to Almaty, the aircraft consumed 76.5 tons of fuel for a 2-hour flight. This resulted in a fuel burn per mile that was 150% higher than that of the Concorde and significantly higher than that of more modern aircraft like the A330.
The Tu-144's fuel efficiency, or lack thereof, contributed to its eventual cancellation. The expansion of Soviet air travel in the late 1970s made the supply of aviation fuel a constraint, and potential Western buyers were dissuaded by high fuel prices. Additionally, the development of more fuel-efficient aircraft, such as the Airbus A330 and Boeing 777, further highlighted the Tu-144's inefficiency.
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The Tu-144D burns 25,600 kg of fuel per hour
The Tupolev Tu-144 was a supersonic aircraft designed for a 30,000-hour service life over 15 years. It was manufactured by the Voronezh Aircraft Production Association, with the aircraft's design headed by aeronautics pioneer Aleksey Tupolev. The Tu-144 conducted 102 commercial flights, of which only 55 carried passengers, and cruised at a speed of around 2,200 kilometres per hour (1,400 mph) (Mach 2).
The Tu-144 project aimed to create a supersonic aircraft with a Specific Fuel Consumption (SFC) of not more than 1.2 kg/kg thrust hour. The development of suitable engines for the Tu-144 was a significant factor in the project's progress. The choice of engine was critical to achieving small fuel consumption at cruising speed and ensuring the required flight range.
The Tu-144D variant of the aircraft was designed to address fuel efficiency. It was equipped with the Kolesov RD-36-51 turbojet engine, which did not have an afterburner, resulting in a more economical fuel burn rate. The cruising fuel flow of the Tu-144D is approximately 25,600 kg per hour, a significant improvement over the Tu-144C variant, which burned 36,200 kg of fuel per hour.
The high fuel consumption of the Tu-144, especially the Tu-144C variant, contributed to its reputation as one of the most uneconomical passenger aircraft. The average minimum fuel burn rate for the Tu-144C was 38,000 kg per hour, corresponding to 29 litres per 100 km per passenger. By comparison, the Concorde, which had a similar appearance to the Tu-144, burned around 20 tons of fuel per hour in cruise.
The Tu-144D's improved fuel efficiency was a step forward, but other factors, such as rising fuel prices, environmental concerns, and the expansion of Soviet air travel, also played a role in the aircraft's viability and customer interest.
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The Tu-144 is less fuel-efficient than the Concorde
The Tupolev Tu-144 was a supersonic aircraft that conducted 102 commercial flights, of which only 55 carried passengers. It was bigger and faster than the Concorde, with a maximum speed of Mach 2.2 compared to Concorde's Mach 2.04. However, the Tu-144 was less fuel-efficient than the Concorde.
The Tu-144 had a cruising fuel consumption of 36,200 kg/h, while the Concorde burned around 20,000 kg/h in cruise. This means that the Tu-144 burned significantly more fuel per hour than the Concorde. The Tu-144's fuel consumption was made worse by the fact that it could only sustain supersonic speeds using afterburners continuously, while the Concorde was capable of supercruise and did not need to use reheat at cruising speed.
The Tu-144's high fuel consumption was due in part to its engines. The only engine available for the Tu-144 with the required thrust and suitable for testing and perfecting the aircraft was the afterburning Kuznetsov NK-144 turbofan, which had a cruise specific fuel consumption (SFC) of 1.58 kg/kgp hr. This was higher than the SFC of 1.2 kg/kgp hr that had been targeted during the design phase.
In comparison, the Concorde's Rolls-Royce/Snecma Olympus 593 engines were among the most efficient ever made. They had a specific fuel consumption of 1.327 kg/kg thrust hour at afterburning, which was lower than that of the NK-144 engine used in the Tu-144.
The Tu-144's low fuel efficiency, combined with its unreliability, high noise levels, and high operating costs, contributed to its eventual cancellation by the Soviet government in 1983.
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The Tu-144 was designed for a 30,000-hour service life
The Tupolev Tu-144 was a supersonic passenger aircraft designed by the Tupolev Design Bureau and manufactured by the Voronezh Aircraft Production Association in Voronezh. It was designed for a 30,000-hour service life over 15 years, with a maximum speed of Mach 2.2. The aircraft had a troubled history, with high-profile crashes, reliability and developmental issues, and high operating costs.
The Tu-144 conducted only 102 commercial flights, of which only 55 carried passengers. It cruised at a speed of around 2,200 kilometres per hour (1,400 mph) and had an average service altitude of 16,000 metres (52,000 ft). The Tu-144 first went supersonic on June 5, 1969, becoming the world's first commercial transport to exceed Mach 2 on May 26, 1970.
The Tu-144's fuel consumption was a significant issue. It was known to be a "fuel hog," with a cruising fuel consumption of 36,200 kg/h for the Tu-144C variant and 25,600 kg/h for the Tu-144D variant. This high fuel consumption, along with rising fuel prices, was a contributing factor in the decline of the Tu-144 project.
To improve fuel efficiency, the Tu-144DA variant was introduced, which increased the wing area and take-off weight, and replaced the engines with RD-36-61 engines, providing 5% more thrust. This variant increased the fuel capacity from 98,000 kg to 125,000 kg and extended the range to up to 7,500 km.
Despite these improvements, the Tu-144 project was ultimately cancelled due to various factors, including engine issues, high operating costs, and the challenges of the 1973 oil crisis, which made aviation fuel a growth constraint for the Soviet aviation industry.
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The Tu-144's fuel consumption is 1.58 kg/kgp hr
The Tupolev Tu-144 was a supersonic aircraft designed for a 30,000-hour service life over 15 years. It was produced by the Voronezh Aircraft Production Association, with 16 aircraft manufactured. The Tu-144 conducted 102 commercial flights, of which only 55 carried passengers. It cruised at a speed of around 2,200 kilometres per hour (1,400 mph) (Mach 2).
The Tu-144's fuel consumption is a notable aspect of its design. The cruise-specific fuel consumption (SFC) of the Tu-144's Kuznetsov NK-144 turbofan engine is 1.58 kg/kgp hr. This is higher than the targeted SFC of 1.2 kg/kgp hr for the Myasishchev SST, which was a design requirement for a supersonic flight range.
The Tu-144's fuel consumption had significant implications for its operational efficiency and viability. With a cruising fuel consumption of 36,200 kg/h, it was considered the most uneconomical passenger aircraft ever. This high fuel burn contributed to the Tu-144's overall operating costs, which, along with reliability issues, the 1973 Paris Air Show crash, and rising fuel prices, led to a decline in foreign customer interest.
The Tu-144's fuel consumption can be compared to other aircraft. For example, the Concorde burned around 20 tons of fuel per hour in cruise, while the A330 burns less than 6 tons per hour. The Rafale jet, a French-built aircraft used by the Indian Air Force, consumes approximately 2,500 litres of fuel per hour in level cruising flight, but this can surge to about 9,000 litres per hour during combat manoeuvres or afterburner activation.
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Frequently asked questions
The Tu-144 aircraft had a cruising fuel consumption of 36,200 kg/h, with a minimum average of 38,000 kg/h. This equates to 29 liters/100 km per passenger.
The Tu-144 was much less fuel-efficient than other aircraft. For example, Concorde burned around 20 tons of fuel per hour, while the A330 burns less than 6 tons per hour.
The Tu-144's fuel consumption was influenced by its speed, weight, and altitude. It cruised at a speed of around 2,200 kilometres per hour (1,400 mph) (Mach 2) and had a service altitude of 16,000 meters (52,000 feet).
