Katerina Swanson
The amount of fuel required to launch a space shuttle is a complex question that depends on various factors, including the type of shuttle, the number of stages, and the specific mission requirements. For example, NASA's Space Transportation System (STS) vehicle, commonly referred to as the Space Shuttle, utilized two Solid Rocket Boosters (SRB) in its initial stage, followed by an external tank supplying propellant for the three Main Engines during orbit. The external tank had three configurations with varying capacities, but the differences in their actual fuel-holding capacities were negligible. The Solid Rocket Boosters consumed a combined total of 1,000,000 kg of Ammonium Perchlorate Composite Propellant, while the external tank held 629,340 kg of liquid oxygen and 106,261 kg of liquid hydrogen. These figures provide a glimpse into the massive fuel requirements for space shuttle launches, and the specific details can vary depending on the shuttle's design and mission objectives.
| Characteristics | Values |
|---|---|
| Rocket boosters | 500,000 kg of Ammonium Perchlorate Composite Propellant (APCP) |
| Burn time | 124 seconds |
| Specific impulse (Isp) | 269 s |
| Thrust | 12.5 MN per SRB |
| External tank capacity | 629,340 kg of liquid oxygen (LOX) and 106,261 kg of liquid hydrogen (LH2) |
| Burn time | 480 seconds |
| Specific impulse | 455 seconds |
| Thrust | 5.45 MN at sea level |
| Propellant | 5000 tons to deliver 100 tons of payload to LEO and land |
Explore related products
The fuel tank
The external tank was an essential component of the Space Shuttle's design, and its performance was critical to the success of the mission. The tank was designed to provide propellant to the SSMEs during the first stage of the shuttle's ascent into orbit. The SSMEs were capable of performing above their nominal performance, often exceeding 100% throttle-up. This extra performance provided by the engines, in combination with the propellant from the external tank, was crucial in ensuring successful space shuttle launches.
The external tank itself had no engines but played a vital role in the shuttle's overall performance. Its design evolved over time, with three different configurations aimed at progressively reducing the tank's weight while maximising its propellant capacity. The final and most advanced version, the Super Lightweight Tank (SLWT), offered the optimal balance between weight reduction and propellant capacity.
Fossil Fuel Electricity Generation: How Much Power?
You may want to see also
Explore related products
Solid rocket boosters
The SRBs are jettisoned from the shuttle at an altitude of about 146,000-150,000 feet. After separation, the boosters parachute into the Atlantic Ocean, where they are recovered, examined, refurbished, and reused. Out of 270 SRBs launched over the Shuttle program, all but four were recovered.
The SRBs are ignited by firing redundant NSD pressure cartridges into redundant confined detonating fuse manifolds. The separation commands are issued from the orbiter by the SRB separation sequence, which initiates the redundant NSD pressure cartridge in each bolt and ignites the booster separation motors (BSMs). There are four BSMs on each end of each SRB, and they separate the SRBs from the external tank.
United Space Boosters Inc. (USBI) was the original SRB prime contractor for SRB assembly, checkout, and refurbishment for all non-solid-rocket-motor components and for SRB integration. At its peak, USBI had over 1500 personnel working on the Shuttle Boosters.
Mustang GT Fuel Efficiency: How Much Can It Hold?
You may want to see also
Explore related products
Liquid oxygen
The Space Shuttle External Tank (ET) is the component of the Space Shuttle launch vehicle that contains the liquid hydrogen fuel and liquid oxygen oxidizer. The ET is the largest and heaviest element of the Space Shuttle when loaded. Before liftoff, the liquid oxygen tank is filled with liquid oxygen (LOX) to approximately 97 percent, with the remaining 3 percent containing gaseous oxygen (GOX) and helium. During liftoff, LOX is drained from the bottom of the tank, and GOX is pumped into the tank's ullage volume, causing a "pressure slump", a common phenomenon in rocket propulsion. The liquid oxygen tank also includes an internal slosh baffle and a vortex baffle to dampen fluid slosh and prevent entrapment of gases in the delivered LOX.
The ET has two electrical umbilicals that provide electrical power from the orbiter to the tank and the two Solid Rocket Boosters (SRBs), and they also transmit information from the SRBs and ET to the orbiter. The ET is jettisoned just over 10 seconds after the main engine is cut off and re-enters the Earth's atmosphere. Unlike the SRBs, external tanks are not reused and break up before impacting the Indian Ocean or the Pacific Ocean, away from shipping lanes.
In 1997, NASA initiated a study of a liquid oxygen and ethanol orbital maneuvering and reaction control system for space shuttle upgrades and other reusable launch vehicle applications. The pressure-fed system uses sub-cooled liquid oxygen stored passively using insulation. Thermal stratification builds up while the space shuttle is docked at the international space station, and venting from the liquid oxygen tank is not desired during this 96-hour time period. Once the shuttle undocks, there could be a pressure collapse in the liquid oxygen tank caused by fluid mixing due to thruster firings.
Fuel Injection Service Costs in Sarasota: How Much?
You may want to see also
Explore related products
Liquid hydrogen
The Space Shuttle's external tank (ET) contained liquid hydrogen fuel and liquid oxygen oxidizer. The ET was the largest and heaviest element of the Space Shuttle when loaded. The liquid hydrogen was stored in the aft liquid hydrogen (LH2) tank, which was the largest part of the ET.
Additionally, hydrogen has caused issues during the fueling process due to its flammability. Leaks in hydrogen fuel lines have been a persistent problem, leading to launch delays or scrubbed missions. Despite these challenges, liquid hydrogen continues to be a preferred fuel for space exploration because of its high efficiency.
The aviation industry is also exploring the use of liquid hydrogen in future aircraft propulsion systems. The space industry's expertise in managing the challenges of liquid hydrogen will be valuable for the development of zero-emission aircraft.
Fuel Costs: A320 Preflight Expenses Explored
You may want to see also
Explore related products
Propellant ratio
The Space Shuttle Solid Rocket Booster (SRB) was the first solid-propellant rocket used for primary propulsion in human spaceflight. Each SRB provided a maximum of 14.7 MN (3,300,000 lbf) of thrust, or roughly 85% of the Space Shuttle's total thrust at liftoff and for the first two minutes of ascent. The SRBs helped the Space Shuttle reach an altitude of 28 miles (45 km) and a speed of 3,094 mph (4,979 km/h).
The Space Shuttle SRBs were the most powerful solid rocket motors ever used for human spaceflight until the Space Launch System (SLS) SRBs surpassed them in 2022. Each Space Shuttle SRB contained 500,000 kg (1,100,000 lb) of propellant. The propellant had an 11-pointed star-shaped perforation in the forward motor segment, which provided high thrust at ignition, and a double-truncated-cone perforation in the aft segments, which reduced thrust by approximately one-third 50 seconds after liftoff to prevent overstressing the vehicle during maximum dynamic pressure.
Liquid oxygen and liquid hydrogen are used as propellants in the high-efficiency main engines of the Space Shuttle. Liquid hydrogen delivers a specific impulse about 30%-40% higher than most other rocket fuels, but it has a very low density (0.071 g/ml) and requires a much larger storage volume than other fuels.
Other propellants used in spacecraft include hypergolic fuels like hydrazine, monomethyl hydrazine (MMH), and unsymmetrical dimethyl hydrazine (UDMH), which are highly toxic but have good performance and freezing point characteristics.
Fuel Contracts: How Much Can You Save?
You may want to see also
Frequently asked questions
The amount of fuel required depends on the specific space shuttle and its configuration. For example, the NASA Space Transportation System (STS) vehicle, or Space Shuttle, used two solid rocket boosters that burned through about 500,000 kg of fuel in 124 seconds.
A space shuttle's fuel system typically consists of two stages: an external tank providing propellant for the main engines, and an orbital maneuvering system with hypergolic liquid-propellant rocket engines.
Different fuels and propellants offer varying burn times, impulses, and thrust. For instance, the solid rocket boosters of the STS provided 124 seconds of burn time with an impulse of 269 seconds, resulting in 12.5 MN of thrust.
Several factors influence the amount of fuel required, including the weight of the payload, the launch site's altitude and geography, and the specific design of the rocket and its engines.
Yes, weight-saving measures have been implemented in space shuttle design. For example, NASA's STS initially had a white fuel tank, but they stopped painting it to reduce weight.
