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In astrodynamics and rocketry, gravity loss is a measure of the loss in the net performance of a rocket while it is thrusting in a gravitational field. In other words, it is the cost of having to hold the rocket up in a gravity field.
Gravity losses depend on the time over which thrust is applied as well the direction the thrust is applied in. Gravity losses as a proportion of delta-v are minimised if maximum thrust is applied for a short time, and by avoiding thrusting directly away from the local gravitational field. During the launch and ascent phase, however, thrust must be applied over a long period with a major component of thrust in the opposite direction to gravity, so gravity losses become significant. For example, to reach a speed of 7.8 km/s in low Earth orbit requires a delta-v of between 9 and 10 km/s. The additional 1.5 to 2 km/s delta-v is due to gravity losses, steering losses and atmospheric drag.[citation needed]
In astrodynamics and rocketry, gravityloss is a measure of the loss in the net performance of a rocket while it is thrusting in a gravitational field...
physics, gravity (from Latin gravitas 'weight') is a fundamental interaction which causes mutual attraction between all things that have mass. Gravity is,...
mechanical stress. Prandtl–Glauert singularity Ideal gas law Gravity turn Gravityloss Equivalent airspeed – max q for a spacecraft corresponds to maximum...
A gravity assist, gravity assist maneuver, swing-by, or generally a gravitational slingshot in orbital mechanics, is a type of spaceflight flyby which...
The gravity of Earth, denoted by g, is the net acceleration that is imparted to objects due to the combined effect of gravitation (from mass distribution...
zero g-force, or zero-g (named after the g-force) or, incorrectly, zero gravity. Microgravity environment is more or less synonymous in its effects, with...
excreted with minimal loss of water and nutrients. The concentration of the excreted molecules determines the urine's specific gravity. In adult humans, normal...
observables far from the black hole. This implies a loss of exact locality in quantum gravity. Although this loss of locality is very small, it persists over...
floating body. It is calculated as the distance between the centre of gravity of a ship and its metacentre. A larger metacentric height implies greater...
gravitational field which it produces. In the relativistic sense, the "speed of gravity" refers to the speed of a gravitational wave, which, as predicted by general...
The surface gravity, g, of an astronomical object is the gravitational acceleration experienced at its surface at the equator, including the effects of...
rather than thrust to overcome gravity, which greatly reduces gravitylosses. On the other hand, the reduced gravitylosses come at the price of much higher...
{\displaystyle H_{Lf}} = Frictional head loss v {\displaystyle v} = Downstream velocity g {\displaystyle g} = Gravity of Earth R h {\displaystyle R_{h}} =...
also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in...
gauge theory of gravity he had developed in 2001 to explain Podkletnov's observations. Wu's theory approximated the relative gravityloss as 0.03% (an order...
There have been many different attempts at constructing an ideal theory of gravity. These attempts can be split into four broad categories based on their...
gravity acts directly against the thrust of the rocket, lowering its vertical acceleration. Losses associated with this slowing are known as gravity drag...
and the former chief executive officer of credit card processing company Gravity Payments. He is the sole shareholder and board member of the company. He...
carries the gravitational force. Thus, string theory is a theory of quantum gravity. String theory is a broad and varied subject that attempts to address a...
are: the carbonate catastrophe, loss of the planet's magnetic field and Mars' low gravity. Mars' low gravity and loss of a magnetic field allowed the...
\Delta v\ } is delta-v of the vehicle (change of velocity plus losses due to gravity and atmospheric drag); m 0 {\displaystyle m_{0}} is the initial...
resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released...
Gravitational waves are waves of the intensity of gravity that are generated by the accelerated masses of binary stars and other motions of gravitating...
Bimetric gravity or bigravity refers to two different classes of theories. The first class of theories relies on modified mathematical theories of gravity (or...
solid gravity dam and Braddock Locks & Dam is a hollow gravity dam.[citation needed] A gravity dam can be combined with an arch dam into an arch-gravity dam...
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