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Gravity turn

A gravity turn or zero-lift turn is a maneuver used in launching a spacecraft into, or descending from, an orbit around a celestial body such as a planet or a moon. It is a trajectory optimization that uses gravity solely through the vehicle's own thrust. First, the thrust is not used to change the spacecraft's direction, so more of it is used to…

Applications, Guidance and control & Descent and landing procedure

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Overview

Launch procedure

Descent and landing procedure

Guidance and control

Limitations

Use in orbital redirection

Use in spaceflight

Mathematical description

Advanced semantic analysis

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Map overview Semantic statistics

Gravity turn

Nodes55
Edges54
Triples106
Avg. degree1.96
Density0.036364
Components1

How this topic connects Entity context

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Gravity turn

Top relations

related to Limitations · 21
Gravity turn → Although, Another, As, Atmosphere, By, Dynamic, Firstly, Higher, However, If, In, Just, Maximum, MECO, Moon, Near, On, Several, The, This
related to Launch · 13
Gravity turn → Although, Apollo, Apollo-Saturn, Because, Black Arrow, Control, Excessive, In, Steering, The, The British, Then, To
related to Use in spaceflight · 13
Gravity turn → Although, Apollo, Apollo Program, At, Because, Earth, Launches, Many, Moon, Saturn, Surveyor, Surveyor Program's, What
related to Descent and landing procedure · 8
Gravity turn → Because, Lander, Lunar Surveyor, Moon, Surveyor, The, The Apollo Lunar Module, This
related to Downrange acceleration · 8
Gravity turn → After, Because, Earth, If, Some, The, Then, This
related to Landing · 8
Gravity turn → After, Apollo, Because, It, The, Therefore, This, To
related to Vertical climb · 8
Gravity turn → After, During, First, For, Losses, Space Shuttle, The, This
related to Deorbit and entry · 6
Gravity turn → After, For, If, In, Mars, The
related to Mathematical description · 6
Gravity turn → By, F/mg, However, The, This, Under
related to Use in orbital redirection · 4
Gravity turn → Although, Even, For, In

Important terminology Word statistics

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Important terminology

gravity vehicle turn thrust launch rocket atmosphere landing used orbit vertical maneuver velocity guidance engine flight angle direction surface trajectory

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Gravity turnis agood alternative0.90text
a planet or a mooninstance ofan orbit around a celestial body0.80text
the Mooninstance ofDescent and landing procedureBecause heat shields and parachutes cannot be used to land on an airless body0.80text
a powered descent with a gravity turn is a good alternativeinstance ofDescent and landing procedureBecause heat shields and parachutes cannot be used to land on an airless body0.80text
Mars the deorbit burn will only lower periapsis into the upper layers of the atmosphereinstance ofIf the craft is landing on a planet with an atmosphere0.80text
rather than just above the surface as on an airless bodyinstance ofIf the craft is landing on a planet with an atmosphere0.80text
a gimballing main engineinstance ofa system0.80text
a reaction control systeminstance ofa system0.80text
or possibly a control moment gyroscope must be used for attitude controlinstance ofa system0.80text
the Moon this presents no probleminstance ofOn an airless body0.80text
however on a planet with a dense atmosphere this is not possibleinstance ofOn an airless body0.80text
Gravity turnrelated to Deorbit and entryThe0.60section

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