Gravity turn: Perbedaan antara revisi

'''Gravity turn''' atau '''zero-lift turn''' merupakan manuver yang digunakan dalam meluncurkan [[wahana antariksa]] ke dalam, atau turun dari, orbit sekitar benda angkasa seperti planet atau bulan.<ref name="space-sourcebook">{{Cite book|last = Glasstone|first = Samuel|title = Sourcebook on the Space Sciences|publisher = D. Van Nostrand Company, Inc|year = 1965|pages = 209 or §4.97|url = http://books.google.com/?id=K6k0AAAAMAAJ&q=gravity+turn&dq=gravity+turn|access-date = 2016-01-21|archive-date = 2023-08-08|archive-url = https://web.archive.org/web/20230808231951/https://books.google.com/books?id=K6k0AAAAMAAJ&q=gravity+turn&dq=gravity+turn&hl=en|dead-url = no}}</ref><ref name="thesis">{{Cite journal|first = David W.|last = Callaway|title = Coplanar Air Launch with Gravity-Turn Launch Trajectories|journal = Masters Thesis|date = March 2004|url = https://research.maxwell.af.mil/papers/ay2004/afit/AFIT-GAE-ENY-04-M04.pdf|access-date = 2016-01-21|archive-date = 2007-11-28|archive-url = https://web.archive.org/web/20071128105951/https://research.maxwell.af.mil/papers/ay2004/afit/AFIT-GAE-ENY-04-M04.pdf|dead-url = yes}}</ref>

Istilah gravity turn juga dapat mengacu pada penggunaan gravitasi planet untuk mengubah arah wahana antariksa dalam situasi selain memasuki atau meninggalkan orbit. Ketika digunakan dalam konteks ini, hal ini mirip dengan katapel gravitasi.; perbedaannya adalah bahwa katapel gravitasi sering meningkat atau menurun kecepatan wahana antariksa dan berubah arah, sedangkan gravitasi berubah hanya mengubah arah.<ref name="mars-nonstop">{{Cite journal|title = Mars Nonstop Round-Trip Trajectories|last = Luidens|first = Roger W.|year = 1964|journal = American Institute of Aeronautics and Astronautics|volume = 2|issue = 2|pages = 368–370|url = http://ntrs.nasa.gov/search.jsp?R=431657&id=1&qs=Ntt%3D%2522Mars%252BNonstop%252BRound-Trip%252BTrajectories%2522%26Ntk%3Dall%26Ntx%3Dmode%2520matchall%26N%3D0%26Ns%3DHarvestDate%257c1|access-date = 2016-01-21|archive-date = 2022-12-06|archive-url = https://web.archive.org/web/20221206195634/https://ntrs.nasa.gov/search.jsp?R=431657&id=1&qs=Ntt%3D%2522Mars%252BNonstop%252BRound-Trip%252BTrajectories%2522%26Ntk%3Dall%26Ntx%3Dmode%2520matchall%26N%3D0%26Ns%3DHarvestDate%257c1|dead-url = no}}</ref> <span class="cx-segment" data-segmentid="18"></span>