voyager je sel mimo neptuna.
na zacetku sm iz ESA-ine strani pastal RAZLOG. ti mi blodis neki drugega, pa se reces da nism omenil iztrelisca. glede teze goriva, da ostane ista, si mel prav, sm jaz neki zamesal.
no, naredim ti izracun, k vidim da ocitno ne razumes, da to ne more bit primarni razlog.
Ariane 5’s cryogenic H158 main stage (H173 for Ariane 5 ECA) is called the EPC (Étage Principal Cryotechnique/Cryogenic First Stage). It consists of a large tank 30.5 metres high with two compartments, one for 130 tonnes of liquid oxygen and one for 25 tonnes of liquid hydrogen, and a Vulcain engine at the base with thrust of 115 tonnes-force (1.13 meganewtons). This part of the first stage weighs about 15 tonnes when empty.
Attached to the sides are two solid propellant boosters, P238 (P241 for Ariane 5 ECA), each weighing about 277 tonnes full. Each delivers a thrust of about 630 tonnes-force (6.2 MN). These boosters can be recovered with parachutes, like the Space Shuttle Solid Rocket Boosters. They may have been retrieved for examination on early missions, but are not reused.
The original version is dubbed Ariane 5G (Generic) with a launch mass of 737 tonnes. Its payload capability to Geostationary transfer orbit (GTO) was initially specified as 5970 kg, but was increased after the qualification flights to 6200kg.
torej skupna teza je 130 + 25 + 15 + 277 * 2 = 724 ton, oz. tam pise 737 ton (bomo to uporablal)
potisk majo 1,13 + 6,2*2 = 13,53 MN
prinese pa lahko usable 6.2 ton. torej za vsako tono rabis 118,87 ton goriva.
torej za premagat zemeljsko teznost (da dosezemo izenacenje sil) rabimo na ekvatorju: 7.207,86 kN (7.21 MN), na polih 7.244,71 kN (7.24 MN). razlika je torej 0.03 MN.
Namesto 5970 lahko ponesemo 6268,5 kg, ocitno so tudi oni to ugotovili, oz. 298,5 kg vec.
in ja rusi imajo iztrelisce v sibiriji na 50° lat in tudi na 60°, ce nisi vedu.
vir:
http://vesolje.net/navtika/izstrelisca/index.htm
vecina jih ni na ekvatorju, kakor bi pricakoval. sicer pa isto bi lah dosegu, tud ce bi visje delal, bi lah na gorah delal... ce bi hotl manjso gravitacijo.
Plesetsk is not ideally suited for low inclination or geostationary launches because of its high latitude (as compared to the Kennedy Space Center, at around 28° north or Centre Spatial Guyanais at Kourou, the ESA facility, which is at 5° north).
zopet, iz tega lahko sklepamo, da je razlog zakaj ekvator ne gravitacija.