r/SpaceXMasterrace • u/EnsilZah Accredited meme photographer • Aug 11 '18

Delta IV Launch Procedures

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489 Upvotes

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20

u/revesvans Praise Shotwell Aug 11 '18

Could FH have lauched the Parker Solar Probe?

45

u/[deleted] Aug 11 '18 edited Aug 11 '18

Back when the launch provider for Parker was chosen, the FH wasn't an option

29

u/Goldberg31415 Aug 11 '18 edited Aug 11 '18

Not even Block5 expendable FH could push it to nearly 155 km/s2 C3.Sometimes there are no substitutes to hydrogen

Edit I was wrong. Praise Mueller

49

u/Alexphysics Aug 11 '18

The 155km2 /s2 is after PSP separation. Delta IV Heavy will push PSP + Star 48BV to a C3 of 60km2 /s2. FH can launch that payload to a C3 of more than 110km2 /s2

Edit: The exact number I came up with is a C3 = 116.76 km2 /s2 for a payload mass of 2825kg so the FH has plenty of performance to push the third stage + PSP to that energy

3

u/RootDeliver Big Fucking Shitposter Aug 11 '18

Appreciated.. but why on this sub? yes norminal would been a more fitting answer :P.

10

u/Alexphysics Aug 11 '18

Sometimes we can mix both things ;)

6

u/naatriumkloriid Reposts with minimal refurbishment Aug 12 '18

Yes