Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by unspecified on Thursday November 30, 2017 @06:19PM
(#15820566)
There's still hope that they will make their first static test fire in December, though! This will be their first time lighting all 27 engines, so it could be very exciting.
A FH static fire can only be done on the pad: there is no test stand big enough to do it.
Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by SOLAR_FIELDS on Thursday November 30, 2017 @07:23PM
(#15820942)
My theory is that the public date announcements are actually a bit of a perverse incentive to motivate his employees to work longer hours to meet the arbitrary date specified.
Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by gozur88 on Thursday November 30, 2017 @09:22PM
(#15821448)
I'm not sure it's that he's stretched thin or just that he never pads his estimates. When Elon Musk says he's going to deliver X in three months, the unspoken coda is always "assuming every bit of uncertainty falls my way". And of course, it never does in a nontrivial project. For anyone.
Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by valuearb on Friday December 01, 2017 @09:00PM
(#15829623)
Falcon Heavy launch was always linked to the pad preparation as a gating factor. They tried hard to get it cleaned up after the explosion but didn't quite make it.
Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by nkoren on Thursday November 30, 2017 @06:12PM
(#15820525)
Raptor won't fly on the Falcon, so it depends on the arrival of the BFR. Elon wants that to be doing Mars missions in the 2022 window, so test flights would have to precede that by some time. Construction of the first BFR is due to start around Q2 next year; when it gets in the air is anybody's guess.
Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by nkoren on Thursday November 30, 2017 @06:34PM
(#15820653)
A higher-impulse second stage on the Heavy would make sense in payload terms, but have you seen anything from SpaceX indicating that they actually are thinking about doing this? My understanding of their design philosophy is that they prioritise the operational efficiencies of only having one type of engine and one type of propellant to worry about on the pad.
Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by greglindahl on Thursday November 30, 2017 @06:57PM
(#15820784)
SpaceX's initial money from the Air Force for Raptor involved the possibility of a new Raptor-powered FH upper stage. There's no sign that such a stage is still planned (or was ever seriously considered, really.)
Re:Debut of SpaceX’s Falcon Heavy rocket now planned early n...
by nkoren on Friday December 01, 2017 @07:45AM
(#15823462)
Huh, I'd forgotten about that -- thanks.
Yeah, I doubt it was seriously considered. Probably just didn't want to tell the Air Force what they were really planning to use the Raptor for. Can't say I blame them!
A FH static fire can only be done on the pad: there is no test stand big enough to do it.
* staggered start, the engines are started in pairs on the order of 100s milliseconds apart, so 13 chances for an unbalanced engine start
* vastly increased acoustic and vibration shock, I really wish I could hear the noise in person (from a long way away)
And the Engadget article just references an aviation week article (paywalled) http://aviationweek.com/space/falcon-heavy-debut-slips-2018
There's a lot more (non paywalled) information here: https://spaceflightnow.com/2017/11/28/debut-of-spacexs-falco...
This made me laugh. I think it belongs on shitelonsays.com.
http://mashable.com/2017/11/22/tesla-battery-powerpack-austr...
Yeah, I doubt it was seriously considered. Probably just didn't want to tell the Air Force what they were really planning to use the Raptor for. Can't say I blame them!