SpaceX

Matt Teare
@mattyteare
7 ч
@elonmusk current or future versions for F9?

Elon Musk
@elonmusk
7 ч
@mattyteare Basically current, but higher throttle setting. Good performance of recent launches allows us to reduce 3 sigma reserve margin.

Elon Musk
@elonmusk
@elonmusk Max performance numbers are for expendable launches. Subtract 30% to 40% for reusable booster payload.

Luke
@lukealization
7 ч
@elonmusk Furthermore, M1D seems to have been uprated again. Is this a planned change or is this "fuller thrust" upgrade already built in?

Elon Musk
@elonmusk
@lukealization No physical changes to the engine. This thrust increase is based on delta qual tests. It is just tougher than we thought.
2:56 - 1 мая 2016 г.

Luke
@lukealization
7 ч
@elonmusk Does FH expendable performance include crossfeed? Crossfeed is generally off the table correct? Rather difficult to implement...

Elon Musk
@elonmusk
@lukealization No cross feed. It would help performance, but is not needed for these numbers.
2:58 - 1 мая 2016 г.

Elon Musk
@elonmusk
6 ч
@elonmusk F9 LEO payload on capabilities page (correct figure on main page) should be 22,800 kg

Elon Musk
@elonmusk
1 ч
F9 thrust at liftoff will be raised to 1.71M lbf later this year. It is capable of 1.9M lbf in flight.

Elon Musk
@elonmusk
Falcon Heavy thrust will be 5.1M lbf at liftoff — twice any rocket currently flying. It's a beast...
8:56 - 1 мая 2016 г.

 

Elon Musk
@elonmusk
Yeah, this was a three engine landing burn, so triple deceleration of last flight. That's important to minimize gravity losses.
8:51 - 6 мая 2016 г.