Rob Davidoff

[Rob Davidoff @eofpi]

@TJ_Cooney @JeffBezos Really impressive, I was hoping somebody would be able to do that when I saw the seam. Do you have the frames to do the same thing for around 25-28s where the booster and capsule are further away and the booster is ore side-on?

[Rob Davidoff @eofpi]

@JacobKluding @brickmack At about 20km long and 4 km wide in GEO, from the ground, the station would be about 2 by 0.4 arcseconds. About the size of an "I" on the line below 20/20 on the eyechart, I think? Mostly just barely notably not a dot, but with shape visible in binoculars.

[Rob Davidoff @eofpi]

@dominickmatthew @astro_Pettit Is this available on any other website like Youtube? I'd like to link this but not from this site.

[Rob Davidoff @eofpi]

@bscholl @boomsupersonic Thank you! It's interesting to see how bypass pays off for supersonic vs the early generation of similar bypass ratio subsonic engines back in the 60s.

[Rob Davidoff @eofpi]

@bscholl @boomsupersonic I see you did address bypass ratio being about 3 in some other comments, but anything about fuel consumption would be interesting (interested in comparing to Concorde's Olympus engines).

[Rob Davidoff @eofpi]

@bscholl @boomsupersonic Anything you can say about bypass ratio or thrust-specific fuel consumption? (Apologies if this is posted publicly someplace and I've missed it.)

[Rob Davidoff @eofpi]

@wooxheo @TAbusnardo @JohnPau88413033 @stoke_space pdf page 25: "Stage 1 and Stage 2 would break up upon reentry and would be expended into the ocean under the current Proposed Action. The potential reuse of the rocket would be analyzed in a separate NEPA document as the program matures."

[Rob Davidoff @eofpi]

@rainmagic9 @kmh @torybruno So I bet you install one, rotate the whole vehicle in the tooling, then install the other. The image with the engine positions not level Tory shared may be mid-rotation, hence everyone standing around and the second engine being craned in but not yet in final install position.

[Rob Davidoff @eofpi]

@rainmagic9 @kmh @torybruno I think there's a step between installing the two engines where they have to rotate the entire core 180 degrees. If you look at CERT-2, the engines have their turbopump stacks opposite directions for radial symmetry, but the two engines sit on their transport cradles the same way

[Rob Davidoff @eofpi]

@rainmagic9 @torybruno Also, if the rocket is horizontal, depending on boat-tail design, you can support the engine with a crane or something like seen here, and bring it up to the rocket relatively cleanly. Vertical rocket, you can't lift from above and have to support from below.

[Rob Davidoff @eofpi]

@rainmagic9 @torybruno Accessibility to engines vs rest of rocket has a lot to do with it, I think. If the engines are installed with the rocket vertical, then all the engines can be accessed from one work height, while install with the rocket horizontal allows easier access to the rest of rocket.

[Rob Davidoff @eofpi]

@capt_ramius @torybruno Regenerative

[Rob Davidoff @eofpi]

@KillerOfNightVR @ThunderWolf08 You can download footprint drawings from the environmental approval here:

https://t.co/VxTZiyyIHh

(Attachment F)

Lucid Stew used these to make a video that's up on Youtube attempt to animate the line:

https://t.co/fL7W2NFEgJ

[Rob Davidoff @eofpi]

@StarfleetDesign I wonder if a similar effect explains the jump in Season 4 of Voyager, Seven's introductory season.

[Rob Davidoff @eofpi]

@Truthful_ast Do you have dates or document links for these images?

[Rob Davidoff @eofpi]

@hutcheson_otis @GTCarfree Authority says it'll have canopies here:

https://t.co/13U9w6Bsqv

[CA High-Speed Rail 🚄💨 @CaHSRA]

@GTCarfree That is just a reality we must plan around. But as you yourself note, parking here will provide for flexible future development. (It’ll also be covered in solar canopies).

This project moves forward in a building block approach toward big changes. (3/3)
https://t.co/iuf36pe9WD

[Rob Davidoff @eofpi]

@Orbital_Perigee Vacuum engines are just like that, you don't need a lot of pressure to get good ISp. Compare that the SSME and RL-10 have about the same vacuum ISp...

[Rob Davidoff @eofpi]

@torybruno @TrevorMahlmann @ulalaunch Thanks. Trevor did all the hard work (well, all the hard work not already done by your team). I just did a quick photoshop scale & overlay.