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91
Hawk is up to something :)  destination Tampa.

92
SpaceX Mars / Re: Elon The Boring Company
« Last post by DistantTemple on 04/22/2018 07:34 PM »
That makes sense. The higher the speed, the longer the acceleration and deceleration ramps at each station, and hence the separation of stations. The pods will be able to travel at different speeds and there will be high speed long distance lines and lower speed local lines. No way of avoiding double tunnels for long distances. Perhaps local lines will have single tunnels making loops to effectively cover more territory... a very interesting optimization problem! User selects destination and computer selects optimal route. Probably higher speed tunnels will run deeper and connections between low speed local tunnels and high speed long distance tunnels will be completely underground (shorter ramps). From the ground you access only loca lines.
Its interesting that the latest map from TBC shows all the stations on little branches, none are technically "intermediate". I think (and others I imagine) that accurate engineering details and ideas are exposed in all such releases form EM's enterprises.
In terms of storing waiting sleds, and pods, the branch could be extended beyond the station. For merging into the main artery the capillary branch could curve in smoothly both North and South like a "y", with a largish radius, allowing joining traffic to speed up on the capillary, and merge at fairly high speed on the artery.
Some London Underground lines also use gravity, dropping out of one station, and rising to the next, to make use of potential energy to reduce motor and brake wear. TBC could make the capillaries shallower, dropping down before merging to the artery. If enough land is available (such as in suburbs) gradients would work instead of a lifts at some stations! This would allow a greater dispatch frequency.
93
Looking at it a bit harder, it really does seem like the Vac nozzles are larger.

They could easily be, since the last hard figures from SpaceX is a 10-11 m diameter and 103+ m height BFR system [ http://www.latimes.com/business/la-fi-spacex-port-la-20180419-story.html ]. Maybe the 10 % stretch drawings is actually mirroring a 10 % thicker CAD production design, a walk back to a Saturn V diameter design and making SLS look puny again.

There is still a lot of flux in the design. But the walk back to two SL engines were announced even earlier.
This was verbal from "Bruce McHugh, director of construction and real estate", not a BFR engineer. Others on NSF assume that his "about 35ft" is not the body, but includes the delta "wings". Also detailed analysis of the Mandrel photos correspond with a 9m diameter, and that's much more of a "hard figure". There could be flux in the length, but a different diameter would need a lot of new tooling.

Ah,yes; I forgot about the tooling images. Thx!

And it is reasonable that the estate guy was quoting max widths.
94
Quote
The first stage booster from @NASA_TESS's @SpaceX launch, B1045, is back in port aboard the drone ship Of Course I Still Love You. This is the 24th successful Falcon booster recovery from SpaceX.

https://twitter.com/nasa_tess/status/988129786194210816
95
SpaceX Mars / Re: Time for NASA to buy Tickets?
« Last post by DistantTemple on 04/22/2018 07:14 PM »
If the ALSTAR Act passes, a rocket not designed at the Marshall Space Flight Center can't be good enough for NASA.

I was jot aware that this was proposed.  It would be awful if it passes.  Looks like congress is just trying to keep NASA relevant.

These "Sense of the..." House/Senate/Congress resolutions do not carry the force of law, they are merely a stated opinion. Congress can later refer to them in justifying a law, but that legislation still has to get through the filter of committee and  presidential counter-bargaining or a veto. More often than not, they are ignored - looked on as patting the head of an upset group of members..
Sounded worrying, so searched NSF - nothing... google almost nothing... then Eric Berger:https://arstechnica.com/science/2018/03/alabama-lawmaker-seems-desperate-to-keep-rocket-tech-in-his-home-state/ ! and now thankyou docmordrid... its hot no lukewarm air. There is also a cost analysis, that says it will not cost anything!
96
Other US Launchers / Re: US Launch Schedule
« Last post by ChrisGebhardt on 04/22/2018 07:09 PM »
MODERATOR NOTE

In consultation with Chris B., I wanted to take a minute to make sure we're all on the same page with this thread and its updates.  Many people and outlets use this thread and view its well-kept schedule as "official NSF confirmation" of the U.S. launch calendar.

Therefore, from here on, we must make sure that only confirmed and credible news sources (NSF, other well-known space news sites, major media outlets citing confirmed information, payload customer press releases/tweets, etc.) are used to update this schedule.

I have re-edited an entry in the most recent manifest update accordingly.

Cheers,
Chris G.
97
Commercial Space Flight General / Re: JP Aerospace updates
« Last post by FutureSpaceTourist on 04/22/2018 07:03 PM »
Quote
Yesterday was an intense day, about 16 hours from first power up to locking the door. The team performed spectacularly.  Here we're walking the airship back to give us some room to run the engines.
#jpaerospace #ascender

https://twitter.com/johnmpowell1/status/988125441532678144
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SpaceX Mars / Re: Time for NASA to buy Tickets?
« Last post by Robotbeat on 04/22/2018 07:00 PM »
They still matter when proposal evaluators are deciding what Centers are allowed to do what, and what areas are allowed to have investments.
99
According to sources (One really, bocachicagal), the Grove crane is busy unloading stuff and the tequila plant fell over and is hopefully spawning baby Groots.
 I didn't expect to like the outback this much and probably won't be back gathering intelligence for another month or so.
 Next time I decide to sit around for two months sharing sandwiches with dingos or whatever, I'll try to remember to write down some numbers, so anyone who knows an IP from a donut can tap into the camera and get some shots over the fence when they come to town. I remember the address, but damned if all the beer these Aussies forced me to drink hasn't wiped out the login ID.

"admin" and "1234"?
100
SpaceX Mars / Re: Time for NASA to buy Tickets?
« Last post by docmordrid on 04/22/2018 06:48 PM »
If the ALSTAR Act passes, a rocket not designed at the Marshall Space Flight Center can't be good enough for NASA.

I was jot aware that this was proposed.  It would be awful if it passes.  Looks like congress is just trying to keep NASA relevant.

These "Sense of the..." House/Senate/Congress resolutions do not carry the force of law, they are merely a stated opinion. Congress can later refer to them in justifying a law, but that legislation still has to get through the filter of committee and  presidential counter-bargaining or a veto. More often than not, they are ignored - looked on as patting the head of an upset group of members..
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