New Mars Forums

Official discussion forum of The Mars Society and MarsNews.com

You are not logged in.

Announcement

Announcement: As a reader of NewMars forum, we have opportunities for you to assist with technical discussions in several initiatives underway. NewMars needs volunteers with appropriate education, skills, talent, motivation and generosity of spirit as a highly valued member. Write to newmarsmember * gmail.com to tell us about your ability's to help contribute to NewMars and become a registered member.

#26 2021-07-23 14:13:01

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,740
Website

Re: Starship Booster Prototypes beginning soon

An exclusion zone of 3 miles means completely evacuating SpaceX Starbase, and evacuating the entire town of Boca Chica, and closing Boca Chica beach. Boca Chica Blvd (hwy 4) would have to be closed to Quicksilver Ave. Hmm, there's more than one road called Quicksilver Ave, I mean the western one, farther from Boca Chica. Google Maps shows a large building of some sort on the Rio Grande river at Tarpon Bend, on Rio Grande Drive near Richardson (a dirt road). That would have to be evacuated too.

I see why Elon purchased a couple off-shore oil platforms.

Offline

#27 2021-07-23 15:06:08

kbd512
Administrator
Registered: 2015-01-02
Posts: 4,608

Re: Starship Booster Prototypes beginning soon

Robert,

We use what is effectively a subterranean block house to protect NORAD personnel against near misses from Megaton-class nuclear warheads.  Perhaps nobody can remain above ground when we light this candle, but is there any reason why an underground steel blockhouse couldn't withstand the force of the blast from an on-pad explosion?  At least in theory, it seems like that should be doable, although I don't know enough about the water table there to speak to the practicality of that solution.

Offline

#28 2021-07-23 15:07:55

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,740
Website

Re: Starship Booster Prototypes beginning soon

kbd512,
True. Mercury and Gemini used a block house. SpaceX could too.

Offline

#29 2021-07-23 19:57:17

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,073

Re: Starship Booster Prototypes beginning soon

SN10 gave a preview to the blast possibilities when it had little fuel remaining onboard when it exploded and metal pieces were found quite a ways from the site so what would a tank full do for throwing those same pieces of shrapnel with a much stronger blast due to lots more fuel....

Offline

#30 2021-07-24 09:57:33

GW Johnson
Member
From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 4,570
Website

Re: Starship Booster Prototypes beginning soon

There are other things to worry about than just an explosion on or near the launch pad.  That's bad enough when you deflagrate 3400 tons of propellant in the booster plus another 1200 tons of propellant in the second stage/spacecraft.  That's 4600 tons of low explosive,  sort of like black powder,  but more energetic,  more like dynamite.  Just slower to burn than dynamite.  Takes a second or so,  instead if a millisecond or so.

You have to worry about where the thing will come down if it fails several seconds to a minute or so after launch,  and which way it will be flying if it goes way off course.  Something that big needs a mile or two radius superposed around an off-site strike point,  which in turn could be a few miles off site.  Now you know why the oil rigs Musk bought are some 10 miles off shore.  This thing is like the old risks associated with Nova and to some extent the N-1.  It needs a 10 mile radius to keep the public safe.

GW


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

Offline

#31 2021-07-26 21:20:55

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,073

Offline

Board footer

Powered by FluxBB