Space General Space News, Image and Discussion Thread

Husky_Khan

The Dog Whistler... I mean Whisperer.
Founder
Meme about the famous pen and pencil story.

FKJ7XqvXsAE3TVa


Learn something new.
 

Bacle

When the effort is no longer profitable...
Founder


You would think a big cruise company like Royal Caribbean would have it's crews up to speed on how to handle NOTAMs and off-limits zones around Cape Canaveral at this point.
 
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bintananth

behind a desk


You would think a big cruise company like Carnival would have it's crews up to speed on how to handle NOTAMs and off-limits zones around Cape Canaveral at this point.

That's assuming Carnival actually cares about such things.

They don't because Janie in her bikini is a paying customer. SpaceX is not.
 

Husky_Khan

The Dog Whistler... I mean Whisperer.
Founder
The only reason they should care is because of fines, not due to SpaceX and their perennially delayed launches. SpaceX isn't the only company that has a schedule to keep to. 🤷‍♀️

I don't even know if this story is particularly newsworthy since nothing happened but if we're going to cast blame... I wouldn't put it all on the Cruise Line.
 

Bacle

When the effort is no longer profitable...
Founder
So correction for the cruise ship story; turns out it was a Royal Caribbean ship, not Carnival, that intruded into the restricted area.
 

LordSunhawk

Das BOOT (literally)
Owner
Administrator
Staff Member
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2 cruise ships left port at that time, one stayed clear of the exclusion zone, the other sailed into it and is now being investigated.
 

Captain X

Well-known member
Osaul
I wonder if someone thought they would give their passengers a nice front row seat to a space launch. :unsure:
 

bintananth

behind a desk
I wonder if someone thought they would give their passengers a nice front row seat to a space launch. :unsure:
When Saturn V's were being launched there was a several mile wide exclusion zone because if something went wrong with a Rocketdyne F-1 during liftoff you're getting a mushroom cloud.

NASA actually expected that and the first stage of a Saturn V was designed in such a way that it could lose an F-1 during the climb to outer space and still reach orbit ... which happened at least once.
 

bintananth

behind a desk
I was thinking about this and came to the conclusion that SpaceX is very intellingent in how they go about things when designing and building a rocket motor.

If they were going for broke by trying to wring the maximum amount of specific impulse possible they wouldn't be using LOX/RP-1 or LOX/Methane.

They'd be attemping to use an absolutely batshit crazy mixture like chlorine pentafluoride/liquid lithium/liquid helium. Lithium is more reactive than hydrogen and will set water on fire just by saying "hi". Here's the list of things ClF5 doesn't react with: something that's been fluorinated to the limit, helium (maybe), and that's it.
 
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Undertone

Active member
A shoutout to NERVA! - NASA's space-capable rocket powered entirely by nuclear energy. Ready to fly in 1969, but cancelled in 1973.

Fundamentally it was a "steam" rocket -- the business end uses the thermal power of the nuclear reactor to flash a liquid into exhaust gas.

The reactor design was optimized for liquid hydrogen as the working fluid, and its vacuum Isp of 840 seconds doubled the performance of the best rockets of the time.

640px-Drawing_of_the_NERVA_nuclear_rocket_engine_GRC-2003-C-00851.jpg
 

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