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re: Drove 6 hours this morning to see star ship launch
Posted on 3/14/24 at 4:21 pm to gmac8604
Posted on 3/14/24 at 4:21 pm to gmac8604
quote:
How did Nixon talk to Apollo 11 without transmission delay?
They weren't yelling into two cups with a long string.
The conversation was being transmitted at the speed of light and converted to sound at two receivers.
This post was edited on 3/14/24 at 4:24 pm
Posted on 3/14/24 at 4:28 pm to BourreTheDog
quote:
Unless you’re SpaceX exec, you’re not getting 1 mile from launch.
The best view is actually ~ 3 miles away, in Mexico, on the beach.
LINK
Posted on 3/14/24 at 4:33 pm to Trevaylin
The rocket itself is impressive to say the least. Not sure how the sound from liquid engines compares with solids.
I think the USAF measured the noise from a Titan 3 at 175 dB.
I think the USAF measured the noise from a Titan 3 at 175 dB.
Posted on 3/14/24 at 4:37 pm to tygerfan1
quote:
If the next falcon heavy goes off on schedule the 28th i'll be in Cocoa Beach. I'm excited. It's also the last one.
That March 28 launch is a United Launch Alliance Delta Heavy with a National Reconnaissance Office satellite cargo - and it is the last of the Delta Heavy vehicles - built in Decatur, AL.
Falcon Heavy has a long future ahead.
Posted on 3/14/24 at 5:25 pm to gmac8604
Light takes 2 seconds to reach the earth from the lunar surface, as it travels 299,000,000 m/s. Radio waves travel along that same band. There should have been a 2s delay in comms, unless technology exists on this earth that the 1960s US president wasn't even privy to know.
Posted on 3/14/24 at 5:41 pm to Trevaylin
It is in my bucket list to watch a launch. Always wanted to see a space shuttle launch, but they shut that program down before I was able to get over there for one.
Driving home from work the other day I did get to see the dragon module re-entry though. Very awesome!!
Driving home from work the other day I did get to see the dragon module re-entry though. Very awesome!!
Posted on 3/14/24 at 5:45 pm to gmac8604
Speed of light > speed of sound.
Plus, the astronauts were on a sound stage in Hollywood.
Plus, the astronauts were on a sound stage in Hollywood.
Posted on 3/14/24 at 7:25 pm to gmac8604
Judging by my downvotes, does light not travel at such speed as I stated? Why do you downvote facts?
Posted on 3/14/24 at 7:26 pm to Trevaylin
Did you get video with stereo sound?
Posted on 3/14/24 at 7:39 pm to Trevaylin
I can’t understand how American media barely even covers this shite. This should be absolutely fricking mind blowing to everyone on earth.
But no. Let’s just spout more political bullshite.
But no. Let’s just spout more political bullshite.
Posted on 3/14/24 at 7:49 pm to Trevaylin
Cool story! I lived in S Florida on the Atlantic Coast back in the early 90's and saw the Space Shuttle take off looking towards the north.
Posted on 3/14/24 at 10:31 pm to Trevaylin
I've been saying for, well prob 50 years I want to see a launch but never made it a priority. One day, one day, I'll make that happen. Glad you posted this.
Posted on 3/14/24 at 10:41 pm to 6R12
Video:
https://truthsocial.com/@imglover/112094288572135819
This post was edited on 3/14/24 at 10:42 pm
Posted on 3/14/24 at 11:01 pm to Trevaylin
Book a guide next time, a bunch of them down there were booking launch n fishing trips for today. Several posted some goods pics and videos. One day we'll go out and watch one off the boat, would really be bad arse to see a night one I'm sure.
Posted on 3/15/24 at 6:58 am to Fun Bunch
quote:
Wouldn't being able to take off from the Moon be a big time game changer, because there is no atmosphere and thus the amount of energy needed for takeoff would be drastically reduced?
Gravity is vastly more important than atmospheric drag when determining the forces acting upon a rocket. That being said, the moon's gravity is approx 1/6 that of Earth's.
There are 4 basic forces that act upon a rocket during flight; Thrust, Mass, Drag and lift. Given the small nature of the stabilization fins on most rockets, lift is usually negligible, and the effect of drag is much higher (usually from the cross sectional area of the rocket body). Resultantly, most rockets are evaluated not by how much lift they have, but by their thrust to drag ratio. Using vectored thrust nozzles, many modern rockets can eliminate stabilization fins get that number to almost zero. But of all the external forces trying to keep a rocket on the ground, it's gravity by a long shot. It's why the engines are massive and the fins are small. It's also why most rockets preform a "roll program" not long after launch. To change the vector angle and reduce the effect of grvity.
However, that's not the whole story. Like all objects, rockets have a center of mass, and the location of this center of mass effects their stability. In addition to center of mass, rockets also have what is know as a center of pressure. The center of pressure is defined as where the aerodynamic forces in the front of the rocket are equal to those on the back of the rocket. For a rocket to be stable in the atmosphere, the center of pressure must be behind the center of pressure. This has implication when building rockets on the distribution of fuel (often the heaviest part of a rocket) and payload. Obviously in the vacuum of space, the center of pressure is irrelevant. This gives designers much more flexibility in design and how to arrange cargo and fuel on a spacecraft.
This is also why the discovery of frozen water on the moon in the craters near the poles is so important. If it can by hydrolyzed the extracted hydrogen could be used for fuel (and the oxygen for life support). This would make the moon an ideal jumping off point for exploring the far reaches of the solar system and beyond...
This post was edited on 3/15/24 at 7:06 am
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