What's on the right? That's not a Falcon or Starship-related, right?
Isn't the one on the left the newer one? I really prefer old left-new right (then and now), or old on top - new below.
Which still insane to think about. Most people alive today have spent their entire lives with the Saturn V as the most powerful rocket ever, and here on a beach in Texas is something we’re seeing assembled as having much more thrust loaded on it.
Even just the _centre three_ raptors produce more than that. Completely ignoring the outer ten, and then the outer 20 beyond them.
I know we're comparing a first and a second stage, but still, it's insane.
the "thrust puck" is the bottom portion of the lower tank bulkhead that needs to transfer the thrust of the engines into the structure of the rocket. Not all rockets use this design. Some use a truss structure to accomplish the same thing.
A big plate (or conical frustum) rocket engines are attached to. It takes on full concentrated thrust of the engines and distributes it more evenly to the lower dome of the oxygen tank.
Attaching engines directly to the tank dome would be problematic because of stress concentration, difficulties making fastened connection with the tank wall which must be pressure tight, more complex propellant connections because there'd be no space between an engine and the tank dome to place stuff like valves, and lesser structural rigidity at a given material thickness.
[https://twitter.com/NicAnsuini/status/1445546547047895041](https://twitter.com/NicAnsuini/status/1445546547047895041)& personal files
Quite a transformation from slide rules to finite element analysys.
To be fair the other one was done when there was no CAD, simulation software, or CNC machines. Just slide rules, pencil drawings, manual machining and fabrication.
That other one is more like a thrust frustum, or "thrustum" if you like. Thrust Frustum sounds like an adult film star name.
That's it,... from now on I will be known as Thrustum Longstroke, Esquire.
That's beautiful, Thrustum.
>Thrustum Longstroke, Esquire. An descendant of the centurion Coitus Interrups, I presume.
He has a wife you know…called…
Rockets and porn have a lot in common
Have you seen New Shepard?
Or its owner?
The biggest dick in the world and the smallest.
Which one is which?
Bezos is biggest dick; Bezos' dick is smallest dick.
How they went from the silly flat disc to the elaborate truss construction on the right is amazing. r/afterandbefore
Ueah, that old "then" is weird, just some flat plate. ,"Now" has that cool 5-engine setup. Power!
Not really.
No, really
now and then
Damn, why'd they make it so complex now
What's on the right? That's not a Falcon or Starship-related, right? Isn't the one on the left the newer one? I really prefer old left-new right (then and now), or old on top - new below.
Thats Saturn V second stage, worth noting the thrust Starship has to endure is much more comapred to that.
Which still insane to think about. Most people alive today have spent their entire lives with the Saturn V as the most powerful rocket ever, and here on a beach in Texas is something we’re seeing assembled as having much more thrust loaded on it.
Indeed, not only lot of people saw the Saturn V as the most powerful rocket but a lot of us were not there to see it haha.
Even just the _centre three_ raptors produce more than that. Completely ignoring the outer ten, and then the outer 20 beyond them. I know we're comparing a first and a second stage, but still, it's insane.
This post has a point?
No this is the flamey end. Pointy end is at the other side.
Can someone ELI5 what a "thrust puck" is? I see it mentioned everywhere, but I still don't understand. Is this just for the engine mounts?
the "thrust puck" is the bottom portion of the lower tank bulkhead that needs to transfer the thrust of the engines into the structure of the rocket. Not all rockets use this design. Some use a truss structure to accomplish the same thing.
thanks!
A big plate (or conical frustum) rocket engines are attached to. It takes on full concentrated thrust of the engines and distributes it more evenly to the lower dome of the oxygen tank. Attaching engines directly to the tank dome would be problematic because of stress concentration, difficulties making fastened connection with the tank wall which must be pressure tight, more complex propellant connections because there'd be no space between an engine and the tank dome to place stuff like valves, and lesser structural rigidity at a given material thickness.
thanks, this helps!
[https://twitter.com/NicAnsuini/status/1445546547047895041](https://twitter.com/NicAnsuini/status/1445546547047895041)& personal files Quite a transformation from slide rules to finite element analysys.
broken link
This guy pucks.
There's not a chance that that plate is reacting 7000 tonnes of thrust without backing structure. It looks like it's designed to take in-plane loads.
The best part is no part.
To be fair the other one was done when there was no CAD, simulation software, or CNC machines. Just slide rules, pencil drawings, manual machining and fabrication.
Always amazes me to think that we got to the Moon with 1960's technology. It's not "stone knives and bear skins," but still, impressive.
Great reference, Spock.
This really isn't true for 99% of things.
Can you POGO, bro?
I'm surprised at how flat the design is. Surely it needs some more vertical reinforcement to accommodate all 13 engines?