3D printed rockets save on up front tooling, enable rapid iteration, decrease part count, and facilitate radically new designs. For your chance to win 2 seats on one of the first Virgin Galactic flights to Space and support a great cause, go to https://www.omaze.com/veritasium

Thanks to Tim Ellis and everyone at Relativity Space for the tour!
https://www.relativityspace.com/
https://youtube.com/c/RelativitySpace

Special thanks to Scott Manley for the interview and advising on aerospace engineering.
Check out his channel: https://www.youtube.com/user/szyzyg

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References:
Benson, T. (2021). Rocket Parts. NASA. — https://ve42.co/RocketParts

Boen, B. (2009). Winter Wonder: Rocket Icicles. NASA. — https://ve42.co/EngineIcicles

Hall, N. (2021). Rocket Thrust Equation. NASA. — https://ve42.co/RocketEqn

Benson, T. (2021). Rocket Thrust. NASA. — https://ve42.co/RocketThrust

Regenerative Cooling — https://ve42.co/RegenCooling

How A Gold Bullet Almost Destroyed A Space Shuttle by Scott Manley — https://ve42.co/ManleyEngine

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Special thanks to Patreon supporters: Burt Humburg, Blake Byers, Dumky, Mike Tung, Evgeny Skvortsov, Meekay, Ismail Öncü Usta, Paul Peijzel, Crated Comments, Anna, Mac Malkawi, Michael Schneider, Oleksii Leonov, Jim Osmun, Tyson McDowell, Ludovic Robillard, Jim buckmaster, fanime96, Juan Benet, Ruslan Khroma, Robert Blum, Richard Sundvall, Lee Redden, Vincent, Marinus Kuivenhoven, Alfred Wallace, Arjun Chakroborty, Joar Wandborg, Clayton Greenwell, Pindex, Michael Krugman, Cy 'kkm' K'Nelson, Sam Lutfi, Ron Neal

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Written by Derek Muller, Petr Lebedev, and Emily Zhang
Animation by Mike Radjabov
Filmed by Derek Muller, Raquel Nuno, Trenton Oliver, and Emily Zhang
Edited by Trenton Oliver
SFX by Shaun Clifford
Additional video supplied by Getty Images & Pond5
Produced by Derek Muller, Petr Lebedev, and Emily Zhang