Why SpaceX and NASA Rockets Are So Different

Video from the channel Beyond Facts about SpaceX, linked on its Above Ten Thousand entry. Duration: 10:31. Language: English. Video type: Documentary.

An explainer piece that compares the design philosophy of NASA's and SpaceX's rockets and attributes it to different goals and funding models. The agency, funded by the US Government, prioritises deep-space missions with reliable single-use vehicles. The private company depends on the revenue from each launch and contract, which is why it bets on reusability to bring down the cost of access to space and increase flight cadence.

The video looks back at the Saturn V, with five expendable F-1 engines, and the Space Shuttle, whose orbiter and solid boosters were reused but not the external tank. The cost of refurbishing it and the losses of Challenger in 1986 and Columbia in 2003 led to its retirement in 2011. Against this backdrop it places the Falcon 9 and Starship, designed from the outset to fly multiple times, and mentions the current collaboration between both organisations and the Artemis programme.

It contrasts the aluminium-lithium alloy of the SLS with Starship's stainless steel and reusable ceramic tiles. Super Heavy carries 33 Raptor engines, smaller than the F-1, and can lose one or two without jeopardising the ascent. It also recounts the anecdote that Elon Musk partly drew inspiration from the 2012 film The Dictator for the aesthetic of his rockets.