How The Space Shuttle Worked | Full Documentary — Real Engineering

Quick Overview

The Space Shuttle was a revolutionary reusable space plane, powered by three main liquid-fuel engines and two massive solid rocket boosters, designed for complex missions like satellite rescue. Its intricate engineering included unique fuel management, precise thrust vectoring, and a sophisticated reaction control system, all managed by fly-by-wire computers, with a notable manual override for landing gear deployment. The STS-49 mission successfully rescued a stranded Intelsat satellite through an unprecedented three-person spacewalk and the precise operation of the Canadarm, overcoming initial capture failures and thermal warping issues with the payload bay doors.

Key Points: The Space Shuttle launched with three main liquid-fuel engines and two solid rocket boosters (SRBs), which were the largest ever made, each providing 13,000 kilonewtons of thrust. The SRBs, once ignited, could not be throttled or stopped, and their fuel cavity was shaped with an 11-point star in the upper section to control thrust, reducing it by 33% 50 seconds into flight. At 2 minutes into flight, the SRBs separated from the external tank, a process astronaut Bruce Melnick described as a 'big bang and then you're in this Fireball' due to the exhaust from separation motors. The external tank was the largest design compromise, being a non-reusable structural backbone that contained liquid oxygen (LOX) and liquid hydrogen (LH2), with LOX placed on top to raise the center of gravity for stability. The STS-49 mission successfully rescued a stranded Intelsat satellite after initial capture attempts failed, leading to an unprecedented three-person spacewalk to manually grab the satellite. Astronaut Bruce Melnick, a Coast Guard helicopter pilot, expertly operated the 15-meter Canadarm, which could move 30 tons in orbit despite weighing only 430 kg, to secure the capture bar to the satellite. The Orbiter's payload bay doors, made of graphite epoxy composite, initially failed to latch on STS-49 due to thermal warping, but the crew resolved this by orbiting in 'barbecue mode' to equalize temperatures.