The Saturn V's Rocketdyne J-2 engines had to push more than 300,000 pounds of propellant and gear, along with the Lunar and Service Modules plus the Apollo command crew. To achieve this ...

a toroidal aerospike concept intended as an improvement over the Rocketdyne J-2 engine for the Saturn V. Although promising ...

After traveling 42 miles skyward (for a Saturn V in flight), the first stage broke off and fell into the Atlantic Ocean. At that point, the second stage, shown here, fired its 5 J-2 engines to get ...