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A gravity turn is commonly used with rocket powered vehicles that launch vertically, like the Space Shuttle. The rocket begins by flying straight up, gaining both vertical speed and altitude. During this portion of the launch, gravity acts directly against the thrust of the rocket, lowering its vertical acceleration.
Pogo oscillation is a self-excited vibration in liquid-propellant rocket engines caused by combustion instability. [1] The unstable combustion results in variations of engine thrust, causing variations of acceleration on the vehicle's flexible structure, which in turn cause variations in propellant pressure and flow rate, closing the self-excitation cycle.
Most rockets need to be supported and held down for a few seconds after ignition while the engines build up to full thrust. The vehicle is commonly held on the pad by hold-down arms or explosive bolts, which are triggered when the vehicle is stable and ready to fly, at which point all umbilical connections with the pad are released. [2]
The SLS rocket was designated to replace the Space Shuttle program in 2011 and serve as the primary launch vehicle of the Artemis Moon landing program, but has faced nearly a decade of delays and ...
At this stage, the situation still seemed normal both to the astronauts and to flight controllers. At T+68, the CAPCOM informed the crew – "Challenger, go at throttle up", and Commander Francis R. "Dick" Scobee confirmed the call. His response, "Roger, go at throttle up", was the last communication from Challenger on the air-to-ground loop.
Space launch involves liftoff, when a rocket or other space launch vehicle leaves the ground, floating ship or midair aircraft at the start of a flight. Liftoff is of two main types: rocket launch (the current conventional method), and non-rocket spacelaunch (where other forms of propulsion are employed, including airbreathing jet engines).
Uncle Sam loves Rocket Lab. Soon after announcing its launch successes yesterday, Rocket Lab put out a separate press release, announcing it had "finalized" a $23.9 million award from the U.S ...
Rocket Lab (NASDAQ: RKLB) stock soared by another 16% through 11:13 a.m. ET Friday, putting it on course to close out this week with a 37% total gain.. The company manufactures (relatively) small ...