What would be necessary in order for us to achieve a single stage …
2018年8月16日 · Single-Stage-to-Orbit can be done, but it's horribly inefficient. This is because of the Tyranny Of The Rocket Equation which basically says in order to get more mass into space you need more fuel which means more mass which means more fuel...
Is SpaceX's Starship single stage to orbit?
In particular, instead of "launch the Mars starship, then 6 refueling missions in quick succession, and hope all of them go well, while crew to Mars waits in orbit till they have departure fuel", one could launch the SSTO starship, fuel it full in orbit through 6 refuel launches (reusable), and if everything goes well, launch the Mars starship ...
record - Has humanity launched a SSTO ... ever? - Space …
2015年11月4日 · Yes, technically humans have launched to orbit with a single stage -- the Apollo lunar excursion modules launched from the Moon's surface to lunar orbit using a single stage. As for Earth orbit, there have not been any true single-stage-to-orbit launches since the vehicle should not jettison any components to be considered true SSTO. However ...
Why do rockets have multiple stages? - Space Exploration Stack …
2021年12月7日 · Given that $\Delta v$ to low Earth orbit is about 11 km/sec (about 9.4 km/sec ignore drag and gravity losses, plus another 1.6 km/sec after accounting for this effects), a single stage to orbit rocket would need to have an exhaust velocity of about 4790 meters per second. There are no chemical rocket engines that have this high of an exhaust ...
Could rotating detonation engines help create a successful single …
2023年1月28日 · I noticed NASA's demonstration engine uses an aerospike engine nozzle which is great for single stage to orbit (SSTO) attempts due to its ability to be optimized for both vacuum and sea level conditions. Although this was likely not its purpose, I am curious if this type of higher efficiency engine could help make SSTO a reality.
orbit - How many stages needed for a launch ? How to plan a …
2019年6月13日 · A single-stage rocket approaching the end of its burn is still lugging around an almost-empty fuel tank. You could split that evenly into two stages, allowing you to drop the half the weight of your fuel tank halfway through the burn, but now, you need a second engine (one for the first stage, one for the second), as well as some way to ...
Which launch vehicles are considered SSTO?
2014年1月24日 · $\begingroup$ SSTO is perfectly possible but way below the cost curve of multi-stage with $/kg to orbit cost as it needs to lift all the dead weight of atmospheric launch engine while switching to much more efficient (but lower thrust) orbital ones.
What are the advantages of SSTO craft over Multi-stage crafts?
A distinction should be made between 'Single-Stage Orbiters' and REUSEABLE single stage orbiters. The Space Systems/Loral company investigated a design about 15 years ago called 'Aquarius', that would have put a metric ton and itself into low orbit. It was to be ocean launched and so would have had zero launch facility costs.
What's a realistic cadence for refueling an HLS Starship on-orbit?
2024年10月14日 · This would decouple the "get propellant to orbit" timeline from the "launch HLS and refill it" timeline. It would also mean that the risk of multiple dockings and propellant transfers is shifted from the "few-of-a-kind" HLS variant to the "dime-a-dozen" standard variant (or a yet-to-be-developed tanker variant). $\endgroup$
orbital mechanics - Space Exploration Stack Exchange
2017年4月10日 · If we consider Mars, with its relatively low gravitational acceleration and low density atmosphere, I had always assumed that if we have a single-stage-to-orbit launch vehicle on the surface of Mars that is required to achieve a stable circular orbit upon engine cutoff, the most fuel efficient method would be to perform a single engine burn in ...