There are some interesting efforts in this direction. Not “without” propellants but with much less. There’s Spinlaunch, the company developing a kind of catapult that gets small rockets high into the atmosphere. And there are efforts to launch smaller rockets from the wings of high altitude planes.
We should not be “happy” with the current state of things. Anyone who’s played Kerbal Space Program knows what a lousy deal it is launching chemical rockets off the ground. A tiny bit more payload and you need more fuel, more fuel adds more weight and you need more more fuel…
Rocketry is currently a tiny proportion of emissions so I’m not worried about it. But neither am I complacent about current technology.
There are some interesting efforts in this direction. Not “without” propellants but with much less. There’s Spinlaunch, the company developing a kind of catapult that gets small rockets high into the atmosphere. And there are efforts to launch smaller rockets from the wings of high altitude planes.
We should not be “happy” with the current state of things. Anyone who’s played Kerbal Space Program knows what a lousy deal it is launching chemical rockets off the ground. A tiny bit more payload and you need more fuel, more fuel adds more weight and you need more more fuel…
Rocketry is currently a tiny proportion of emissions so I’m not worried about it. But neither am I complacent about current technology.