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PhilKravitz
Why is there no low cost space launch technology? The cost to buy the energy (in the form of electricity) required is very low (don't have the number on me).
russ_watters said:How do you define "low cost" and what does electricity have to do with it? The problem of launching an object into orbit is pretty straightforward and to do better than chemical rockets would require something pretty exotic.
There is a lot more than just energy required to launch a rocket. The force required to accelerate a rocket is based on momentum transfer from the rocket to the exhaust gases. Momentum transfer requires mass (photons are the exception*). Because mass is transferred to the exhaust from the rocket, the rocket loses mass, so the rocket has to carry this mass in addition to the energy needed to accelerate the expelled mass. Also, the acceleration rate has to be limited to a few g's (10?) in order not to crush the astronauts inside. See the rocket equations inPhilKravitz said:If one buy the joules per kilogram required to reach orbit from the electric company in the form of electricity it is well let see
1 kilo to say 1e4 m/sec using 1/2*m*v^2 is 5E7 joules
so 1 kilowatt hour at 20 cents from con edison is 3.6e6 joules for 20 cents. So 5E7 joules would cost about $3. Of course there are always losses in any system but even with only 10% eff. that would be $30 per kilo to orbit as far as energy costs are concerned. But rockets cost roughly $10,000 per kilo.
I do like the beamed power solutions I have been seeing articles about recently. Beam power to the "rocket" in the form of microwaves or as laser light.
Kinetic energy may be written (Newtoninan classical mechanics)PhilKravitz said:I do like the beamed power solutions I have been seeing articles about recently. Beam power to the "rocket" in the form of microwaves or as laser light.
Low cost launch technology refers to the development and use of methods and systems that reduce the cost of launching spacecraft or payloads into space. This can include innovative propulsion systems, reusable rockets, and streamlined manufacturing processes.
Low cost launch technology is important because it makes space exploration and research more accessible and affordable. It also allows for more frequent and diverse missions, leading to advancements in science, technology, and economics.
Some examples of low cost launch technology include SpaceX's reusable Falcon 9 rockets, Blue Origin's New Shepard reusable rockets, and Rocket Lab's Electron rocket, which uses 3D printing to reduce costs. Alternative propulsion systems, such as solar sails and ion thrusters, are also being developed to decrease launch costs.
The main challenges of developing low cost launch technology include the high initial investment required, the technical complexities involved, and the stringent safety and reliability standards for space missions. There is also competition from traditional, established launch providers.
Low cost launch technology benefits society by enabling easier access to space for scientific research, communication and navigation satellites, and commercial ventures. It also drives innovation and economic growth, creating new job opportunities and industries. Additionally, low cost launch technology can support disaster relief efforts and provide valuable data for environmental monitoring and climate research.