Why are the concepts of photonic propulsion always using a laser on Earth? Could you not mount lasers on the craft itself? - Quora
![ToughSF on Twitter: "A laser-heated turbofan with Mach 1 exhaust would weigh more, but reduce the launch power requirements from the commonly stated 1 MW/kg to about 1.7 kW/kg. It can transition ToughSF on Twitter: "A laser-heated turbofan with Mach 1 exhaust would weigh more, but reduce the launch power requirements from the commonly stated 1 MW/kg to about 1.7 kW/kg. It can transition](https://pbs.twimg.com/media/ECM0qcwWwAc5eDX.png)
ToughSF on Twitter: "A laser-heated turbofan with Mach 1 exhaust would weigh more, but reduce the launch power requirements from the commonly stated 1 MW/kg to about 1.7 kW/kg. It can transition
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Launching lightcraft from the edge of space OR Rockets With No Gravity Turn - Science & Spaceflight - Kerbal Space Program Forums
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