Reusable Laser Launcher

A 50.0 MW laser beam energising a rocket with a jet power of 35.7 MW produces a laser energised rocket to create a 20,572 mph exhaust jet from inert material like water. This jet produces 1,741 pounds of thrust lifting a vehicle that weighs 1,358 pounds at lift off. 1,100 pounds (132 US gallons) contained in a sphere 39 inches in diameter, is energised over 12 minutes to boost the 330 pound payload to orbit aboard the 311 pound vehicle. After one orbit, the booster derbies and descends back at the launch centre, landing under laser power, 84 minutes after launch. Within 120 minutes after launch the booster is ready to go again!

Payload 330 pounds
Structure 311 pounds
Propellant 1,100 pounds (water)