Patent ID: 8282045

Claim:
Craft comprising a regenerative fuel cell energy storage system, a chemical propulsion system and a system for pressurizing propellants used for propulsion, comprising: a. wherein the energy storage system comprises a first tank containing a fuel, a second tank containing an oxidizer and a third tank containing a product resulting from the reaction between the oxidizer and the fuel; b. wherein the propellant pressurizing system comprises at least a fourth pressurizing tank and a fifth pressurizing tank, the fourth and fifth tanks each containing a pressurizing gas; c. one or more means for coupling the tanks of the energy storage system to the tanks of the propellant pressurizing system, these means comprising means for: i. draining the pressurizing tanks; ii. isolating the propulsion system from the pressurizing tanks; iii. isolating the pressurizing tanks from each other; and iv. connecting, when the pressurizing tanks no longer contain the pressurizing gas, the first tank to the fourth tank and the second tank to the fifth tank.