The Hiroc missile used liquid oxygen as its oxidizer, and alcohol for its fuel. The Hiroc missile had separate tanks for its fuel and oxidizer, which were instead contained in one tank separated by two bulkheads. The airframe of the rocket was supported by nitrogen gas pressure inside the tank, which could contain propellant or nitrogen gas when stored. Having gas pressure provide rigidity to the structure reduced the empty weight by requiring less metallic components for structural reinforcement, but made the missile fragile because it required continuous pressurization. The RTV-A-2 Hiroc had an airframe to propellant ratio three times better than the V-2.