Abstract: Systems and methods for providing an enhanced head up display to an aircraft pilot are disclosed. According to a first aspect of the present invention, a system for increasing pilot situational awareness is disclosed. The system includes a navigational component that determines one or more of an aircraft location and attitude. The system also includes a scene generator that produces one or more virtual images of the space into which the aircraft is flying based, at least in part, on the aircraft location and/or attitude. The system further includes one or more head up displays that display the one or more virtual images to facilitate increasing pilot situational awareness. Other systems and methods for providing an enhanced head up display are also disclosed.

Abstract: Method and apparatus for cushioning continuous exothermal reactions with or in the presence of liquefied gases having a reactor, a condenser connected to the reactor, an accumulator connected to the condenser and a gravity fed cooling medium supply vessel providing cooling to the condenser. A first blocking valve which responds to excess pressure is inserted in the line between the reactor and the condenser and a second blocking valve, actuated synchronously with the first valve, activates the flow of the cooling medium through the condenser.