LUCK88 RTP SLOT Since any one of these systems could fail and render the aircraft inoperable, redundancies are needed that greatly increase the complexity of the system. One of the earliest fittings of a hydraulic boost system was to ailerons on late-war models of the P-38L, removing the need for great human strength to achieve a higher rate of roll. Additionally, keeping the hydraulic oil pressurized is a constant power drain. Here, small valves were attached to the original control cables, controlling the flow of oil into an associated actuator connected to the control surface. In their early incarnations, hydraulic pumps attached to the engines fed high-pressure oil through tubes to the various control surfaces. All these systems require three separate components, the hydraulic supply system, the valves and associated control network, and the actuators.|As Shown in the Disassembly Photo