It was another design by Lockheed – the twin-engined P-38 "Lightning" fighter – which had helped spur the development of the ejector seat during World War Two. The P-38 had a novel design, with the two engines housed in long booms connecting to the tail and a small central section housing the pilot and armament. The two rail rudders at the rear of the plane were connected by a thick horizontal tail plane. This made the P-38 very difficult to escape if it was damaged. The pilot"s manual tried to gloss over this with a series of step-by-step guides to successfully exit a damaged P-38, perhaps forgetting that a pilot might be coming under fire at the time.