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A hydraulic cantilever tail lift on the back of a truck Four stages of deployment on an ambulance tail lift Control for a tail lift. A tail lift (term used in the UK, also called a "liftgate" in North America) is a mechanical device permanently installed on the rear of a work truck, van, or lorry, and is designed to facilitate the handling of goods from ground level or a loading dock to the ...
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Above statement is untrue (suspect Zepro employee aded this) The Tail Lift was first designed in 1948 by Ted Ratcliff and developed this in (If I remember right Edgeware or that area of Middlesex [now London]). His business still exists today as RatcliffPalfinger still in the premises in Welwyn Garden City, Hertfordshire UK.
BK 117 in 2018 In service as an air ambulance, 2008. During 1983, the initial production version, designated as the BK 117A-1 was first delivered. [5] Improved variants were quickly developed; in early 1985, the BK 117A-3, featuring an increased maximum takeoff weight and an enlarged tail rotor with twisted airfoils, was certified; two years later, the BK 117A-4, equipped with LTS 101-750B-1 ...
An all-moving tail was developed by the British for the Miles M.52, but first saw actual transonic flight on the Bell X-1; Bell Aircraft Corporation had included an elevator trim device that could alter the angle of attack of the entire tailplane. This saved the program from a costly and time-consuming rebuild of the aircraft.
Molniya-1. In 1920s George Fernic developed the idea of two lifting surfaces in tandem, together with a conventional tailplane. The small foreplane was highly loaded and as the angle of attack increased it was designed to stall first, causing the nose to drop and allowing the aircraft to recover safely without stalling the main wing.