| 摘要 |
This Takeoff and Abort Instrument system, mounted on the pilot's instrument panel, will indicate to the pilot, as soon as the throttles are advance to the takeoff position and brakes are released if all engines are producing the designed takeoff thrust. During the takeoff run an ABORT indication will be visible to the pilot anytime the net aircraft linear acceleration degrades below that amount required to make a safe takeoff. This instrument assembly is comprised of two major components: A. A flexible transparent tube formed into a right triangle with the shortest leg being mounted vertically on the instrument face; this leg becomes a sight gauge up which a colored non-freezing liquid rises directly in proportion to the aircraft's linear acceleration. The longest leg connects the base of the sight gauge to a reservoir located forward of and level with the base of the sight gauge. The ratio of the height of the sight gauge to the distance between it and the reservoir is critical and is determined by the maximum thrust to Weight ratio for each category of aircraft. B. The face of the instrument has provisions for quickly adjusting the height of the TAKE-OFF and ABORT lines by the pilot to reposition them for changes in the obtainable linear acceleration due to variations in density altitude, takeoff weight, and runway slope.
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