Kapitanova L. Analysis and Synthesis of Takeoff and Landing Performance of Transport Category Airplanes

Object of research take-off and landing performance (TLP) of transport category aircraft modifications; goal of research creation of method of TLP improvement of transport category aircraft modifications to the values assigned for base model; methods of research are based on the requirements of FAR-25, ICAO as per standardized parameters for takeoff and landing, and on the basis of a new method of forming thrust-to-weight ratio of heavier modification and use of fundamentally new local structures in the wing (slotted spoilers in flaps (FSS)) and in the landing gear (with additional energetic chambers (AEC)), evaluation of effectiveness of the FSS is based on computational models and experiments (copra tests), the FSS efficiency is evaluated by blowing a highly mechanized wing in the wind tunnel; the results the use of a new method of forming thrust-to-weight ratio of heavier modification, and of FSS and AEC allowed to reduce the takeoff run length by 26…28 %, landing run length by 35…38 %; novelty for the first time a package of new conceptual and structural provisions for TLP formation has been proposed and implemented, which ensures the use of more productive modifications at aerodromes assigned for base aircraft; for the first time a new method of forming the basic parameters of modifications (starting weight and thrust-to-weight ratio) has been developed; for the first time the use of spoilers in the slotted retractable flaps (FSS) has been proposed, the damping systems of landing gear struts have been improved by applying AEC; the influence of imbalance of landing mass of modification by lifting force of a wing (at the moment of landing of the plane) on CG shift on ground sites of non-braking landing run has been set that provides earlier application of brake devices and reduction of a site of non-braking run which provides basing the heavier modification of the An-140-200 on a runway; the degree of implementation research results have been used and implemented at "FED" JSC, "Progrestech-Ukraine" LLC, PFM Research Institute, Antonov Company and in the educational process of the National Aerospace University "Kharkiv Aviation Institute"; field of application designing of aircraft.