Revisiting Roskam’s Empirical Predictions for Landing Distance
Timothy T. Takahashi
Abstract
View Video Presentation: https://doi.org/10.2514/6.2021-2447.vid This paper revisits Roskam’s empirical methods to estimate landing performance of a conventionally configured subsonic aircraft. Here, based upon a survey of current production and last-generation flight manuals we demonstrate that Roskam’s landing equation is excessively pessimistic. A combination of flight manual “certified performance” data, along with extensive numerical simulations of candidate designs, support two new equations to estimate landing performance: 1) an equation for dry runway operation that takes into account the superior capability of modern braking systems and 2) an equation for wet runway operations.
Topics & Concepts
RunwayComputer scienceAirplaneAtmospheric modelAeronauticsAerospace engineeringEngineeringMeteorologyPhysicsArchaeologyHistoryAerospace and Aviation TechnologyAir Traffic Management and OptimizationAdvanced Aircraft Design and Technologies