Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

A Method for Assessing the Impact of Wake Vortices on USAF Operations

Report Number: AFFDL TR 79-3060
Author(s): G. Kurylowich
Corporate Author: Control Dynamics Branch
Laboratory: Air Force Flight Dynamics Laboratory
Date of Publication: 1979-07-01
Pages: 110
Contract: Laboratory Research - No Contract
Project: 2403
Task: 240305
AD Number: ADA072967

Abstract:
Experience as a consultant to the Safety Office at Norton AFB led to compiling the engineering tools presented so that this report can be used by engineering personnel to investigate future incidents/accidents and existing USAF operations that are impacted by the vortical wake hazard. The approach presented is amenable to easy hand computations. Mixed airplane/helicopter operations can be assessed, since the engineering tools to determine the location and strength of the rotor downwash field behind a helicopter are presented. Finally, a simplified mathematical model is given to represent this hazard for use in USAF simulators, to make pilots aware of the problems associated with operating in wake-contaminated airspace.

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