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Experience providing Professional Services

ART Projects by GSA Contract SIN #

SIN 871-3 System Design, Engineering and Integration

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      Project 13

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SIN 871-4 Test and Evaluation

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Project 13: Sling Load Modeling for Handling Qualities Analysis

Summary of Services Performed: Modeling and validation of sling loads for handling qualities analysis

Slung load handling is a unique capability of rotorcraft widely applied in support of cargo transportation, rescue, and the special construction in areas where no other air or ground vehicles can operate. The presence of a sling load can degrade rotorcraft handling qualities and reduce the flight envelope. This project has successfully developed a multi-body and unsteady rotorcraft/sling load modeling and simulation tool in FLIGHTLAB for an accurate assessment of Advanced Rotorcraft Technology, Inc. the sling load dynamic stability and the operational envelope. The sling load modeling tool developed can simulate arbitrary sling load configuration under influence of unsteady sling load airloads. The coupled rotorcraft/sling load modeling tool developed was applied for simulating the sling load operation of UH-60L and CH-47D helicopter. The simulation results were compared with measured sling load flight test data and a very satisfied agreement was obtained. The simulation model was also integrated with ART's HeliFlight simulator and a pilot-in-theloop evaluation was conducted that further validated the simulation.