Using Wind Tunnel Tests for Slung-Load Clearance, Part 1: The CONEX Cargo Container

Autor: Aviv Rosen, Luigi S. Cicolani, Reuben Raz, Jeffery Lusardi
Rok vydání: 2014
Předmět:
Zdroj: Journal of the American Helicopter Society. 59:1-12
ISSN: 2161-6027
DOI: 10.4050/jahs.59.042003
Popis: Previously, the authors showed that dynamic wind tunnel tests of a suspended CONEX cargo container model exhibited encouraging levels of success in predicting the stability characteristics and speed envelope of the full-scale load. The present study includes further use of the UH-60/CONEX system to investigate effects that were observed previously, but not fully addressed. These effects include the influence of pilot inputs and helicopter motions on the coupled pilot/helicopter/slung-load dynamics, the influence of center of gravity offset of the slung load, and the behavior of a load when a yaw swivel is not used in the suspension. It is shown that all three effects are important and affect the slung-load dynamics. The capability of wind tunnel tests to predict the behavior of slung loads in flight is shown for these effects.
Databáze: OpenAIRE