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- Publisher
- Emerald Publishing
- Copyright
- Copyright © Emerald Group Publishing Limited
- ISSN
- 0002-2667
- DOI
- 10.1108/eb032021
- Publisher site
- See Article on Publisher Site
Abstract
In this paper results arc discussed of windtunnel smoke tests with a small helicopter rotor. The test apparatus includes a specially developed hotwire smokegenerator. An attempt is made to describe the flow pattern in the neighbourhood of a helicopter rotor in the vortex ring state by introducing the spread of the slipstream, causing an airbody around the rotor. By considering the proportions of this airbody the unpleasant behaviour of helicopters in the partial poweroff descent at low forward speeds can be more clearly understood.
Journal
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Apr 1, 1951