The University of Southampton
University of Southampton Institutional Repository

Gyroscopic feathering moments and the 'Bell Stabiliser Bar' on helicopter rotors

Record type: Conference or Workshop Item (Paper)

Rotor blade feathering moments caused by the gyroscopic forces acting during helicopter pitching and rolling motions are identified. The consequent blade elastic feathering motion incurred by these moments are shown to give rise to blade flapping which reduces the pitch/roll cross-coupling due to the aerodynamic effects of pitch and roll motions. For blades of low feathering stiffness this reduction is considerable. Inclusion of this effect into rotor analysis can account for much of the difference between calculated cross-coupling and observed flight behaviour. This suggests that 'dynamic inflow' or other effects introduced to explain these discrepancies, should be re-evaluated.
The 'Bell Bar' rotor system is reviewed and it is shown that the stabiliser bar may be considered as an extension of the rotor blade, and gyroscopic feathering moments are a fundamental reason for its operation as a beneficial influence on helicopter flight behaviour.

Full text not available from this repository.

Citation

Simons, I.A. and Modha, A.N. (2002) Gyroscopic feathering moments and the 'Bell Stabiliser Bar' on helicopter rotors At 28th European Rotorcraft Forum. 17 - 20 Sep 2002. 8 pp.

More information

Published date: 17 September 2002
Venue - Dates: 28th European Rotorcraft Forum, 2002-09-17 - 2002-09-20

Identifiers

Local EPrints ID: 22089
URI: http://eprints.soton.ac.uk/id/eprint/22089
PURE UUID: 6c58d6a8-f3e2-4716-8683-5adccdded5bd

Catalogue record

Date deposited: 26 Feb 2007
Last modified: 17 Jul 2017 16:23

Export record

Contributors

Author: I.A. Simons
Author: A.N. Modha

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×