Case histories are described in which measurable improvements in the cabin noise environments of the Bell 214B, 206B, and 222 were realized. These case histories trace the noise control efforts followed in each vehicle. Among the design approaches considered, the addition of a fluid pulsation damper in a hydraulic system and the installation of elastomeric engine mounts are highlighted. It is concluded that substantial weight savings result when the major interior noise sources are controlled by design, both in altering the noise producing mechanism and interrupting the sound transmission paths.
Helicopter internal noise control: Three case histories
1978-08-01
Conference paper
No indication
English
A Case Study of Attack Reconnaissance Helicopter Development Histories
British Library Conference Proceedings | 2008
|European Research into Helicopter Internal Noise
British Library Conference Proceedings | 1992
|ENGINEERING NOTES - Identifying Helicopter Control Gains Using Desired Output Histories
Online Contents | 1999
|