Structure for cooling helicopter tail rotor gearbox
US3966145A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1975 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Feb 28, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64D33/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A structure is provided for cooling the tail rotor gearbox of a single rotor helicopter having an anti-torque tail rotor mounted to a vertical stabilizer. The gearbox is mounted within the vertical stabilizer inside an air passage passing through the stabilizer. An air inlet is located in the vertical stabilizer on the side thereof opposite the tail rotor. An exhaust orifice is positioned in the vertical stabilizer on the same side of the stabilizer as the tail rotor. In operation the pressure differential over the vertical stabilizer caused by the rotation of the rotor causes ambient air to enter the inlet, pass through the passage, over the gearbox, and exit from the exit orifice thereby cooling the gearbox.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.