On-board aircraft auxiliary power systems having dual auxiliary power units
US8622342B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2011 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Apr 23, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64D2041/002
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Aircraft are provided with a pair of auxiliary power units (APUs) adjacently mounted in parallel relative to one another within the tail cone section of the aircraft's fuselage. In some embodiments, the APUs are mounted generally vertically adjacent to one another. Alternatively, the APUs may be mounted generally horizontally adjacent to one another. The aircraft fuselage may include a pair of downwardly and outwardly oriented strakes adjacent the tail cone having lower edges which establish a maximum take-off pitch angle of the fuselage and define a spatial zone therebetween. The APUs are positioned within such a spatial zone defined between the strakes so that the maximum take-off pitch angle is not required to be changed when modifying an existing single APU aircraft with dual APUs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.