Aircraft fuselage drag reduction blivet
US8783617B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2012 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Nov 25, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An air vehicle fuselage adapted for transonic operation is disclosed. The fuselage has a body and a close-out. A lower surface of the body has a waterline value that varies along a fore-aft direction of the fuselage and is equal to a first waterline value at a forward end of the close-out and rise to a second waterline value at an aft end of the close-out. The lower surface has a drag-reduction blivet that includes a first region wherein the lower surface drops to a point comprising a third waterline value that is below the first waterline value and a first inward radius and then rises over a second region disposed aft of the first region wherein a second radius that is a minimum radius of the lower surface within the second region is greater than the first radius.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.