Rohr, Inc.

John J Anderson

Michael R Aten

Donald O Nelepovitz

James F Steckbeck

Eric R Balders

Leslie Travis

Ken Schertzer

An acoustic panel is provided that includes a first skin, a second skin and a core structure. The core structure is connected to and forms a plurality of cavities between the first skin and the second skin. The cavities include a first cavity and a second cavity. The first cavity is fluidly coupled with one or more first perforations in the first skin. The second cavity is fluidly coupled with one or more second perforations in the second skin.

Two-way acoustic panel

An enhanced electrical harness arrangement for an aircraft engine that is arranged to provide optimum protection of the electrical conductors from extreme thermal, EMI, vibration and chafing problems encountered in service. The harness arrangement provides a high degree of repairability thereby ensuring a long service life for the harness wile also minimizing the time required for necessary repairs to the electrical conductor terminals. A repair splice member has an electrical conductor bundle inserted through it and is spaced from a connection of the electrical conductor bundle to an aircraft gas turbine engine. The repair splice member is placed within an outer protective layer of the harness and is provided with shoulder portions, as is the backshell, for accommodating removal and replacement, as required, of protective layers of the harness positioned between the repair splice member and the backshell thereby permitting unraveling or damaged portions of the protective layers to be replaced and electrical conductor connections to be repaired in an airworthy repair procedure without the necessity of replacement of the entire harness in the field. A method for conducting such repair procedures for the harness arrangement is disclosed.

Method and arrangement for easily repairing electrical harness for

A method and apparatus for bonding high temperature structures, such as face sheets to high performance honeycomb cores, using differential gas pressure at high temperatures. A high temperature resistant, foil sheet having a thickness of from about 0.0005 to 0.003 inch is welded to a support to form a vacuum bag to surround the structure to be bonded. A vacuum line is connected to the bag to allow evacuation of the bag. Typically, the structure is bonded in a vacuum furnace. Initially, the furnace is heated to the bonding temperature of the assembly while both the furnace chamber and the vacuum bag are substantially completely evacuated. Then slight pressure is allowed to return to the chamber to force the foil sheet into intimate presure contact with the structural assembly to bring the components tightly together, using the relative pressure different between the vacuum in the chamber and the vacuum within the bag. The bag material may have superplastic deformation characteristics to allow uniform pressure to be applied to complex shaped structures. The bag and structural assembly are then cooled below the bonding temperature of the assembly. This process and apparatus are particularly suitable for bonding face sheets to honeycomb cores where those components are formed from a metal such as titanium or Inconel and the components are bonded together by a thin layer or brazing material on the surfaces of the face sheets such as by liquid interface diffusion bonding.

Growing community of inventors

San Diego, CA, United States of America

John J Anderson