Middle River Aircraft Systems (MRAS) – the business unit that is one of Nexcelle's two parent companies – this month is marking two decades under GE ownership, which has seen this operation develop world-class capabilities in jet engine nacelles, along with composites for application in propulsion systems and aerostructures.

The facility that is home to MRAS today traces its origins to 1929, when aviation pioneer, aircraft designer and manufacturer Glenn L. Martin moved his rapidly-growing corporation from Cleveland Ohio to Middle River, situated northeast of Baltimore, Maryland. Access to water, rail, road, and proximity to the U.S. nation's capital in Washington, D.C. were key factors behind the move – placing the facility adjacent to what is now named Martin State Airport.

During his career, Martin designed more than 85 different aircraft (totaling 11,000 units built), and employed more than 53,000 people during the peak of World War II.

The Middle River factory assembled some of Martin's iconic aircraft, notably the M-130 flying boat for Pan American Airways during the 1930s (including the famous China Clipper); and the PBM Mariner, a flying boat patrol bomber of World War II that performed anti-submarine missions and surveillance in the Atlantic and Pacific.

Through subsequent mergers, the Middle River business evolved with its ownership by Martin Marietta (1961) and Lockheed Martin (1995). In November 1997, Lockheed Martin announced the historic Middle River factory's sale to General Electric.

While this transaction ended nearly 70 years of Martin Aviation heritage at Middle River, it opened a new chapter as a wholly owned subsidiary under GE – called Middle River Aircraft Systems. Today, the facility is part of GE Aviation's Assembly and Test Value Stream, employing more than 660 persons. It specializes in composite technology, engine nacelles, thrust reversers and aerostructures for commercial and military applications.

Over 10,000 thrust reversers for jet engines on various aircraft have been built by the business since 1970 – the year it began producing this type of system. Benefitting from the resources of GE Aviation, significant investment has been made during the past several years in tools, machinery and methods, upgrading Middle River Aircraft Systems' production and test capabilities, along with its overall competitiveness.

Among MRAS' milestones was its designation as one of two parent companies for Nexcelle, the joint venture announced in 2008 with France's Aircelle (now Safran Nacelles) to develop jet engine nacelles for new-generation integrated propulsion systems.

MRAS plays an important role in Nexcelle's two program wins: GE Aviation's Passport engine, which powers the Bombardier 7000 business jet; and the CFM International LEAP-1C powerplant for the Chinese COMAC C919 jetliner.

The fan cowl assembly's large upper and lower doors for the Bombardier 7000 business jet's nacelle system are manufactured by Middle River Aircraft Systems with composite material for lower weight.

Based on Nexcelle's work-sharing relationship, Middle River Aircraft Systems has the lead industrial role for the Passport nacelle system, and supplies such key elements as the inlet (optimized for reduced aerodynamic drag), as well as the inner barrel and large fan cowl assembly (produced with the extensive use of composites for lighter weight).

For the LEAP-1C's nacelle system, MRAS has the responsibility for components that include the integrated inlet and fan cowls, the thrust reverser's forward and aft inner fixed structure, as well as the engine mounts. The company's expertise applied on the LEAP-1C ranges from composite and metal bondments to internal acoustic treatment.

Building on the Nexcelle joint venture relationship, Middle River Aircraft Systems marked a significant win in 2011 when it was selected by Safran Nacelles to supply the thrust reverser system and engine build-up (EBU) for the LEAP-1A powerplant on Airbus' A320neo. Safran Nacelles has the nacelle system prime contractor responsibility to Airbus on the LEAP-1A-powered A320neo – a jetliner program that involves one of the aviation industry's most rapid production ramp-ups ever, placing MRAS at the forefront of this industrial endeavor.