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In-flight refreshment.

Business jets from Bombardier Aerospace and Embraer have received FAA certification for new lavatory water systems from Adams Rite Aerospace Inc. of Fullerton, Calif. According to Adams Rite's regional sales manager, Dan Scandalito, the sys tern saves weight over older systems that rely on engine bleed air to pressurize a central potable-water tank.

The typical business jet's forward and aft lavatories and galley all require potable water. Traditional bleed-air designs pipe that water out to the three areas from one tank. An aircraft on the ground without engine power relies on an auxiliary power unit to drive a compressor for delivering the propulsive air.

The new system eliminates a lengthy piping run and the compressor, Scandalito said. The 15-pound assembly, which consists of a pump, heater, manifold, drain valve, and electronics, attaches to an aluminum plate 12 inches wide by 18 inches high. That plate, in turn, mounts near the poet of use. It supplies the galley or lavatory faucets from a small reservoir situated nearby rather than from a 30-gallon tank that's typically located back by the baggage compartment.

In addition to weight savings, the Adams Rite system offers "watchdog circuitry," Scandalito said. The system can monitor itself for leaks and shut off the water after a preset running time elapses.

Also, the system's modularity eliminates a last plumbing step at final assembly. Bleed-air systems require that pipes, lavatories, and galleys all come together as the cabin interior and fuselage join up. With the Adams Rite system, that step is made during interior assembly.

The Bombardier Challenger 300, an eight-passenger midsize business jet, completed its first flight in August 2001 and entered service this past January with the new lavatory water system on board, according to a company spokeswoman.

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Title Annotation:Fluid Handling And Fluid Power; Adams Rite Aerospace Inc. water systems
Author:Sharke, Paul
Publication:Mechanical Engineering-CIME
Article Type:Brief Article
Geographic Code:1USA
Date:Apr 1, 2004
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