Hush kit

March 15, 2007 - 7:39am

Few sounds are louder than a jet aircraft at takeoff.

The decibel level of a climbing jet engine at full power can be higher (140 dB) than that of a chain saw (110 dB) or ambulance siren (120 dB), according to the National Institute for Occupational Safety and Health.

But relief may be a toggle away, if recent university research finds its way into aircraft cockpits.

January 29, 2007 - 9:37am

When is a Gulfstream II or III not a Stage 2 aircraft? When it gets a Stage 3 hush kit. Last month, Miami-based Quiet Technology Aerospace delivered its 11th converted Gulfstream since its Stage 3 hush kit received certification a year ago this month. The latest two airplanes were GIIIs owned by charter operator C&S Aviation of Dallas.

January 29, 2007 - 5:06am

All subsonic jet and transport-category airplanes (those with an mtow of 12,500 pounds or more) for which application of a new type design is submitted on or after Jan. 1, 2006, will have to meet new noise certification levels, under a long-expected notice of proposed rule making (NPRM) published December 1.

December 13, 2006 - 11:29am

A new Pratt & Whitney noise-reduction kit will permit operators of McDonnell Douglas MD-80 twinjets to meet Chapter 4 International Civil Aviation Organization noise rules that are scheduled for introduction in six months’ time. The heavyweight version of the equipment comprises an improved fan-inlet liner, a 16-lobe exhaust mixer, a muffler and a tabbed nozzle.

December 6, 2006 - 9:31am

Stage III Technologies, which 18 months ago received an STC for its Stage 3 hush kit/cascade thrust reverser for Gulfstream IIs and IIIs, plans to have its long-awaited first installation under way in February at Western Jet in Van Nuys, Calif.

October 20, 2006 - 9:37am

Quiet Technology Aerospace (QTA) continues to install Gulfstream II and III Stage 3 hush kits at the rate of about one per month since being certified. The Opa Locka, Fla., company received an STC for the hush kit in January 2003 and expected to deliver its 20th completed aircraft last month.

October 11, 2006 - 5:05am

Stage III Technologies of La Jolla, Calif., last monthreceived final FAA certification of its FAR Part 36 Stage 3 noise kit/thrust reverser for the Gulfstream II/III. Thecompany, which claims its hush kit reduces overall noise to the 70- to 73-dBA level (depending on aircraft model), is seeking orders for installations to begin this summer. The first four kits are priced at $1.5 million.

October 9, 2006 - 12:32pm

After some six years of development, Stage III Technologies is ready to start installing its FAR Part 36 Stage 3 combined hush kit/thrust reverser for the Gulfstream II, IIB and III. The La Jolla, Calif.-based company received FAA certification of the hush kit in November and an STC for the complete hush kit/reverser system in mid-May.

September 26, 2006 - 12:38pm

Some 40 Gulfstream IIs and IIIs have been equipped with Quiet Technology Aerospace’s Stage 3 hush kit. The Opa Locka, Fla. company said GIIs and GIIIs equipped with its hush kit “can access any airport [in Europe, Asia and the U.S.] that a GIV/G450 can.”

 
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