Maintenance and Modifications
Hush kits for GII/III resurrected as QS3
Hubbard Aviation Technologies of St.

Hubbard Aviation Technologies of St. Paul, Minn., last week signed a contract with Aeroshear Aviation Services of Van Nuys, Calif., to fabricate and install engine hush kits for the Rolls-Royce Spey 511-8 engines powering Gulfstream GIIs and GIIIs. Called the QS3, “for quiet Spey engines,” according to Stanley Hubbard, CEO of Hubbard Aviation Technologies and Hubbard Broadcasting, the kits are priced at $2.4 million (installed).

Hubbard Aviation Technologies is showing the first production example of the QS3 Hushkit installed on Hubbard Broadcasting’s 1967 GII (N20H) at the NBAA aircraft static display at Orlando Executive Airport. Bernie Weiss, president of Hubbard Aviation Technologies, estimates that the potential market for Spey hush kits comprises some 330 to 380 GIIs, GIISPs, GIIBs and GIIIs.

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