Boundary Layer Research, the Everett, Wash. company that developed winglets for the Beech Duke some 10 years ago, is now designing winglets for King Air 200s and 300s. A prototype has been flying since late last summer. An announcement sent in December to King Air operators to gauge their interest in such a modification garnered an “overwhelming” response, claimed company president Bob Desroche.
MITSUBISHI MU-2B-35, HILTON HEAD, S.C., AUG. 1, 2001–The NTSB determined that the probable cause of the accident was the improper maintenance/installation and inadequate inspection of the airplane’s flap torque-tube joints during routine maintenance by company maintenance personnel.
A new control surface could reduce induced drag on commercial and business aircraft by up to 14 percent, resulting in fuel savings of more than $400 million per year across the entire U.S. air transport fleet. So claims Utah State University aeronautical engineering professor Warren Phillips, who recently introduced the devices, which he calls “twisterons.”
Cessna announced today that it is partnering with Winglet Technology of Wichita to offer the company’s patented elliptical winglets as a retrofit later this year for in-service Citation Xs. Though flight testing won’t begin until later this summer, Winglet Technology president Bob Kiser told AIN the design has been shown to “significantly improve performance” on hot days at higher elevations.
The Australian Transport Safety Bureau (ATSB) listed it as merely a serious incident but considered it significant enough to issue a full report. The incident involved the loss of control a Saab 340 experienced when it encountered icing. There were no injuries and no damage to the aircraft, but the pilots did not recover from the loss of control until the aircraft was only 112 feet above the ground.
In the year before April 26, 2003, when Sino Swearingen’s number-one SJ30-2 prototype crashed after entering an uncommanded and unrecoverable right roll during high-speed flutter testing, company engineers were attempting to deal with lateral stability issues with the twinjet, according to the NTSB’s recently released factual report on the accident.
Performing intentional stalls at too low an altitude and the flight instructor’s “inadequate supervision” were blamed by the NTSB for the crash on September 20 last year of a Hawker 700 operated by Starflite Management of Houston near Beaumont, Texas. Two pilots, both preparing for a Part 135 competency check, and the instructor were killed.
Boundary Layer Research, the Everett, Wash. company that developed winglets for the Beech Duke 10 years ago, is now designing winglets for King Air 200s and 300s. A prototype has been flying since late last summer and an announcement to King Air operators in December garnered an “overwhelming” response, claimed company president Bob Desroche. He said winglets will improve speed, handling and fuel economy.
Beech King Air A90, Pensacola, Fla., Aug. 17, 2004–After the right engine quit, Eclipse Enterprise King Air N45TT crashed while returning to land at Ferguson Airport, Pensacola. VMC prevailed and no flight plan was filed. The commercial-rated pilot and one passenger received minor injuries, and the airplane incurred substantial damage. The pilot thought the cause was fuel exhaustion, because he knew the airplane was low on fuel.
In the January issue of AIN (page 39), we recounted the origins of the Learjet, complete with references to the well worn tale of the Swiss fighter connection. We then heard from Bill Lear’s eldest son, who suggested that “since you can’t get it straight from the horse’s mouth, here it is from the horse’s offspring, who followed closely in the horse’s hoofsteps!”