Maryland: Naval Institute Press, 1991. Isbn Further reading edit Crawford, Alex and Phil. Michael Hough, usmc deputy commandant for aviation, requested that Bell conduct studies into arming the BA609, potentially to act as an escort for V-22s. While this was happening, at 13:40, two more Whirlwinds were sent up to relieve the first four and two more Whirlwinds took off at 14:25; four of the eight Whirlwinds failed to return. Archived from the original on b c Thurber, Matt. Easy to Use Navigate 100 Free to Browse and Join. The Whirlwind was, in its day, faster than the Spitfire down low and, with lighter lateral control, was considered to be one of the nicest "twins" ever built From the flying viewpoint, the Whirlwind was considered magnificent. 81 Bristow Helicopters intends to order 10 or more.
Retrieved "Bell Augusta: BA609". Flying Control advised him of the dangerous condition of his undercarriage. Retrieved Croft, John (7 February 2012). 34 Whirlwind showing the new "Type B" paint scheme introduced in November 1940: while the black underside to the port wing was temporary, the sky fuselage band was a longer-lasting change. Hopes were so high for the design that it remained "top secret" for much of its development, although it had already been mentioned in the French press. "AW609 control laws initiated 'Dutch roll investigators". The Whirlwinds shot at anything in their sights, but were heavily outnumbered. Retrieved 1 November 2012. "AgustaWestland prepares for AW609 certification push". 25 The AW609 demonstrated a safe dual-engine failure in normal cruise flight on By February 2012, this had risen to 650 hours, and it was reported that 85 percent of the AW609's flight envelope had been explored. 32 Two to three AW609 aircraft will be assembled there beginning in 2017, and once production matures, a second final assembly line is being considered for Italy.