Zitat:
Eine gesteuerte Rolle ist auch der Boeing-Testpilot beim Vorführen der damals neuen 707 geflogen.....
Ich habe oben von den gesteuerten Rollen gesprochen. Die Boeing 707 ist aber mit Sicherheit eine Querruderrolle geflogen, was auch eine geringere Belastung als die gesteuerte Rolle verursacht.
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@andragar
Hallo Michael,
zu diesem Thema habe ich folgende Informationen:
As the big plane bore down on the race course, Johnston pulled back on the yoke and the aircraft entered a gentle climbing turn. The turn steepened dramatically, and it became apparent to the cheering masses that they were about to witness something extraordinary. With the bank angle now exceeding 90-degress, the aircraft arced through a graceful and fully-controlled barrel roll, reaching the inverted position at approx. 1,500 ft. Returning to level flight, Tex pulled up into a perfect Chandelle, reversed direction, and headed back to the lake for the other half of his routine. Repeating his astonishing performance, he rolled the airplane a second time....
Quelle: Wayne Peterson, Zeitschrift WINGS April 2004 Seite 21
The barrel roll is a precise maneuver in which the airplane is rolled around an imaginary point at 45° to the original flight path. A positive-g level is maintained throughout the maneuver, and the ball in the turn and slip or turn coordinator stays in the middle...... it's a precise maneuver requiring particular airplane attitudes at particular reference points, and it can be difficult to do properly at first....This maneuver can be considered an exaggeration of the wingover, only instead of starting to shallow the bank at the 90° position the pilot must steepen it continually until the airplane has rolled 360° and is back on the original heading at the completion of the maneuver. ...... The roll and turn are continued until the airplane is headed in the original direction with the wings level......From behind this maneuver looks as though the airplane is being flown around the outside of a barrel.
Quelle: William K. Kershner: The Basic Aerobatic Manual. Ames:Iowa State University Pres, 1991 ISBN 0-8138-0063-3
"On August 7, 1955, Alvin M. "Tex" Johnston stuns the crowd at the Seafair Gold Cup hydroplane race on Lake Washington by barrel (or aileron) rolling the prototype Dash-80, the precursor to the Boeing 707, thus launching the era of the modern commercial jet. (What Johnston did with the airplane was called a barrel-roll but some consider it an aileron roll in which a plane rotates on its long axis, rather than describing a "barrel" loop. However, unlike a conventional aileron, or snap, roll, Johnston maintained positive gravity through the maneuver.)"
Sources:
Robert McG. Thomas Jr., "Tex Johnston, Daring Jet Test Pilot, Dies at 84," The New York Times, November 14, 1998, A16; Robert Douglas, "Pioneers in Aviation" video (Aiolos Productions, Ltd., 2001. Note: The designation of Johnston's maneuver as a barrel or aileron roll remains a souce of ongoing discussion among pilots and engineers. To lay observers of the film record, it looks like a little of each.
Quelle: Hsitory link.org The Online Enyclopeia of Washington State University
http://www.historylink.org/_output.CFM?file_ID=390
Externe Video-Aufnahme (22MB)
http://www.alexisparkinn.com/photoga...707%20Roll.mpg
Link aus einem Forumsbeitrag [Flightgear-users] The Famous 707 Barrel Roll
http://baron.flightgear.org/pipermai...er/006632.html
Gruß
Carl