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revdjd
Joined: 04 Jan 2007
Posts: 3
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 Posted: Tue Jan 30, 2007 2:50 pm Post subject: Wing Flutter |
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Bill:
I don't claim to be an expert on the subject but I do have 22 years of military flying with much of it as a flight engineer on medium transports. I think what you experienced was severe vortexing over the wing tips due to the hot air below the wing caused by the power plant opposed to the relatively cool air above. The extreme vortexing phenomena produced a "hammering effect" on the top of the wing causing it to flutter. I've experienced similar situations during descent and final approach during extremely hot days while flying with the Corps of Engineers in Saudi Arabia.
James D. Webber GS-11
Senior Training Specialist
Department of Attack Helicopter Training
jim.webber(at)eustis.army.mil
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jrfulp(at)ncia.net
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| Posted: Tue Jan 30, 2007 4:38 pm Post subject: Wing Flutter |
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You were in the wrong place/wrong time...the warm/cold air set-up a perfect
(bad) wing frequency harmonic...instead of diving you should have pulled
UP...slow...get your bearings...diving to 170MPH?? You should be ????
Glad your OK
John
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japhillipsga(at)aol.com
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| Posted: Wed Jan 31, 2007 7:46 am Post subject: Wing Flutter |
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John, the difference from 142 mph to 170 is 28 mph. How many seconds would your XL at or near gross require to pick up 28 mph in a dive ? I've had my XL to 180ish in a smooth shallow dive amd she seemed to handle well and I'm sure 20 % more would be pushing too far, Best regards, Bill
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