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Aeronautical Engineering/re: Aileron Flutter in Grob Twin 2 Sailplane
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Question
Hi, our ailerons show flutter at airspeed well below VNE (135kts). Have stripped, re-faired and rebalanced weights and moments (within spec) to little effect. Is the next step to 100% mass balance them? Have removed all free-play in control circuits, aircraft is up-to-date with all AD's.
Regards,
Andy Mackay
RZAF Aviation Sports Club - Gliding
www.ascgliding.org
Sorry Andy, I have never worked on flutter. I assume that once the ailerons are balanced and aerodynamically clean, you need some damping and stiffness in the control system. How to do that is not obvious, but I bet many people have faced this problem. Check the NASA archives.
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| Rating(1-10) | Knowledgeability = 7 | Clarity of Response = 8 | Politeness = 10 |
| Comment | thanks Paul - will continue by following up Burkhart Grob and see if they can recommend a fix, cheers, andy | ||
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Aeronautical Engineering
Answers by Expert:
Paul Soderman
Expertise
Aeronautics, Fluid Mechanics, Aeroacoustics, Noise Control, Muffler Design, Wind Tunnel Research.... I know nothing about India - do not ask about schools, jobs, application requirements, career choices, etc. for India. Please, no text message verbiage; I prefer full words in full sentences. Thanks.
Experience
38 years as research engineer at NASA
Publications
AIAA, NASA
Education/Credentials
B.S. and M.S. Aeronautical Engineering - U. of Washington
Graduate work Standford U.
Awards and Honors
AIAA Associate Fellow (American Institute of Aeronautics and Astronautics)
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