Re: Ferrari's "third damper"

News wrote:


Phil Newnham wrote:
Well then my definition of flutter isn't the same as yours - if the wings on an F1 car really suffered from flutter they'd last about 5 minutes. As I saw it, the job of the TMD was to kill a vibrational frequency that was being input by the tyres under certain loading conditions - I understood that, like any other part of the suspension, its job was to keep the wheels in contact with the ground as much as possible, and that the aerodynamic effect was small and secondary - I'm not persuaded that there are significant gains to be had by reducing the vibration of the wings with a TMD - surely it would be much easier to simply design the wing not to respond to the frequency in question.



Aero-flutter is distinct from what I termed "suspension movement-induced aero surface flutter", i.e. externally excited, not aero loads.

Poh-tay-toes, poh-tah-toes :p. FWIW I would consider flutter as referring to a reinforcing combination of two modes of vibration, one around the root, the other around the spar, however forced. Although I know you didn't mean that my engineering pedant still wishes to point that out ;)

I take your point on the likelihood that keeping the wheels in contact over the kerbing may have been the primary purpose.

And if so, still not clear why they should have been banned.

They were banned because the FIA didn't like them.

--
Phil

http://www.flickr.com/photos/tmc1979/
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Relevant Pages

  • Re: Ferraris "third damper"
    ... Phil Newnham wrote: ... As I saw it, the job of the TMD was to kill a vibrational frequency that was being input by the tyres under certain loading conditions - I understood that, like any other part of the suspension, its job was to keep the wheels in contact with the ground as much as possible, and that the aerodynamic effect was small and secondary - I'm not persuaded that there are significant gains to be had by reducing the vibration of the wings with a TMD - surely it would be much easier to simply design the wing not to respond to the frequency in question. ... Aero-flutter is distinct from what I termed "suspension movement-induced aero surface flutter", i.e. externally excited, not aero loads. ...
    (rec.autos.sport.f1)
  • Re: Ferraris "third damper"
    ... wings on an F1 car really suffered from flutter they'd last about 5 ... the job of the TMD was to kill a vibrational ... aero surface flutter", i.e. externally excited, not aero loads. ...
    (rec.autos.sport.f1)
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