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- Newsgroups: rec.aviation.misc
- Path: sparky!uunet!caen!dlevy
- From: dlevy@viper.engin.umich.edu (David W Levy)
- Subject: Re: Exceed Vne or max G's first?
- Message-ID: <_2F=_L+@engin.umich.edu>
- Date: Wed, 18 Nov 92 09:17:15 EST
- Organization: University of Michigan Aerospace Engineering, Ann Arbor, MI
- References: <9211171327.AA03697@tecnet1.jcte.jcs.mil> <1eb5psINNn30@bHARs12c.bnr.co.uk>
- Originator: dlevy@viper.engin.umich.edu
- Nntp-Posting-Host: viper.engin.umich.edu
- Lines: 21
-
-
- In article <1eb5psINNn30@bHARs12c.bnr.co.uk>, gbb@bnr.co.uk (Geoff Brown) writes:
- > Lars-Henrik Eriksson >
- > One of the factors determining Vne is that the airframe must be able to
- > take a certain amount of turbulence (measured as change in vertical wind
- > speed) without being overstressed.
- >
- > davehyde@tecnet1.jcte.jcs.mil >
- > Didn't know that. I thought that's what maneuvering speed (or pentration
- > speed, or Vgust, or something like that) was.
- >
- >
- > Vgust is the speed at which the loading which causes the wing to stall is
- > the same as the maximum loading. ie it is impossible to overstress the
- > aircraft.
- >
- All aircraft must be designed to withstand loads due to gusts up to certain
- speeds. For example, below 20,000 feet altitude, the airplane must withstand
- a gust of 50 ft/sec up to the "structural cruising speed," which is at the
- top of the green arc on the airspeed indicator. A gust of 25 ft/sec
- is used up to VD.
-