 CFI oral intel
Michael Ash <mike@mikeash.com> wrote in
news:1212572312.616709@web1.segnet.com:
> In rec.aviation.student Gezellig <geezellig@> wrote:
>> Michael Ash pretended :
>>> In rec.aviation.student Gezellig <nokonihi@> wrote:
>>>> On Fri, 30 May 2008 01:20:04 -0500, Michael Ash wrote:
>>>>
>>>>> Joking aside, if your straps were loose enough that you could
>>>>> slump forward, that *would* affect your CG which would in turn
>>>>> affect your trimmed airspeed.
>>>>>
>>>>> There's another issue that I just thought of that I don't think
>>>>> anyone has mentioned yet, though. Won't you get into a graveyard
>>>>> (bad terminology for this scenario, as you're already dead)
>>>>> spiral? After all, if you could stay straight and level just by
>>>>> taking your hands off the controls you wouldn't need to fear IMC
>>>>> with no gyroscopic instruments. So it seems that if you start high
>>>>> enough, the correct answer to this question would be whatever the
>>>>> terminal velocity of your fuselage is without its wings. Am I
>>>>> off base here?
>>>>
>>>> You fly until gassless, stall, nose down, then descend too rapidly,
>>>> striking the ground with the wings ripped off. Works for me.
>>
>>> You don't stall, because when the engine quits the airplane will
>>> start to descend, maintaining approximately the original airspeed.
>>
>> At what point do you expect to lose the wings via "the correct answer
>> to this question would be whatever the terminal velocity of your
>> fuselage is without its wings."?
>
> If you enter a spiral dive as I surmised, the wings fall off either
> when you exceed Vne or when you exceed the maximum loading the wings
> can support, whichever comes first. However it would seem that whether
> this happens or not will depend on the airplane in question.
Well, the wings won't come off as you exceed VNE. You have a good 10% on
top of that before anything will happen.
Something nasty will at the load limit, though. Not the published one,
of course, but at 50% over that. At the published load limit you are
guarunteed that the airplane will not permanently deform. 50% over that
you're guaunteed it will remain in one piece. Over that you're on your
own. It;s not quite as tidy as all that, though and with most light
planes it's probably flutter that's going to pull it apart and that will
probably be brought on by a combination of load and speed. This is not
to say it's safe to operate at or near the red line or load limit.
It isn't.
Bertie
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