Ok Kevin,
I've heard it (now). ;<)
Let's re-pose the question:
Does anyone with credibility beyond having human shape possess or
have access to the slightest "evidence" that:
1. Early Ercoupe belly skins flutter (audible oil canning) at minimum
speed
with full back elevator (the proverbial "full stall" landing, or as
close as one
can get in a coupe...would have no meaningful use in a "whip stall")?
2. Belly skin stiffeners were added to prevent the above, as opposed to
preventing the possibility of skin failure from "oil canning" in other
modes of
flight?
3. An airframe identifiable by N# or Serial # with unreinforced belly
skins
can demonstrate the suggested "effect"?
4. Fred Weick ever suggested such an intentional hypothesis?
The Ercoupe DOES NOT STALL (in the normal sense) therefore the whole
idea is preposterous! Of what possible use is a "stall warning device"
in an
aircraft design incapable of the traditional stall?
In flight with full back elevator and minimum power (the RAPID DESCENT
mode some believe the dark side of coupe behavior), the only sound is
teeth chattering or knees knocking of passengers unacquainted with this
part of the flight envelope.
The pilot IS obligated to convert much of the impressive rate of
possible
vertical descent (that's not a bug, that's a feature!) to forward motion
WITHOUT AUDIBLE WARNING before ground contact otherwise the
"arrival" may force the wheels up through the wings, the control column
up
through the fuselage tank and result in spinal compression damage.
I found this ability to lose excess altitude with complete control
without flaps
or slips impressive and useful. Entry into and exit from it this "mode
of flight"
are as simple and predictable as "normal" climb and "Normal"descent once
the technique is learned and the skill maintained.
Best regards,
William R. Bayne
.____|-(o)-|____.
(Copyright 2009)
--
On Jan 13, 2009, at 14:50, kgassert wrote:
Has anyone heard that the belly of the Ercoupe was purposely designed
to flutter and make noise as a stall warning device? And that people
over the years have put stiffeners in this area to make it stop in the
believe that it was a design and in doing so disabled the stall
warning?
Kevin1
------------------------------------
Yahoo! Groups Links
