On a real calm day, while banking tightly into a 360 degree turn, I have felt/heard a sound on the belly of my Coupe, both 415C and A2-A, when crossing my own wake. Scott
--- On Tue, 1/13/09, William R. Bayne <[email protected]> wrote: From: William R. Bayne <[email protected]> Subject: Re: [ercoupe-tech] Stall warning in Ercoupe To: [email protected] Date: Tuesday, January 13, 2009, 7:29 PM 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 > > >
