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On Nov 25, 2004, at 12:27 AM, Dan Hall wrote:

>
> I'd very be interested to hear the experts comment on the power off & 
> power
> on stall & potential spin charactoristics of a C/D converted to a D 
> with an
> O-200 at gross weight of 1400 lbs, with13 degrees up elevator.

Hi Dan,

Your hypothetical coupe can not be a TC 787 D with 13º up elevator.  It 
would be a TC 718 CD, limited to 1260 lbs. gross.

That said, a 2-control coupe with 13º up at 1400 lbs. within CG limits 
IS incapable of spinning.  The D demonstrated that
to the CAA for "approval" for production with 9º up elevator.  The D 
Model is SAFER to fly in the overall at 1400 lbs. (or ANY
lower weight) with 13º up elevator it is with 9º up, but safety or 
logical considerations don't necessarily influence bureaucratic
regulation of "interstate commerce".  An 0-200 changes nothing so long 
as the CG remains within D Model spec.
>
> Has anyone done any testing, or tried this first hand??

See preceding
>
> The best glide speed at gross in my 415 D seems to be about 80 MPH.
> Anything below 75 MPH increases the sink rate drammatically with power 
> off.

What is your power-off glide speed with full nose-high trim at 1400 
lbs.?
What is your sink in fpm at 70, 75 and 80 mph at 1400 lbs.?
These can vary significantly with CG and how the plane is rigged.

Regards,

  William R. Bayne
<____|-(o)-|____>
  (Copyright 2004)
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