Subject: Extended PSRU
From: ACRE
Date: 7/17/2003, 7:44 PM


Paul Lamar wrote:

No.. no Rick you got it wrong. Cessnas have effective flaps that lower
the landing
and crash speeds as God and Cessna intended. That is the reason for
the trim.

You can't put flaps on a canard main wing as there is no, non, nada
pitch authority.

I don't want to get in the middle of this canard versus non-canard
pissing match, but I believe that the Beechcraft Starship (a
cabin-class twin turbo prop pusher canard) had flaps on the main wing.

Russell Kent

It also had a variable sweep back canard that moved the center of canard
lift
forward and back depending on the deployment of the main wing flaps.

Paul Lamar


>From what I've read the Starship flaps increase the wing area but not the
camber. According to a quote from one pilot they are not particularly
effective.

You can't afford to have the rear surface stall first, so using [truly]
effective flaps on a canard would require some extremely fancy forward
surface changing.

Mind you, this doesn't have a hell of a lot to do with an extended PSRU....
;)

Martin Morgan


 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.