For some reason, I'm having difficulty sending to RCSE now. This is the second msg that hasn't shown up...
----- Original Message ----- From: "Joe & Jan Wurts" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, October 31, 2003 8:07 PM Subject: Re: [RCSE] Crow?? > I used to use a method somewhat like this. This works quite > nicely for optimizing the aircraft energy and "float". The challenge > that I could not overcome was in the roll/yaw coupling that one > gets with intermediate flap stickpositions. For me, getting the roll > response to be pure is very important. That is, I want the > plane to output a near pure roll in a clean manner, or even better, > a slightly proverse yaw with a roll input. And, I > have found that I want this to happen independent of where > the flap stick is. So, I use just a little bit of up aileron in my > glide path mix. The amount depends on the airplane. > > For times when I want the absolute slowest landing speed > potential, I might dial in a bit of camber before beginning my > approach. This effectively gets a set-up that isn't too far from > Dr. Drelas solution. > > Joe > > ----- Original Message ----- > From: "Mark Drela" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, October 31, 2003 7:02 PM > Subject: Re: [RCSE] Crow?? > > > > > > I have my ailerons go down for the first half > > of the throttle stick travel, but not as fast > > as the flaps. For the second half of the stick travel, > > the flap keeps going down, while the ailerons > > go back up. > > > > throttle_stick flaps ailerons > > -------------- ----- -------- > > (forward) 0 0 max L/D > > (middle) +25 +10 min flight speed > > (back) +50 -6 max sink speed > > > > > > I do most of the approach with the stick near the middle. > > Biasing it forward and back a bit then powerfully controls > > the energy dump rate (glide slope), without much effect > > on the speed or stall margin. > > > > > > > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" > and "unsubscribe" requests to [EMAIL PROTECTED] Please note that > subscribe and unsubscribe messages must be sent in text only format with > MIME turned off. > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
