Craig, With the general consensus leaning toward increasing the size of the horizontal stabiliser and in turn the control surface area I'd advise you get the concept of reducing the elevator size checked thoroughly before you decide to run with it. for 2 reasons. 1. Because the KR is so closely coupled the wings can blanket part of the horizontal at high angles of attack, the width of the elevator allows part of the control surface to protrude outside of this effect and allow controllability in these attitudes. 2. The elevator is effectively altering the airfoil and angle of attack of the horizontal stabiliser to perform it's task, too great a deflection could result in a stalling of the stabiliser with unwanted results. Please be sure to have your ideas thoroughly vetted before implementing them. Cheers. Pete Bancks. Ballina. Oz.
On 18/10/2010 10:26, Craig Williams wrote: > My Bad. I opened my big mouth without running the numbers first. Here are > the > #'s > > The tail as bought from the previous owner. H/S is 827 sq in and the elev is > 827 sq in. If I use this tail I will add 100 sq in to the HS to round the > ends. The previous builder added lead shot in the elev to add a > counterweight. > Mine will be internal so this will be removed at the ends. This would remove > 84 > sq in of the elevator. The difference between the added area to the H/S and > the > removal of the weight from the elev will effectively be a 20% change in the > ratio of the area of the H/S to the elevator area. Also my elev controls are > going to be adjustable so I can increase the throw of the elevator if I need > to. This is a small change in area and I believe the effects on controlling > the > plane will be positive. Most landing will be two wheelers with the speed > brake > deployed. Hope this helps > > Craig > www.kr2seafury.com
