The reason it is called an aerodynamic balance is that area is added forward od the hinge line and as the elevator is delflected up the area forward of the hingeline reduces the load required to deflect the elevator This is used on large aircraft to reduce the control forces bu is no needed on the small KR aircraft, however this does make it easy to add weights in this area to balance the control surface to avoid flutter at high speeds. Adding area to the horizontal tail will increase the tail volumn ccoefficient just as moving the tail aft also will. However, if the area is added to the elevator it will increase the elevator effectiveness as well and make the pitch more sensetive,whereas adding the area to the stabilzer will make the aircraft more stale. Look at Troy Petteways KR2 after he rebuilt it. go to http://www....@wanttaja.com/ he has everything but pick #2 aircraft then the tr\hree link chain and you will have jillions of aircraft sites the go to maklangford's site on KR2's go down to the completed KR's and pick Troy Petteway's KR2 this will be photo's before the accident, but if you go to the end he will have another site to go to for the aicraft after the rebuild, "new wing, new engine and modified tail" to make the aircraft more stable. This is http://www.hiwaay.net/~langford/troy
Sincerely Jim . On Mon, 11 Oct 2004 09:09:54 EDT ifly...@aol.com writes: > I have the new airgoil stab on my KR2S and also incorporated 4" wide > > aerodynamic balances that go up to the front spar of the Horizontal. > The main > reason I believe they are called aerodynamic balances is because the > couterweight > for the balancing of the control surface is in the airstream not in > the > fuselage. I seriously doubt there is much aerodynamic help as far > as the "feel" > of the control. I cannot prove this of course but I can attest to > the fact > the the KR2S is much more stable than the KR2. As Mark Landford > and a couple > of the others who flew mine. The pitch is sensitive at high speeds > but it > requires a considerable amout of force to displace the stick from > it natural > center. What I mean by this is that the stick will stay put , you > can let go > and the plane stays rock solid, moving to stick takes some > pressure but very > little movement is required for a large pitch change. Then plane > flies best > when you let go of the stick sometimes. Maybe the aerodynamic > balances help > in this centering affect - im not sure. The main reason I > installed my > elevatore this way was just for the easy of installing weight to > balance and it > looks cool! I didnt wan a bunch of weight inside the fuse on an > arm I could not > have access to. The weight is now permanent and I dont worry about > it. > Just make a descision that works... build it once and move on... > Flying time is > here! > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > >
