---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Mon 02/20/06: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:19 AM - Elevator position in cruise (Matthew Brandes) 2. 07:13 AM - Elevator position in cruise (James H Nelson) 3. 08:47 AM - Re: Elevator position in cruise (Matthew Brandes) ________________________________ Message 1 _____________________________________ Time: 06:19:31 AM PST US From: "Matthew Brandes" Subject: RV9-List: Elevator position in cruise --> RV9-List message posted by: "Matthew Brandes" What are you flying RV-9'rs seeing for an elevator position in cruise? My counterbalance arm is sticking up may 3/4"-1" in cruise at 2500. Sure seems like a lot. Can I fix that by adding a little more shim under the HS front spar? Matthew Brandes, RV-9A - N523RV Hobbs: 15.3 Hours www.n523rv.com ________________________________ Message 2 _____________________________________ Time: 07:13:18 AM PST US Subject: RV9-List: Elevator position in cruise From: James H Nelson --> RV9-List message posted by: James H Nelson Hi Matt, First, is this in a lightly loaded situation. Or is it in a max loaded situation? If this is a lightly loaded condition, then shim stock under the tabs on the front HS spar mounts would be required. You are trying to raise the tail in the present condition so raising the front of the spar is called for. Remember that the tail is designed to provide down loading in normal flight configuration. It seems as tho you have too much down loading and your elevators are trying to reduce it by providing a lifting moment. Try several shims of say .010 to .020 thickness. Try one and go fly. Continue to adjust until you have a slight downward positioning of the control horn in a lightly loaded condition. Then, as you load the aircraft up the trim will center up the control horn on the tail and as you approach full load, the horn will be slightly displaced upward. I hope that makes sense. BTW, "coke cans" are aluminum and are thin enough to be used as shim stock. Just clean off the material so you don't have a sugar coating on anything. Prime it also. I would probably make several shims, clean and prime them and then go after the adjustments to the horiz. spar. Jim RV9-A (QB) ________________________________ Message 3 _____________________________________ Time: 08:47:29 AM PST US From: "Matthew Brandes" Subject: RV9-List: RE: Elevator position in cruise --> RV9-List message posted by: "Matthew Brandes" Jim, Yes, lightly loaded. It is me with 3/4 tanks. I'll make up a batch of shims and play with it some. Matthew Brandes, RV-9A - N523RV #90569 www.n523rv.com