There are many ways to install a spoiler in wings. Most that I have use 1" trailing edge stock you pick up at a hobby shop. You need enough to cover a span about 3 or 4 ribs worth. I like my spoilers to stand up 90 deg. To get this you need to put a 1/4" X 1/4" peace of balsa behind the spar. This will let the control arm,( that is under the spoiler blade ) extend forward of the pivot point. This will give you the leverage needed to pull back on to make the 90 deg. If you don't do this, it won't come up 90. Maybe 75 deg. Use a good hinge tape, 3/4" is good if you can find it, if not 1" will do. Let's see, we have the spoiler blade ( edge stock ) with the thick side up against the 1/4",the ribs notched out so it lay's on top of the ribs and is taking the same shape that the ribs were. The ends of the spoiler should end up on the inside of a rib. You can glue a little balsa to the side of the rib for the blade to rest on when the spoiler is close. I like to put some balsa between two ribs to give me some support for the tube to be glued on. The tube must line up with the control arm on the blade. The rest of the tube must make a gentle bend and pass through the ribs un till it gets to the center of the wing. You now have to make a choice. Are you going to put a servo in the wing or mount it in the fuse. Bolt on wings can go ether way. You put the servo in the fuse forward of the wing with a long control arm. Take a brass spacer that fits in a servo grommet and put the flat part up and put a servo mounting screw through it into the end of a control arm. You may have to cut off a little of the screw that goes through the control arm to clear movement. Now take the string and tie a loop just big enough to clear the brass on the servo arm. Thread the string through the tube and it should line up with the control arm on the spoiler blade. When the servo arm moves forward, it will pull the control arm on the spoiler blade and up it comes. You can mount the servo in the wing. I like this the best. If the wing pop's off on a hard landing, and you lose your rubber bands. The wing just unplugs itself from your servo extension plug in the fuse's. Mount the servo on it's side next to the center rib as close to the spar as possible. Route the tubes so that they line up with the servo arm. One tube will be longer from the other half of the wing, because the servo will be on one side of center rib. Here is a neat tip for the control arm on the spoiler blade: Use a peace of brass tubing. (Small enough so only the string and a round tooth pick won't quite fit in together) Bend the top 1/3 of it to the right 90 de (or left)and the bottom 1/3 of it straight up at you, 90 de. This part that you just bent toward you, is the control arm that the string will go into from the tube that goes to the servo. Epoxy the rest of the brass to the bottom of the spoiler with the part that you bent towards you at the hinges line. Don't let epoxy get in the tube. With the spoiler on the wing and string going through the brass tube, push the brass tube towards the spar. This will give you that 90 deg I told you about. The tooth pick is used to wedge the string in and make it tight. This gives you the ability to make fine adjustments. Now do this to the other half of the wing and if you really want control do top and bottom spoilers. There is still things that need to be done. You need to make the spoiler blade return when not being deployed. You can put a lead weight on the trailing edge to make it drop down. You can put some kind of hook on the spar and another one on the blade and put a rubber band on it to pull it closed. But my favorite is using a peace of music wire and 2 small pieces of brass tubing, along with a longer peace of brass tubing. Cut off a peace of brass tubing that will go from one end of the spoiler bay to 1" past the control arm on bottom of spoiler blade. This tube will be epoxied to the 1/4" balsa right below the hinge line. You need to relieve part of the balsa to make it a clean job. But before you epoxy it in, you need to put the music wire in it and cut off so that you have 1" sticking out both ends of the brass tube. Bend the wire over 90 deg both ends in the same direction. Cut off a peace of brass tubing and epoxy it to one end on the spoiler bay on the rib, up and down, parallel to the spar going vertically. One end of the music wire will go into this tube. You can now epoxy the long tube on the 1/4 balsa just below the hinge line. Put the spoiler blade in place and line up the music wire that is now hanging down. Mark that spot on the blade. Take a peace of brass tubing just a little less then 1" and epoxy it to the bottom of the blade. Pull that music wire towards you and slide the brass tube that on the blade on it. The tension of the music wire will close the blade when the servo in relaxed. The music wire will slide inside the tube as the spoiler is raised One more thing. At the trailing edge of the spoiler bay you need to notch out the ribs to put a sub spar on the wing. This will give something to stick Monocoat on. Please make the sub spar go all the way out as far as you can. If you don't you can have problems. On a hard landing the Monocoat will split from the spoiler bay outwards. Now class, that wasn't hard? Now was it. --- Larry Taylor --- [EMAIL PROTECTED] --- EarthLink: It's your Internet. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
