Finally got the internal servos and pushrods finished. Check the pics below. Included is a pic of the pushrod guide that I installed in the fuselage. I used this method instead of the one shown on the Flite Test build video. The method shown on the video with the foam board keepers bends the pushrods and puts tension on them. So the servos need to work more. This method takes some strain off of the servos.
The Scout looked unfinished without a pilot figure. So I came up with a solution similar to one I used before with the FT Old Speedster. Check that post out HERE. There is a hole in the foam board that is the top of the fuselage in the cockpit. I used a couple of pieces of foam board to make a base, then cut a slot for the profile pilot head to fit in. You may or may not want to glue the pilot in permanently.
My FT Simple Scout #1 is finished. I took it out to the field for a photo shoot. Didn’t do a maiden yet. Our October club meeting is coming up next week so I wanted to make sure it was in one piece for the Show & Tell.
The Flite Test Simple Scout comes with dummy engines; a nice detail. Thought it might be a good idea to paint them to set them off a bit from the brown fuselage and black cowl. So I went with aluminum Rustoleum. The skewers that come with the kit can be used to hold the engine parts while you are painting. I used sandbags to hold the skewers in place on the table. And then the skewers can be used again to guide the parts to the exact right place on the fuselage when you hot glue them. The one picture shows the parts painted black. Bad idea. It blends in with the cowl.
I was having a hard time getting the turtle deck centered on the FT Simple Scout. Came up with this idea using some foam board scraps and painter’s low tack tape. Mark the centerlines, then it is easy to align the separate turtle deck sections while gluing. And the painter’s tape comes off easily without damaging the poster board.
An easy way to keep the front and back of the turtle deck formers square while gluing is to simply use two strips of foam board to align the former.
At the point where I am finishing the fuselage. Without the foam board top rear of the fuselage, the back end of the turtle deck has no support. You might add a cross member right where the turtle deck ends. And on the bottom of the fuselage you might cut the foam board to include the tail skid and end at the last cross member.
When you are assembling the carbon fiber pushrods and the servo arms, you may find it helpful to clamp the control surfaces so that they are perfectly flat; no up or down and no left or right.
When I built the first FT Simple Scout with the balsa diagonals, I didn’t make slots for the pushrods. The foam board fuse has slots but I thought that I could somehow maneuver the pushrods through all the open spaces between the balsa sticks. I couldn’t find a way to do it. So instead i decided to mount the servos on the outside of the fuselage and use carbon fiber tubes as pushrods.
Make some short Z-bends for each end of the carbon fiber pushrods. Make sure the piano wire is a snug fit in the tubes. Then I used thick CA to fix the Z-bends into the tubes.
If you use a Dremel tool or power saw to cut the tubes you are liable to put some cf dust in the air. You don’t want to inhale that so I use a miter box and hand saw for minimum dust.
The cardboard packing in the servos from FT can be used as a template for cutting the hole in the fuselage. Just extend the opening on each end so that the entire servo with end tabs fits through.
This model is being built as a 3 channel. If you are building the 4 channel version you need to make sure that the servo has room with full aileron down deflection.
The way that the Scout is constructed there is a second layer of foam, the doubler, that you will need to cut through.
The servo arm is in the up position. This makes the line from the servo to the control surface close to parallel to the top of the fuse.
I put the hot glue inside through the bottom of the fuselage. Little bit of a tight fit to get the glue gun nozzle in, but it is doable.
Just a short video to show the action of the external pushrods on the FT Simple Scout.