Just discovered a model called the Jupiter Duck. Free plans are available HERE for download. Went to Kinko’s and had a set of the plans blown up to 200%. Then I stumbled across this one. More on the Jupiter Duck in future posts. In the mean time watch this video. Slowest flying R/C model I have ever seen!
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.
This video shows how the combo of internal pushrods and the slot in the stick fuselage work. At first the slot seemed a bit on the long side, but it turned out to be just about right.
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 main point of this post is to show an optional way to mount motors that allows you to adjust down and right thrust. This may be needed to improve flight characteristics of some models. In this example I made a new firewall from aircraft plywood.
These are two ways to mount the motor on the firewall. The FT motors come with an X-Mount that can be set vertical or diagonal. The motors come with tiny wood screws and the firewalls have pre-drilled holes for the wood screws. Over time and with vibration wood screws tend to loosen up and back out resulting in a wobbly motor. For me a better way to mount the motor is to set the X-Mount on a diagonal. You’ll need to drill new holes, use blind nuts (also called T-nuts) and socket head cap screws.
The diagonal mount can be used to provide just down thrust, just right thrust, or both down and right thrust. It is a bit easier than using the vertical mount.
Looking from the front, if you put washers under the top of the mount, you get down thrust. If you put washers under the right side of the mount, you get right thrust. And if you put two washers under the upper right corner and one washer each under the upper left corner and lower right corner, you get both down and right thrust. No washers under the lower left corner. If you decided to make a firewall for the diagonal mount, you will need to relocate the hole that the motor wiring goes through. Click HERE to see what the blind nuts look like from behind the fire wall.
While I was working on the FT Speedster I was amazed to see the skewer fall out on the floor! This is the skewer that holds the back end of the power pod in place. Lucky I wasn’t flying. A couple of short pieces of tubing will hold it in place.
Here is a link to some (99) photos from this year’s Flite Fest. https://www.flickr.com/photos/safety_fast/albums/72157709881801187
So here is what the finished, installed firewall looks like on the power pod. Needed to notch the foam board a bit to make room for the blind nuts, otherwise the firewall wouldn’t lay flat against the foam board.
Finally went out to fly the FT Old Speedster for the first time. Things didn’t go well. When I went to taxi around it veered left when I gave it throttle. Then when I took off it kept wanting to climb even with several clicks of down elevator trim. The Speedster doesn’t have any down or right trim built into the motor mount. Every balsa model that I have ever built had both down and right trim. Lacking any other insights I decided to do that with the Speedster. I made a new firewall with a larger hole to pass the motor cables through. And I am going to use the X-mount and blind nuts with socket head cap screws. 4-40. To see the solution that I plan to use for down & right thrust, see a previous post here.