Still working on the Jupiter Duck. There are some areas of the construction where there are 2 or more layers of foam board. So it’s an old balsa builder technique; building on a building board. Normal balsa building pins are not long enough. Could bea building board of balsa, or a ceiling tile, or foam board. I came across these corsage pins on Amazon. Click HERE to visit the page.
This will be not news to the woodworkers and cabinet makers out there. You can use Forstner Bits when you want to drill a really clean hole in wood. The pic on the left below shows the BACK side of plywood that I drilled holes through. At least with me when drilling plywood I often end up with breakout on the back side; splinters of wood sticking out. Not so using these bits. The bit in the left pic is 1/4″. The other pic has a much larger bit for the purposes of illustration. The bits are available at Menard’s and Home Depot.
This is the Stanley FatMax Utility Knife model 10-481. Up until now I have been using the inexpensive, throw away, plastic knives. The ones I have use 2 buttons; one to lock the blade in position, the other to slide the blade in and out. FatMax has just one button that does both functions. And it has some weight to it. It feels substantial. Spare blades are stored inside. It just seems all around more comfortable to use.
I have been having some luck cutting the Depron foam with a hot wire instead of utility knives or xactos. So I made a poster board template from the plans, then used balsa building pins to hold the template to the Depron. I cut both fuselage sides at the same time. Seemed to work pretty good except when I pushed the foam too fast and not straight, the wire got under the template a bit so that it wasn’t really a square cut. Next time I think that I’ll cut one side at a time.
Now I just need the middle.
After I glued the horizontal & vertical stabilizers together I realized that it was a flimsy arrangement. The vertical stab is nearly 12″ tall with no other means of support other than the glue joint. I saw a few YouTube videos of other 200% Jupiter Ducks that had struts on both the tail surfaces and wing tips. So i came up with this way of adding struts to the tail. Used coffee stirrers and BBQ skewers. The large black triangles pictured hold the vertical stab at right angles to the horizontal stab while the glue dries. How did it work? Way better!
Two Krylon products came in handy for painting the tail feathers of the Jupiter Duck. Easy Tack allows you to make a painting mask, use it, the remove it easily. You don’t want to make a permanent bond. Then for painting I used another Krylon product called Short Cuts paint. Seemed to work well on Depron. I used white craft paper for the mask. And when drawing the mask I just moved the poster board templates around and traced it again.
It’s always a good idea to plan ahead. Just in case we have an FAA worst case scenario, which means you need to get out of the model airplane / drone hobby, what next? R/C boats and cars come to mind. Here is an interesting video on how to build a simple, inexpensive airboat.
Many people are saying that the new FAA rules regarding UAS has the potential to destroy the hobby. Below is a link to a well written article in Ars Technica that explains the situation. Also a link to a site named Drone Enthusiast. The link is to an article they published about R/C airboats. No proposed FAA regulations on R/C airboats. Yet. If a drone enthusiast site is doing articles about air boats, you have to wonder where things may be headed.
Took a trip to a local Hobby Lobby the other day to buy another few cans of Krylon ShortCuts spray paint. It seems to work well on Depron. As I was walking up and down the aisles I came across a section with a variety of wooden boxes and containers. One caught my eye. Looked just like a box that you would take to the flying field with your transmitter, batteries, and donuts. It’s about 16″ long and 7″ wide; all wood. Nice box. Stapled together. Also bought some styrofoam sheets that I came across. I feel like I have an R/C Airboat in my future. Scratch build. There are a lot of YouTube videos out there on how to build one. Also bought some craft foam spray primer. Didn’t know there was such a thing. And gesso. Used to use gesso to prime raw canvas in art school. It also works on wood and some other materials. I have some wooden paint stirrers that I may use for the motor mount on the airboat. The gesso will come in handy to prime the wood.