Thinking ahead to a time when I may need to retrieve the Jupiter Duck from the pond. Love the Internet. I stumbled across this airboat made from Coroplast; simple, cheap. Looks like a fun build. Here is the link to the article on R/C Universe.
Just started on my next building project. This one will be all Depron, a material that I never used before. So there will be a learning curve for me. When you find the plans on the Internet they may be in French or German. The designer is Thomas Buchwald. I have the Chrome browser on my Mac that has an option to translate web pages in another language. You may have a similar ability on your computer. The original design has about a 23″ wingspan, which is on the small side for me. So I went to Kinkos and had the plans blown up 200% which yields about a 46″ wingspan. Here are a few links to Jupiter Duck pages.
YouTube video – https://youtu.be/enZOPQGCpmQ
This one is a 4 channel version. Found some Williams Brothers Vintage Wheels on ebay to add a vintage feel. Still need to install the aileron servos, but other than that we are ready to go flying, weather permitting.
Park Pilot is the Park Flyer magazine from the AMA – Academy of Model Aeronautics. Came across an interesting article on the use of various foams for model building.
It appears that Depron is gradually becoming scarce here in the U.S. I read somewhere that Depron is still being produced but not in the form that we use as modelers. That’s the bad news. The good news is that other foam board products are becoming available. And there are some products that we have come to love that are still available if you search around.
FliteTest has a new product available called Maker Foam. It comes in two thicknesses: 3/16″ and 8.5mm. Why mix fractional and metric measurements? Good question. When you look at the prices remember that you are getting folded sheets 30″ x 40″ bifold. Maker Foam is covered with white paper unlike the water resistant product that is brown. The white paper will certainly take paint better. Once I wrote FliteTest and asked if I could purchase a kit made with white foam board instead of the brown water resistant. The answer was a polite no. Wouldn’t you like to have the choice?
Model Plane Foam offers a 6mm thick product made from extruded polystyrene foam. It’s not paper covered but they do mention it being sandable (sandpaper), so if you miss sanding with the other products and 6mm is the right thickness for your project, this may be a good choice for you. When you get to the product page you will have choices of: Grade A, Grade B, Mixed Box, and Seconds.
There are a number of sellers on ebay that offer various foam model suitable products. I just recently bought a box of 12 sheets of 6mm Depron. It came from the U.K. so the shipping cost was high. But there are U.S. sellers, some that offer free shipping. The problem that you may run into is the size of the sheets. Many are 9″ x 12″ for smaller craft projects. But if you look around and don’t mind paying a bit more for shipping, you can find some of the original Depron in sizes good for model airplanes.
Amazon offers Great Planes Pro-Formance Foam in a few different sizes; 2 & 3 mm in the 47″ lengths. From the product details: “FEATURES: Ideal for building airframes as well as landscape scenery and buildings Edges and surfaces are sandable and can be painted with water-based.”
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!
Foam board wheels are not very durable. The question is what to do about it. I came across some 1-3/4″ I.D. rubber O-rings recently and thought they might be useful to add some durability to the foam board wheels. The process begins with gluing the artwork to the foam board. There are places on the Internet where you can buy excellent art work for just a few dollars. Then cut the circles out. I used a Logan WA8001 FoamWerks Foamboard Circle Cutter available at Amazon. Glue the rubber O-rings to the wheel. Don’t forget to use the doublers behind the wheel for added strength. And you may find a Center Finder useful to find the exact place where the axle needs to go though. I bought the O-rings on ebay from Mr. O-Ring. Finally I used some rivet parts to act as a bushing inside the wheel. See my Rivets post HERE. The O-ring is 1/4″ thick so the finished wheel is 2″ diameter. Probably suitable for a smaller model such as the FT Minis. I am looking for larger O-rings or something similar. I fly from a grass field and have found that something more like a 3″ diameter wheel will allow me to taxi and get off the ground.
I needed to build a couple of the short power pods. There is a small oval hole just behind the firewall. My thought is that it is there in case you want to pass wires through to connect to the battery. Found a neat way to make the hole. Logan FoamWerks makes several products for cutting foam board. I used the medium sized hole cutter. Worked out really nice. Buy at Amazon.
The winner of the 2014 SEFF Southeast Electric Flight Festival Best New Aircraft is a model called the Giant Norman. It is a laser cut balsa and plywood traditional build with Monokote type covering and an 84″ wingspan and 12-18 lbs weight. The model was very popular at the time but the designer had many requests for a smaller version, which is how the Normal Norman was born. This one has a 49″ wingspan and is made from EPP foam. Normal is a 3 channel model but there is now a 4 channel version available called the Nifty Norman. This one appears to be a good candidate for a foam board scratch build project. The Giant Norman kit (balsa & plywood) and both the Normal Norman and Nifty Norman (EPP) kits are available at: http://lainesplanes.com/
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.