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.
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.
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.
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.
My first FliteTest build is an Old Speedster. I bought the speed build kit. The top half of the fuselage is white poster board. Decided that I would prefer black, so I traced the white parts from the kit onto black poster board. Simple enough. The only problem was making 1/8″ diameter holes to slip over the bamboo skewers sticking out of the front where the powerpod slips on. Found these Fiskars 1/8″ single hole punch online at both Amazon and eBay. Made for a neat build.