The landing gear on the Old Speedster is held on with one rubber band. When I assembled my Speedster and installed a battery the landing gear was sagging. Check the first picture. I tried adding a second rubber band but the skewers were beginning to bend and the model was still sagging, so I decided to see if I could come up with something that would work better for me. It involved a foam board landing gear doubler with some bamboo skewers. The doubler gets hot glued inside the fuselage above the original landing gear mount point. The 1/2″ round holes were made with a FoamWerks Drill. It worked great.
Several years ago I bought my first Multiplex FunCub. One distinguishing feature is the tundra tires. Not just for looks, they help get through thick grass. And so since then I have been putting large wheels on all of my R/C model airplanes. The tires shown in the pictures below are the ones that come with the FunCub. Yes, you can still buy them.
Years ago we used wheel collars to keep the wheels on the axles. Here is another option. Use #4 flat washers and small silicone fuel tubing. Use this sequence. Put the wheel on the axle, then the washer, then squeeze on the fuel tubing before you cut it. If you cut a small piece and then try to squeeze it on, it will be difficult. Cut the tubing after it is in place on the axle.
The club that I belong to has a grass flying field. While it is cut once a week, if you go flying the day before grass cutting day, the grass can be thick; great for nose overs on takeoff. So for a long time I have been putting larger than normal wheels on my models. It all started years ago when I bought my first Multiplex FunCub, which came with Tundra Tires. Never have a problem flying off grass no matter how thick or deep with those wheels. So I continue to use larger wheels even on my foam board planes. When I take the Speedster in to a club meeting for Show & Tell, it will have the wheel pants option. But when I go to the field flying it will have the larger wheels.
One of the many great ideas on the FliteTest YouTube Channel. A guy named Denver appeared in one of the videos. He was attending a Flite Fest and showed Josh an idea for using pop rivets as wheel bushings. In the video Josh used a pair of pliers to separate the rivet. I came up with this alternative. In my case I was using large (4″) wheels and the standard axle was too small. So I put a couple of these in each wheel to make a perfect fit.
You need a few pieces of scrap wood, some rivets, and a hammer. The rivets I bought were 3/16″ diameter, 1/4″ and 1/2″ length. Use the size that fits your wheels. Drill a hole in the scrap wood 7/32″ all the way through. Put the rivet in the hole, tap it with the hammer to separate it, and you have one bushing. Depending on which wheel you are using, you may need to open up the axle hole to 3/16″. Repeat as needed.
Wanted to add a tail wheel to my Old Speedster. Most of the solutions that I came up with were on the heavy side. This one is not. Here is one way to do it. The thin plastic tubing is about 1 1/2″ long. A better solution might be to have the tail wheel supported at the fuselage to take the weight off of the rudder. Maybe version #2.