I built a Lancaster plane that was designed by Jay from frcfoamies.com. Its a 62" wing span foamie designed to fly with 4X 1400kv motors. The plane however was designed for belly landings and I wanted to install landing gear on it since the field that I fly at could be harsh given the size and weight of the plane. So using a combination of 3d printed parts, carbon fiber rods, springs, and wheels (of course) I think we have a pretty good setup that weighs at 50g/gear. Take a look at the video below:
Here's a little description on how you could go about doing this.
Bill of materials:
2) 5-5.5mm carbon fiber tube (~3mm inside diameter)
3) 3-3.2mm carbon fiber rod/tube
4) 11/32” x 0.047” x 1-1/2” long spring for suspension
5) Rubber bands: Google “Clear transparent hair rubber bands”. I recommend these since they can withstand the weather a little better than the normal ones for their size. Can also make from bicycle tube.
6) Glue: CA and/or epoxy
7) Thin music wire for hook
The CF tube dimensions should be cut out as shown above.
The 5mm x 40mm tube can be extended/shortened if you need more/less clearance.
The length of 3mm x ~70mm CF rod/tube will depend on the distance between the main gear base plate and the pivot base plate. The larger the distance the longer the tube and vice versa.
Additional 3mm CF rods will be needed to make the hinges and generally should be ~35mm long
Here are some screenshots that I took from my guide thats already posted on thingiverse so you'll have it when you download the STL files:
Glue the CF tubes as shown in this picture. I used CA glue.
The base plates and the pivot holder plates were designed to provide pivoting function and are specific for the mentioned plane. However, one could simply use "scaled-up" control horns made from plywood to accommodate the setup for any other plane. Simply place them apart with use of spacers/washers as necessary.
And you are all done! Hope you find this useful.