Rough landings and foam board planes don’t mix well. After experimenting with several different options, I designed a lightweight, easy to install 3D-printed spring suspension landing gear system.
The landing gear system adds minimal weight (60g; 90g with large three-inch wheels) and is a breeze to add and remove—no tools needed. Nor does it require extra hardware to reinforce the bottom of the plane. Instead, the spring suspension system directs the load upon landing to the wing-mounting carbon fiber rods.
In addition to reducing stress on the plane during hard landings (no more crunched foam!), the system enables smooth takeoff and landing from your average ball field. Plus, it looks cool!
Ready to print your own landing gear? Find 3D models and printing and assembly instructions here. My website has more design ideas and free plans. I designed the system specifically for the Dual Prop Sport (stay tuned for my next Flite Test article), but would also be compatible with your own plane design with a 2.25" (60mm) x 2.75" (70mm) fuselage.