For my trainer, I need to make an undercarriage and make wheels myself , but I don't know how to make and which material is the best. Can anyone help me ?? ???
You can make by metal wire landing gear and wheel you can buy it is cheap
Check this out: http://flitetest.com/articles/DIY_Landing_Gear (http://flitetest.com/articles/DIY_Landing_Gear)
I use cycle spokes and old toy car wheels