Here you can download free plans for a foam rc plane.
Laser Cut DIY Depron Rc 3D Plane
Custom build for drone fishing
DIY rc fpv plane . crazy proximity acrobatic
How to make a RC GUN that shoots
How to Build the AirCore Power Core and Spitfire RC Plane
How to make a quadcopter at home # (Part-1)
Eachine E013 Plus Acro Racing Drone Review
Dropping Bombs with the STUKA
Online calc of the CG of an RC airplane