Kyle spent about six months on his Spitfire, and the finished model has a wingspan of 112 studs and is 96 studs long. Not only is the Spitfire model gorgeous (too many LEGO Technic models are just skeletons in odd colors), it also includes lots of functionality:
- Spinning propeller with adjustable prop pitch
- Rolls-Royce Merlin V12 engine with working pistons
- Working landing gear
- Cockpit joystick and pedals that connect to working control surfaces
- Working rudder, elevator, and ailerons
The YouTube video shows off all the moving parts.