I worked on a MiG-21 for a while and that had a really high wing loading so I want to try something in the opposite direction. The U-2 is one of only five planes in service with the USAF for over 50 years and was designed back in the 1950s by Skunk Works. I'm really excited to attempt an airplane with this large of a wingspan, everything I've made in the past has stopped at around 6 feet in width. With a wing this long, do you guys think a more heavily reinforced spar will be needed? I've built the nose section and it took an entire sheet of foamboard. This is going to be an exciting build.