4 stroke ultralight engine takes flight! Presenting the latest project... Thump-Air!

I am still working out tuning details such as redrive ratio, prop pitch, and dialing in the carb . At this point I am confident enough to take flight, even if I haven't extracted every last ounce of hidden performance. It has been a blast fast tracking this project, and I am excited to bring it to reality just in time to fly at airventure!! I have some test flying to do,  keep your eyes peeled for more action coming soon!