Dave Wigley’s Wyvern has a 100cc gas engine and it turns a 3-blade prop. There is a dummy scale (non-powered) second counter-rotating set of props mounted in front of the powered set and it sounds like an amazing warbird when it flies by! Awesome Dave!!! The torpedo drop is cool too!
Senior Technical Editor About Me: I have a lifelong passion for all things scale, and I love to design, build and fly scale RC airplanes. With 20 plus years as part of the Air Age family of magazines, I love producing Model Airplane News and Electric Flight.