Almost finished with this 1/4 Vampyr. Built in 1921 with 'normal' ailerons the 1922 version had 'warping' ailerons. The 1923 version had an enlarged rudder. Hmmmm...
The build can be found on RCAerotowing.com. The ailerons 'warp', the rudder has pull-pull and the stabilator is mass balanced. It is ready for ply and fabric.
Depending on the number of responses and views I just might put my next build here on RCU! The Balestruccio didn't get much action here.