For those choosing engines for the Puppeteer, I started with an old OS 48 FS and it flies quite good, with ample power. The 48 died and I retrofitted an OS 52 FS with the same OS 48 carburetor to avoid start cutting wood in the firewall area. I would think that the OS 52 may drop a bit of power with the 48 carburetor but I really could not notice it. The 52 nicely overpowers the bird. For scale take offs do not go beyond 2/3 of throttle, other wise with the lightest breeze you can be airborne in a few metters climbing 45 degrees. (I fly in Santiago, Chile at 500 meters over sea level.) Keep an eye on reducing power on dives as I did experience flutter lossing both right ailerons. The pup flies so well I only realized this problem after landing.

I did experience some overheating that was solved by adding simple bafles around the cylinder.

I use only one standard servo for all ailerons, just as per the plan. If you use two servos make sure to duplicate the diferential aileron efect as this is one of the nice features of this plane. It allows you to turn extremely tight if you want.

I am an old modeller with more than 15 models in airborne condition and although I have much more exotic and fancy planes THIS is the one I like and fly the most. For those weeends after a really stressing and ugly week, this is the model to go!

I have a Flair D 7 in the production line also. Will report once I start.