The Dr1 is a great flying plane but it does a fatal flaw in that the lower wing lacks a hardwood spar! This makes it very susceptible to fracturing if you catch a wing tip on landing. I flew mine with an OS.70 Surpass and had plenty of power, flew it at 1/2 throttle most of the time. It will turn on a dime and give you 9 cents change. Flat turns are beautiful to watch and this plane excels at stall turns. I lost mine when I had a basement fire that destroyed several of my planes. I am looking for a larger scale Dr1 now, maybe at Perry.
Happy Flying!
LOOPMAN