I had the Prodij DSing in South Dakota on our recent Slopin’ Safari and it hauls ass! I have noticed before that it handles like a larger plane and the same holds true in the DS circuit, especially with the ballast. It covers lots of ground and really retains energy well. I was getting 400-500 foot punchouts after building up the speed!
The Prodij flies a bit differently than most other planes. You can fly it like most conventional 60-inch planes and it will already be as quick or quicker than most. But if you really want to extract the most performance make sure you set up your radio to use the left (throttle) stick to work the trailing edge as flaps. To get the plane to fly in lighter lift and really haul in heavier conditions, you have to be able to add camber or reflex. I have the flap set at neutral when the left stick is in the middle and am constantly using the left stick to change the wing to maximize what I am doing. This is the way the designer intended the plane to be flown.
I used a piece of PVC type electrical conduit that is Shoo-Gooed to the side of the fuse along side the servos. I can get about 12 oz with a steel bar and more with lead, although I have not cast the lead piece yet. On this plane 12oz is pretty good. The thing is already fast because of the thin airfoil and the clean wing so the weight helps it really cook.
I used this plane for the Unlimited Class at the Midwest Slope Challenge and was very impressed with how fast it was in the light conditions. Several people commented on how quickly it accelerated when the nose was pushed down. In fact the acceleration helped me win one of the heats as we both dove for the finish line.
The durability of the plane was also tested in a race where the wind had come up allowing some good height to be gained before the start and as my competition and I dove for the starting line, holding until the last possible second to pull through the line, when I was about 2 feet off the deck, he bounced off the top of my Prodij slamming me into the ground. I am not sure how fast we were going, but it was fast for sure. Several people thought the plane must have been destroyed. As it turns out just a small hole was punched in the nose cone.