Really nice! Tip #1. The Radian climbs really nicely on half or 2/3 throttle. At first it will surprise you how the nose pitches up with application of throttle. This plane is optimized for gliding, not performance under power.
You'll have to learn just how much down elevator to mix in with extreme throttle settings. Once you get a few launches under your belt it will become second nature and you won't even think about it. Take it easy on the first couple of climbs to altitude and then experiment with higher throttle settings, mixing in the down elevator to keep the path you choose.
The Radian's power is intended only as a quick elevator to the top. It was not designed to fly around with power on all the time. You'll love the plane!
Let's say you use too much throttle, are taken by surprise and the plane starts to loop on launch. Don't let this happen close to the ground. 2/3 throttle in your hand, then launch. Throttle up later. Alternately you can launch by giving the plane a level toss with power off and then easing into the throttle to climb out.
Okay, you're halfway up the climb at high throttle and a gust of wind, or just the tendency to pitch up under power takes the plane past the vertical point where it's over on its back. What do you do now? Don't panic. Everything is under control and any friends watching will compliment you on your aerobatic skills when you're done.
First, ratchet back the power. Give the plane some up elevator because what we're going to do is not fight the plane. We're going to let it complete the loop, recover and resume our climb. So pull back the power all the way to a quarter throttle, or even turn the motor off. Then use up elevator to let the plane come around in a nice round loop. She'll come down, turn level at the bottom with great speed and begin climbing into another loop.
We're not going to let it get that far. You let it climb after the loop to bleed off the excess speed. Now you need some power to climb. So let it continue out of the loop into another climb. Smoothly release pressure on the elevator to maintain your climb angle at about 45°. Ease in half throttle and maintaining a steady climb angle with the elevator, dial in as much power as you feel comfortable with. Now brag to your friends that the loop was planned all along.