This is the Rainbow Maiden, a beautiful RC aircraft by David Lewis. It's designed to look like Rainbow Dash, a daredevil pegasus on My Little Pony: Friendship Is Magic. While he doesn't provide any technical specs, we can be confident that Lewis's design at least 20% cooler than an ordinary RC airplane.
Here it is the Rainbow Maiden in flight. Watch it soar! Perhaps with a bit more engine power, it could do a sonic rainboom.