The Kraken is a 396mm stretched X frame, running 10inch CF props. It was built to be my longest range quad, and so far it has been doing well at that. I have reached 8.2km with her, and have plans to ultimately reach 15Km. With 3inch pitch on the rotors(props), she doesn't bite the air too hard, but it will give me 20 minutes of flight time with a 6s/3700mAh battery flying at about 40mph. And it will reach out further with a 8000mAh battery. With 7 inch pitch rotors she really gets with the program.