Now Norwegian developers have come up with the disc-shaped SiMiCon rotorcraft that could overcome these shortcomings using a flying saucer design. The circular fuselage, which is about 14 feet 8 inches in diameter, contains retractable rotor blades that spin rapidly to attain lift. Once the craft is in the air, a small jet engine provides forward flight. If the craft needs to hover, the operator extends the rotor blades outward once more. Small amounts of sideways thrust from the jet engine keep the craft from spinning like a top.