Designed to ferry a sub-orbital spacecraft between it's twin fuselages, the Scaled Composites White Knight Two, first flown in 2008, can ascend to a maximum height of 70,000 feet. The pilot steers from the right fuselage. Virgin Galactic plans to use this ship to carry its SpaceShipTwo to 50,000, where it will detach from the White Knight and ascend to suborbital altitudes of nearly 70 miles. PERSONAL NOTE: i havent tested the planes maximum height in simple planes yet, as its maximum speed of 268mph is very slow and getting to a maximum height would take a while. but SpaceShipTwo is fun to fly around, and it can free fall to the ground if you turn the rotator to 90degrees -BlueWhiskyYT