The Transition Roadable Aircraft easily changes to a car. It takes about twenty seconds. It's like putting the top down on a convertible(折篷汽车), only instead of folding up your roof, we're folding up our wings and we're transferring power from a propeller(螺旋桨) to the wheels for driving on the ground.

　　Development began in 2006, and the first road and flight tests took place in 2009. The Transition had to meet federal safety standards for cars and aircraft. Last year the Federal Aviation Administration agreed to let it weigh more than other light sport aircraft. But even fully loaded, it still weighs about half as much as an average car.

　　The aircraft can climb to more than 3,000 meters. It can carry two people at speeds over 160 kilometers an hour in the air. And on the ground it can drive at 130 kilometers an hour.

　　The company expects to complete the building process for its flying cars within the next few months. Then it will begin an intensive year­long testing program. Terrafugia expects the Transition to reach market, at a price of around $250,000. So far, nearly 100 people have already signed up as buyers. Many more are considering the purchase.

　　1. Who is Carl Dietrich? (No more than 8 words)

　　________________________________________________________________________

　　2. What is special about the Transition airplane? (No more than 7 words)

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