Cirrus Aircraft has flown just two evolving versions of its single-engine Vision Jet since the first iteration debuted in 2008; the one that flew for the first time on March 24 is the first conforming prototype, built on the production line using the production drawings. The company calls this version C-Zero. All the other jets to roll off the assembly line will be very close to exact copies of this one in terms of exterior design and performance. (C-Zero is not equipped with cabin amenities.) During the first…