Complex sentence: After the study Burt Rutan went back to scaled composites and started tossing around the idea of producing such an aircraft, in 1985 he began taking these ideas to the drawing board, and decided to produce a demonstrator aircraft, which was built in 1986.
Split into simpler sentences: After the study Burt Rutan went back to Scaled Composites and started tossing around the idea of producing such an aircraft. In 1985 he began taking these ideas to the drawing board, and decided to produce a demonstrator aircraft, which was built in 1986.