Complex sentence: At the end of 1937 Sproule and Ivanoff decided to design a glider that would cheap, be easy to control and have a good speed range, it would also have wing-folding for quick assembly.
Split into simpler sentences: At the end of 1937 Sproule and Ivanoff decided to design a glider that would be cheap, be easy to control and have a good speed range. It would also have wing-folding for quick assembly.