Complex sentence: The Short SB.1 was a British tailless glider designed by David Keith-Lucas and Professor Geoffrey T.R. Hill and built by Shorts as a private research venture to test the concept of the aero-isoclinic wing, it being the first aircraft to incorporate this feature.
Split into simpler sentences: The Short SB.1 was a British tailless glider designed by David Keith-Lucas and Professor Geoffrey T.R. Hill. Built by Shorts as a private research venture to test the concept of the aero-isoclinic wing, it was the first aircraft to incorporate this feature.