Complex sentence: The last of the family was the HM.7 built in 1947 which was an enlarged four-seat version powered by a 240 hp (179 kW) Argus As 10C engine, the HM.7 was the last powered aircraft designed by the Institute.
Split into simpler sentences: The last of the family was the HM.7 built in 1947 which was an enlarged four-seat version powered by a 240 hp (179 kW) Argus As 10C engine. The HM.7 was the last powered aircraft designed by the Institute.