Original sentence: Hughes formally relinquished power in 1961 in the battle of the purchase of the Convairs.The battle over Hughes' control continued until a court order in 1966 forced him to sell his stock at a profit of $546 million (which he used to create new airline Hughes Airwest)
Edited sentence: Hughes formally relinquished power in 1961 in the battle of the purchase of the Convair 880 jetliners.The battle over Hughes' control continued until a court order in 1966 forced Hughes to sell his stock at a profit of $546 million (which he used to purchase the regional carrier Air West and rename the airline Hughes Airwest)