In 1977, construction began on a steel looping shuttle coaster called Lightnin' Loops (which was removed in 1992). Late that year, however, the park was purchased by Six Flags. This regional theme park company was owned then by Penn Central, which had large stakes in the Philadelphia and New York City regions. Six Flags added rides found in bigger theme parks such as the wooden coaster called Rolling Thunder in 1979, The Buccaneer (a swinging ship from Intamin), Roaring Rapids (now Congo Rapids, an Intamin River Rapids ride), Parachuter's Perch (now Parachute Training Center: Edwards AFB Jump Tower, an Intamin Parachute ride) and Freefall (later Stuntman's Freefall, an Intamin First Generation Freefall), all before the park's tenth anniversary.