<Tr> <Th> Trains </Th> <Td> 2 trains with 5 cars . Riders are arranged 4 across in a single row for a total of 20 riders per train . </Td> </Tr> <Tr> <Td_colspan="2"> Thunderbird at RCDB Pictures of Thunderbird at RCDB </Td> </Tr> <P> Thunderbird is a steel roller coaster in the Thanksgiving section of Holiday World & Splashin' Safari . Designed by Bolliger & Mabillard, the ride opened in 2015 as the eighth Wing Coaster in the world and the fourth in the United States . </P> <P> Thunderbird is the manufacturer's first launching coaster in sixteen years and the first B&M launch built in - house (The Incredible Hulk Coaster at Islands of Adventure uses a launch system supplied by the park). The Wing Coaster reaches a speed of 60 miles per hour (97 km / h) in 3.5 seconds and features the tallest vertical loop on a Wing Coaster . Thunderbird had its first test run on 8 March 2015 and opened to the public on the 24 April 2015 . </P>

When does the thunderbird open at holiday world