<Table> <Tr> <Th_colspan="2"> Mamba </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Mamba's lift hill </Td> </Tr> <Tr> <Th_colspan="2"> Worlds of Fun </Th> </Tr> <Tr> <Th> Park section </Th> <Td> Africa </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 39 ° 10 ′ 19" N 94 ° 29 ′ 26" W ﻿ / ﻿ 39.171979 ° N 94.490561 ° W ﻿ / 39.171979; - 94.490561 Coordinates: 39 ° 10 ′ 19" N 94 ° 29 ′ 26" W ﻿ / ﻿ 39.171979 ° N 94.490561 ° W ﻿ / 39.171979; - 94.490561 </Td> </Tr> <Tr> <Th> Status </Th> <Td> Operating </Td> </Tr> <Tr> <Th> Opening date </Th> <Td> April 18, 1998 (1998 - 04 - 18) </Td> </Tr> <Tr> <Th> Cost </Th> <Td> $10,000,000 USD </Td> </Tr> <Tr> <Th_colspan="2"> General statistics </Th> </Tr> <Tr> <Th> Type </Th> <Td> Steel </Td> </Tr> <Tr> <Th> Manufacturer </Th> <Td> D.H. Morgan Manufacturing </Td> </Tr> <Tr> <Th> Designer </Th> <Td> Steve Okamoto </Td> </Tr> <Tr> <Th> Track layout </Th> <Td> Out and Back </Td> </Tr> <Tr> <Th> Lift / launch system </Th> <Td> Chain lift hill </Td> </Tr> <Tr> <Th> Height </Th> <Td> 205 ft (62 m) </Td> </Tr> <Tr> <Th> Drop </Th> <Td> 205 ft (62 m) </Td> </Tr> <Tr> <Th> Length </Th> <Td> 5,600 ft (1,700 m) </Td> </Tr> <Tr> <Th> Speed </Th> <Td> 75 mph (121 km / h) </Td> </Tr> <Tr> <Th> Inversions </Th> <Td> 0 </Td> </Tr> <Tr> <Th> Duration </Th> <Td> 3: 00 </Td> </Tr> <Tr> <Th> Max vertical angle </Th> <Td> 66 ° </Td> </Tr> <Tr> <Th> Capacity </Th> <Td> 1700 riders per hour </Td> </Tr> <Tr> <Th> G - force </Th> <Td> 3.5 </Td> </Tr> <Tr> <Th> Height restriction </Th> <Td> 48 in (122 cm) </Td> </Tr> <Tr> <Th> Trains </Th> <Td> 3 trains with 6 cars . Riders are arranged 3 across in 2 rows for a total of 36 riders per train . </Td> </Tr> <Tr> <Td_colspan="2"> Fast Lane available </Td> </Tr> <Tr> <Td_colspan="2"> Mamba at RCDB Pictures of Mamba at RCDB </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Mamba </Th> </Tr>

When did the mamba open at worlds of fun