Flip Flap Railway was the name of a looping wooden roller coaster which operated for a number of years at Paul Boyton's Sea Lion Park on Coney Island in Brooklyn, New York.

These rides, known as "centrifugal railways", were initially designed to be temporary installations and they achieved little success.

[1] The Flip Flap Railway was tested in Toledo, Ohio in 1888 by designer Lina Beecher before the coaster was moved to Coney Island.

[3] The coaster had a single rail and riders rode two-to-a-car and sat in tandem.

The circular nature of the coaster's loop, as well as its relatively small diameter of 7.6 metres (25 ft),[3] meant that it could produce forces of approximately 12 g0 (120 m/s2).