Ninja (Six Flags St. Louis)

Roller coaster in the United States
Watch the on-ride POV
The sidewinder element
Six Flags St. Louis
Location Eureka, Missouri, USA
Coordinates 38°30′52″N 90°40′24″W / 38.514546°N 90.673293°W / 38.514546; -90.673293
Park section Studio Backlot
Status Operating since April 8, 1989
Rider height 48 inch minimum
Replaced Jet Scream
Expo '86
Name Scream Machine
Location Vancouver, British Columbia, Canada
Operated May 2, 1986 to October 13, 1986
Manufacturer Vekoma
Product Custom MK-1200
Builder Arrow Dynamics
Designer / calculations Ron Toomer
Type Steel
Propulsion Chain lift hill
Height 108.3 feet
Drop 80 feet
Top speed 54.7 mph
Length 2430 feet
Inversions 4
Duration 2:00
Rolling stock
Manufacturer Arrow Dynamics
Riders per train 28

Ninja is a steel roller coaster located at Six Flags St. Louis in Eureka, Missouri, USA. It previously operated at Expo '86 in Canada as Scream Machine during the 1986 season.[1] Ninja formerly shared its name with Blue Hawk at Six Flags Over Georgia. Another coaster with the same name still exists, but that is an Arrow Dynamics suspended coaster at Six Flags Magic Mountain.


Originally known as Scream Machine, this ride was first built at Expo '86 in 1986. Construction was originally started by Arrow Dynamics, but the company fell into bankruptcy, so the ride was sold to and finished by Vekoma. Scream Machine opened on May 2, 1986 and closed on October 13 of that year.

In 1988, it was announced that Scream Machine would be relocated to Six Flags St. Louis as Ninja.[2] Ninja opened at its current location on April 8, 1989.

In 2016, the ride received virtual reality headgear showing a New Revolution film that many other Six Flags parks received.[3]



Color scheme

Ninja had a red track with white supports. In 1998, the track was repainted black.

Ride experience

Riders are held in with hard, rubber over-the-shoulder harnesses. The ride's layout begins with a left turn out of the station, and then riders climb the 108 foot tall lift hill. Riders turn right, and descend an 80 foot drop into a vertical loop, and then a sidewinder. Coming out of the sidewinder, there is a headchopper moment with the lift hill chain right above riders' heads. Riders then glide into a turnaround before hitting the mid-course brakes. After that, riders turn right, into the double corkscrew element. Another turnaround follows, then a close-to-the-ground left turn, before hitting the final brakes.


3 trains with 7 cars per train. In each car, riders are arranged 2 across in 2 rows, for a total of 28 riders per train. The trains are manufactured by Arrow Dynamics.



  2. "Six Flags helps kids love to read". The Daily Journal. November 17, 1988. p. 13. Retrieved December 29, 2021.
  3. "The New Revolution Virtual Reality Coaster Opens at Six Flags St. Louis".

External links

  • Ninja on the Roller Coaster DataBase.

Articles on Six Flags St. Louis