What is a catapult launch on roller coaster?

A catapult launch is a method used to propel a roller coaster train from a standstill to a high speed in a short amount of time. It involves the use of a hydraulic or pneumatic system to accelerate the train along a track.

Here's how a catapult launch typically works:

1. The coaster train is positioned at the start of the track, which is usually inclined at an angle.

2. A large flywheel or piston is engaged, which stores energy.

3. When the launch is initiated, the flywheel or piston releases its energy, propelling the train forward along the track.

4. The train accelerates rapidly and reaches a high speed in a matter of seconds.

5. As the train exits the launch track, it transitions onto the main coaster track and continues its journey.

Catapult launches are often used on roller coasters to provide an exhilarating and high-speed start to the ride. They are particularly effective in generating a sense of acceleration and excitement for passengers.

Some notable roller coasters that feature catapult launches include:

- Xcelerator at Knott's Berry Farm: This coaster has a hydraulic launch that propels the train from 0 to 82 mph (132 km/h) in 2.3 seconds.

- Top Thrill Dragster at Cedar Point: This coaster uses a pneumatic launch to accelerate the train from 0 to 120 mph (193 km/h) in just 3.8 seconds.

- Do-Dodonpa at Fuji-Q Highland: This coaster has a dual-stage hydraulic launch that propels the train from 0 to 107 mph (172 km/h) in 1.56 seconds.

Catapult launches are a popular and effective way to add excitement and thrill to roller coaster rides, and they continue to be used on many new roller coasters around the world.