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|Headquarters||Cincinnati, Ohio, USA|
The Gravity Group, LLC is a roller coaster design firm based in Cincinnati, Ohio, USA. The group specialises in wooden roller coasters. It is made up of a core group of five people, who all have backgrounds in civil, structural and mechanical engineering.
Gravity Group was founded in July 2002 by employees of the famed, but now defunct Custom Coasters International. Because of this, its employees have had experience with over 40 roller coasters. The first roller coaster designed under the Gravity Group name is Hades (now Hades 360) at Mt. Olympus Water & Theme Park, which opened in 2005.
Gravity Group then went on to design one of the best wooden roller coasters in the world, Voyage at Holiday World, currently ranked at #4 by Mitch Hawker's Best Roller Coaster Poll.
The company also designed Ravine Flyer II at Waldameer in Erie, Pennsylvania, USA. It opened in 2008, and is currently ranked at #6. Another notable roller coaster designed by the firm is Wooden Warrior at Quassy Amusement Park, which gives a great ride, despite being only 35 feet tall.
Gravity Group were also involved in the rebuilding of Libertyland's Zippin Pippin at Bay Beach Amusement Park in Green Bay, Wisconsin, USA.
In 2008, Gravitykraft Corporation was created. Gravitykraft handles much of the manufacturing, including building the Timberliner trains, whereas Gravity Group continues to design the roller coasters.
In 2008, members of The Gravity Group announced the development of their own wooden roller coaster trains, called Timberliners. They are manufactured by Gravitykraft Corporation,, a sister company of Gravity Group. The Gravity Group promotes their trains as the only wooden coaster trains capable of steering through curves, resulting in a more comfortable and maintenance friendly ride. Timberliners were planned to debut on Voyage at Holiday World for the 2010 season, but the trains faced delays. In 2011, Timberliners were installed on Wooden Warrior at Quassy Amusement Park and Twister at Gröna Lund in Sweden.
Timberliners were also installed on Hades at Mt. Olympus Water & Theme Park for the 2013 season, when it was remodelled into Hades 360.
All Gravity Group installations are wooden. As well as those included in the table below, there are three new Gravity Group roller coasters being installed in various Fantawild Adventure locations.
|Boardwalk Bullet||Kemah Boardwalk||USA||Martin & Vleminckx||96 feet||51 mph||3,236 feet||2007|
|The Cú Chulainn Coaster||Tayto Park||Ireland||Gravity Group/Gravitykraft||105 feet||56 mph||3,590 feet||2015|
|Dauling Dragon||Happy Valley||China||Martin & Vleminckx||105 feet||54.1 mph||3,651.6 feet||2012|
|Fjord Flying Dragon||Happy Valley||China||Martin & Vleminckx||111.6 feet||54.1 mph||3,989.5 feet||2013|
|Hades 360||Mt. Olympus Water & Theme Park||USA||136 feet||60 mph||4,746 feet||2005|
|Ravine Flyer II||Waldameer||USA||80 feet||57 mph||2,900 feet||2008|
|Roar-O-Saurus||Story Land||USA||Gravity Group/Gravitykraft||40 feet||33 mph||1,240 feet||2014|
|Switchback||ZDT's Amusement Park||USA||Gravity Group/Gravitykraft||64 feet||41 mph||1,196 feet||October 17, 2015|
|Twister||Gröna Lund||Sweden||Gravity Group/Gravitykraft||51 feet||38 mph||1,544 feet||2011|
|The Voyage||Holiday World||USA||159 feet||67 mph||6,442 feet||2006|
|Wooden Coaster - Fireball||Happy Valley||China||Martin & Vleminckx||108.3 feet||55.9 mph||3,818.9 feet||2009|
|Wooden Warrior||Quassy Amusement Park||USA||Built in-house||32 feet||35 mph||1,239 feet||2011|
|Zippin Pippin||Bay Beach Amusement Park||USA||Martin & Vleminckx||70 feet||42 mph||2,347 feet||2011|
|Time Travel||Hot Go Park-Happy Jungle World||China||Martin & Vleminckx||103.3 feet||58.4 mph||3,681.1 feet||September 2014|
|Timber||Walibi Rhône-Alpes||France||Gravitykraft Corporation||55.8 feet||40 mph||1,464 feet||April 9, 2016|
|Mine Blower||Fun Spot America||USA||Gravity Group/Gravitykraft||82 feet||48.5 mph||2,256 feet||2017|
|Oscar's Wacky Taxi||Sesame Place||USA||Gravitykraft Corporation||43 feet||34 mph||1,205 feet||May 26, 2018|
|Wood Express||Parc Saint Paul||France||Gravitykraft Corporation||50 feet||38.2 mph||1,588 feet||2018|