To achieve maximum speed on most roller coasters, you slowly pull out of the loading station and ascend to the crest of that first hill with the assist of a chain lift -- and then take a dramatic first drop.
원문출처 : https://www.cnn.com/travel/article/maxx-force-launch-coaster-six-flags-great-america-illinois/index.html
원문출처 : https://www.cnn.com/travel/article/maxx-force-launch-coaster-six-flags-great-america-illinois/index.html