Our staff writer Jeff Mills takes readers on a ride behind the scenes to explore the workings of modern thrill rides in the last two installments of his "Engineering Behind Coasters" series.

The second and third additions to the series take a look at the various propulsion techniques for coasters, from lift hills to various types of launches. Ever wonder how that coaster manages to hoist you 200 feet in the air so quickly? Ever wonder what keeps that coaster running up the lift hill safely? Jeff divulges these details and more in his series!

For anyone just getting into coasters, these articles provide the perfect introduction to the "secrets" behind the thrill rides that we enjoy!