Of course there is another non-roller coaster amusement ride this year. There is one requirement: rotation has to be a key factor in your build. Of course this doesn't include the rotation of gears, we are talking about the main movement of riders. I trust you will be able to meet this requirement. A hint for the people who like drop towers: ever heard of a roto-drop?
Like for all Summer Heat contests, the deadline is August 27th, 2011. An entry thread will be opened later in the summer.
If you have any questions about this contest, you can ask them here.