Like for all Summer Heat contests, the deadline is August 27th, 2011. An entry thread will be opened later in the summer.The major contest of this year's Summer Heat is a custom train contest. Your roller coaster can be as small or as huge as you want, as long as you use a custom-designed roller coaster train. Inverted coaster, flying coaster, spinning coaster, 4D coaster, everything is possible now! We recommend you come up with your own train or car design, instead of using someone else's. That would definitely give you bonus points.
If you have any questions about this contest, you can ask them here.