A lot of people want to know how I did the roll back, seen on Caelum and my new coaster Macaw
As done by Caelum.
Part 1:
EDIT: It must have a slope of at least 1.7 degrees!
At first you make a brake segment and a launch like normal. The brake segment has to brake the train, but slightly slip through it, so it will launch. Set the brake segment as 'Complete Stop', choose the time you want to stop it after the roll back. Set the 'Trigger' at 'Front Car' and almost all the way to the right (how further to the right, how further it will roll back). Also set 'Launch' on, with the G's you want. When tested now in the simulator the train have to slow down, but not stop, then the train will be launched.
Part 2:
Now make a small brake segment after the first brake segment. This segment has to stop the train.
Set the brake segment as 'Complete Stop' choose the time you want to stop it before the train rolls back. Set the 'Trigger' at 'Front Car' and almost all the way to the left (Also here how further to the left, how further it will roll back). And the most important thing, set 'Launch' on, but with 0G, so the train will roll back when it should be launched.
And then you will see the train will caught by the previous brake. It will stop and launched.
And that's all, you will have to take the time to adjust the settings till it completely works.
The settings for the trick right in the station is different then this one. I will make a pre-made track for only the launch so you can use that. But the way as done by Caelum, I can't make a pre-made track, because it depends on how fast the train is going.
I hope it helped you to make it. Good luck.
EDIT:
As done by Macaw.
I uploaded the track files which can be used to make that rollback out of the station.
There are 3 different versions now. All for the hyper coaster (2 seat).
4 Car version: http://www.mediafire.com/download/7drtd6y7qva197p/Intamin_Launch_Track_4_Car.nltrack
5 Car version: http://www.mediafire.com/download/44tsimyhk3pbik4/Intamin_Launch_Track_5_Car.nltrack
6 Car version: http://www.mediafire.com/download/1gxfy7rfsai474i/Intamin_Launch_Track_6_Car.nltrack
Everybody is free to use it. It would be nice if you give me the credits for the technique.
Enjoy it.
Ps. If you want to use a longer or shorter train than available, or you want to work this with a other track style, you can sent me a message (Facebook, E-mail, Youtube) and I will change the settings till it works for you.