Cobra Roll Making on Elementary

Overall I find Elementary easy, i put loads of numbers in and usually it works. BUt Im having trouble with the Cobra Roll's. Whenever i put the 3 setting numbers in i doesn't invert it just goes crap. HOw do you make the perfect Cobra Roll.

Also how do you heartline inversions?

Cobra rolls with Elementary aren't fun. It's possible to do them but very difficult to get correct shaping. My suggestion for the best technique with the most realistic result would be to splice 2 halfloops (buster's loop wizard or hsak should work...I'd use the loop wizard myself) and an FVD section in the middle. It'd be a pain with all the sizing, possibly several hours worth of pain, but you could get a really high quality product in the end.

Read up on AHG for heartlining inversions.

Yeah, I can't offer much help there. Even after switching my build technique entirely to FVD, I still make my cobra rolls by hand. It's just too much of a pain in the ass to do it with math.

Making the top part of a cobra roll with FVD actually isn't that difficult, though. All you have to do it start FVD'ing right after the train has flipped upside-down, with slope of 80 degrees or so and banking of 170 or so. Then drop the g's briefly at the top, lose about 150 degrees of banking while pulling the g's back up to 3.5 or so, and flip pack the other way. The tricky part is making the transfer from flat to the beginning of the rolling. As much as I've tried, the FVD just won't bank properly while upside-down.

It will, you may have to mess with your banking timing and things like that but with a lot of care you can get it to work.

You have to consider tilt and things like that too...if you haven't used Elementary and Purg a lot, particularly for splicing together track pieces, I'd say don't use a cobra roll in your design now, and try easier elements. Once you have more experience then try, but even then it can be a pain.

It depends how picky you are with the shaping.

I have made good cobra rolls just by using HSAK consisting of a half loop > half cork > half cork > half loop. It can be very difficult and depending on the type of ride you may not get the result you want. I've never tried FVD'ing the middle, but i would imagine that it is very hard.

I think he means the cobra roll formula that you get with elementary...
You have to heartline it, than it should work perfectly...
At least that's what I do![:D]