273 replies to this topic

[Tyrant]

Yea, pre-calc won't give you everything you need to know. I have just finished up Calculus III, that is when all of this makes sense, and know how to apply it.

As for me, I am on my way to Holiday World, so leave me some questions!

-Tyrant

[RC-Freak]

So basically, would this give a perfect pullup.
taking a 0' straight away and making the slop every long gray rod increase by 10' giving you in the end a 9 gray rod long thing and 90'
??
or should the degree per gray rod be more or less?

[RCT2123]

The on/off ramp explained a lot for me. I think I understand. Correct me if I am wrong, but what you are saying is basically that as the pullout continous the radius just increases. It is like the reverse of a clothoid am I right? If that is so, then I can construct a support system for it...

-Rct2123:cool:

[Tyrant]

Yep, pretty much what a clothoid loop is, is a transition spiral that has a turn of 180 degrees, then mirror it.

-Tyrant

[RCT2123]

I have found a rather easy way to construct this. This picture explains how to do it. You guys can expect some perfect clothoid loops from me, and perfectly shaped pullouts and pullups.



Thanks Tyrant, you have really helped me to understand this...

-Rct2123:cool:

[Tyrant]

Be warned though that all spirals are different, the one that you are posting is a very simplified version of it. For the clothoid loop shape, from the same webpage you got your info from rct2123:



Where S is the distance along the arc, and A is the total number of degrees you want to rotate, where 2*pi is a complete 360, and pi is 180 degrees.

-Tyrant

[RCT2123]

All I really need is a simplified version. Still I am curious as how to caculate this. I get most of it, but what does the thing after the plus mean? Where A is on top and 0 is on the bottom. What is that? Also, what does ds stand for?...

-Rct2123:cool:

[Tyrant]

Heh, that thing after the + and - is a intergral sign, it will become the basis of all calculus. the ds stands for the differential of the arc length. Arc length is typically detonated as S, or dS when intergrating it. the A and 0 is a start and end point for the intergral, in this case A would probably be the length around the spiral in radians, so like I said earlier, a full loop would be 2*pi.

For even more advanced stuff, regarding loops with a constant curvature vs a loop with a constant g-force, check out this site: http://fy.chalmers.s...ng/loop_pe.html

They focus more on the differential type of equations for solving loops.

-Tyrant

[RCT2123]

I wish I knew calculus...

I am still curious though, so I am going to ask my geometry teacher(Who coincidentally teaches pre calc) about some of these. I will see what I can get out of that. Thanks for directing me to the site...

-Rct2123:cool:

[Tyrant]

I can already tell you, it isn't as simple as explaining it to someone quickly. Integrating and Differentating are pretty much an entire new language in mathematics, it is like when teachers tried to teach you how to do algebra the first time. It has taken me two years (4 math classes) to finally feel really comfortable doing integration and differentiation.

-Tyrant

[RCT2123]

Actually algebra made perfect sence to me when I first learned it. I know where you are coming from though, I am not trying to learn everything, I would just like to know a little about what to expect, and how calculus works...

-Rct2123:cool:

[Tyrant]

Well, this calculus is the deep shit kinda calculus, lol, esspically the partial differntials that are talked about in the Loop Shapes webpage I sent.

-Tyrant

[RCT2123]

Lol, I think I will just stick with the picture I found, since it makes perfect sence to me......

-Rct2123:cool:

[Top_Thrill_Dragster33]

Ok, I finally have an update. I got a twenty foot tower done but I still need to build extra structure.

pics \/ Remember that this tower is still free standing!





And now my personal favorite!


Any questions?

[Tyrant]

How does the tower do in torsion? (rotation) as it doesn't look like there are many lateral supports.

-Tyrant

[RC-Freak]

Holy crap that looks amazing.
Can't wait for a 33foot tower!!

[PlanetSaturn56]

^^What does rotation have to do with anything?

-PS56:king

[coastercrazy10]

^Twisting will be very bad for the tower.

If you're going for 33 feet and that's all the wider your coaster will be, that's really, really bad. It'll look like a toothpick. It MUST be wider if you want it to look good.

-CC10

[PlanetSaturn56]

^Oh, i never knew that.

Was that TTD33 standing next to the tower in that one pic?

-PS56:king

[KNexCoasterCreator]

So many pieces....so few used on such a small...tall tower. It needs to be bigger in width...
Lo siento pero...ew.