226 replies to this topic

[rollercoasterfanatic919]

Okay, I was just making sure. That is weird that they are the same height, pullout length and everything, I didn't realize that!

[coasterfanatic11]

Wow! that is a coincidence! The coaster looks great, rcf919, I wish I had that many X ties... oh well! Do any of you guys know a cheap way to get X ties?


300th POST!!!

-cf11 :cool:

[CabbyJake50]

Get them on ebay for like $5 there super cheap.

90th Post

[rollercoasterfanatic919]

Hey guys, I finished the cobra roll for the most part. Bad news though, it doesn't make it past the top of the second half loop, and it's not even close. I have tried and tried multiple times to help it make it, but nothing has worked. I made it lower a few times, and I refuse to make it any lower. I don't like the look of the cobra roll either. I was thinking about making an immelmann instead, I think it would flow better and look better. My mom is also getting a bit frustrated that I can't get to my bed very well, and making an immelmann would make it much easier. Give me your opinions, but I think I am going to go with the immelmann.

Overview


Cobra roll


Front view


Pullout (the supports and blurry picture make it look like there is sharp spots and straight parts, but if you cover the supports with your hand, you can tell that there isn't)


Half loop (and ugly banking on the left)


Back view


Twist


Comment! Be harsh!

[RightWayTrey]

The half loop looks nice, but I think you should lower the middle. Then you can unbank it too.

[pkiknex25]

Your 2 half corks are probably part of the problem. Like Ben's on Redline, it needs a lot less banking. Also, B&M's don't really go all the way to 90 degrees on the twist, like there's a slight turn in there.
http://www.rcdb.com/...2.htm?picture=8

[Fraggie]

i think it would be cool if you angled the pullout of the exit of the cobra roll and then do a zero-g roll through the loop. anyone think that is a good idea? other than that, this is looking amazing.

[Mikecoastermaniac]

That cobra roll doesn't look too good... Its too wide, and sidewinder sits too far up. Since ours loops were the same size. Here is what shaping should look more like..

[rollercoasterfanatic919]

Thanks for the advice guys, I will fix those issues. Still though, it doesn't make it, and mine is the same height as MCM's. I don't know why, and I really don't want to lower it. It doesn't hit any crossties, nor does it shake. I guess I will have to lower it, but do you guys not like the immelmann idea?

[Pyro]

I think an Immelmann would be better, It wouldnt be great to lower it anymore. But thats just me and and new at this stuff so do what you like after all it is YOUR coaster. :tmbs V agreed batwing would be better

[coastermaniac]

A batwing would look kick-ass and original. An immelmann is kinda boring to see again.

[rollercoasterfanatic919]

^I would definitely do a batwing, that was one of my ideas, but I don't have enough space. It would hit the wall, thanks though!

Okay, I redid the cobra roll, and I think it looks much better. It still doesn't have enough speed to come close to clearing the second part though. Here are some pictures.

Overview


New cobra roll


Front view


Another view


Back view


Twist


The front of the front car comes right to where my finger is, so it isn't very close to making it.


Give me your opinions & advice, and if you think I should do an immelmann or not. If you have an even cooler element that you think would fit there, post it too!

Comment! Be harsh!

[VV Khan]

Dam man, that sucks. I recommend trying everything possible to get this to work because it looks perfect.

[Jplaz]

Bent Cuban Eight
Bowtie
Butterfly
Cobra Roll
Corkscrew
Cutback
Dive Loop
Diving Turn
Double Corkscrew
Double Dip
Double Heartline Roll
Double In-Line Twist
Fly To Lie
Flying Snake Dive
Heartline Roll
Helix
Hill
Horseshoe
Immelmann
Inclined Dive Loop
Inclined Loop
In-Line Twist
Inside Raven Turn
Interlocking Corkscrews
Jr. Immelmann
Lie To Fly
Lift Hill
Loop
Norwegian Loop
Outside Raven Turn
Pretzel Knot
Pretzel Loop
Quad Heartline Roll
Reverse Sidewinder
Roll Out
Roll Over
Saxophone
Sidewinder
Sky Loop
Tongue
Top Hat - Inside
Top Hat - Outside
Trick Track
Triple Corkscrew
Triple Dip
Triple Heartline Roll
Tunnel
Turntable
Twisted Horseshoe Roll
Vertical Spiral
Wraparound Corkscrew
Zero-G Roll.

I think you've got some choices...

[pkiknex25]

Try weighing your trains if you haven't. Weight and great supports can really do a whole lot. I still think there needs to be less banking in the middle though.

[Mikecoastermaniac]

are you just lettin it go down the pre-drop by itself?
How bout putting it on the chain and actually letting the motor push it down. It might have enough force to get more speed to make the cr.

[RightWayTrey]

Weight and re-lube the trains. If you haven't done either yet I guarentee it will make it.

I'd like to see a zero-g roll somewhere in there. I like them.

Edit: Be sure to lube those trains, even if you did it within the last couple weeks.

[rollercoasterfanatic919]

I have weighted each car with 20 pennies, and none of the supports move much at all. I have installed the 2 ATTV motors, set them on high, and let them push the train over the top, and my finger in the last picture is where it gets to. I actually have it banked at the least it can be in the middle, or else it hits the crossties, and it slows it even more.

I have done pretty much all that I can do to help it, and nothing has done much at all. I am afraid that if I proceed with this cobra roll, I will have to lower it to an ugly height, and I won't have enough speed for the rest of the layout. :sdd

EDIT: ^I just lubed the trains a few days ago. They are also weighted. You're in luck, a zero-g is next!

[Mikecoastermaniac]

drill lift ftw

[Jplaz]

Hows about you ditch the Cobra Roll and do something else?

Such as a wrap-around immelman...