Rock 'N' Roller coaster help

[DisJosh]

It's actually not a cobra roll. It's an immelman immediately followed by a dive loop, a combination which Vekoma calls a roll over (B&M calls it a sea serpent). The train exits the inversions travelling in the same direction as when it entered. Cobra rolls act as turnarounds, with the train heading back the opposite direction from which it entered.

Cobra rolls send you back in the direction you came from...which I'm assuming you meant. The combo of the immelman and dive loop make sense. The set up still resembles a cobra roll though...I just never considered the fact that if it were it would be sending me in a diferent dirrection than RnRC does. It all makes sense now.

Anyone have pics of the track? Specifically the first two inversions area?

 

[coasterphil]

RCDB is your best friend for basic facts about every coaster in the world. Here is a picture of what the ride looks like, so you get a clearer picture. http://www.rcdb.com/ig769.htm?picture=2

^^^^^^^^

Along with the others in the ride's gallery. http://www.rcdb.com/ig769.htm

 

[Thrawn]

If you look through the RnRC info here on WDWmagic's main site, there are construction photos, as well.

 

[TurboCaroline]

I've seen the construction photos but I would enjoy seeing the track upclose and personal!! Please show your pictures... Thanks

 

[marni1971]

The launch system uses linear induction motors. Disney first used them on WEDway Peoplemover out in Disneyland.

Sounding like a geek - RnRc use Linear Synchronous motors, not LIM`s. Disneylands Peoplemover didn`t have any magnetic propulsion - it used motorised tyres embeded in the track every few feet to roll along the underside of the cars and propel them.

WDW`s WEDWay opened July 1st 1975 and used LIM for propulsion. Charged plates in the track bed act as a magnet, pulling the car, which has a metal plate on its underside, towards it. Once the car has passed, the polarity switches to give a little extra push away. Interestingly, the WEDWay can still operate at full efficency if 40% of the LIM`s are out of action. A similar system was installed at Houston Airport in 1978 by a spin off company from WED Enterprises.

Rock n Rollercoaster uses LSM`s arranged in two rows, either side of a groove along ther launch track. Unlike IOA`s Hulk, there is no direct connection with the magnets and train. A carriage runs along a track underneath the launch track with a vertical fin - this fin sits between the LSM`s and it is this that is pulled. The carriage connects to the ride car and in turn propels it. You can feel the jolt of the carriage connecting just beofre launch. After launch you may be able to see the carriage returning down the launch trackfor the next car.

The Hulk at IOA connects directly to the car - hence the slow start out of the station into a launch with no pause. I also think (check first!) DCA`s California Screamin` uses LSM not just to launch but also for braking.

Here is a pic of the carriage on RnRC, returning up the track:

 

[ogryn]

Hulk doesn't use magnetic propulsion, the tires literally push it up the hill (as seen in this picture from RCDB).

Also, California Screamin' is different to Rock 'n' Rollercoaster as the trains themselves are pushed by the magnets, not a "trolley" system. CS is still LSM though. I would imagine CS also uses magnetic brakes, as Intamin do like that technology on thier coasters, and unless the poles of the earth change that train is going to stop.

<img src="http://photoalbums.wdwmagic.com/data/500/caliScream1.jpg"/>
<img src="http://photoalbums.wdwmagic.com/data/500/caliScream2.jpg"/>

Someone over on ThrillNetworks board explains the difference between LIM and LSM

It's hard to explain LIM and LSM without getting into the really messy details, but I'll take a stab at it. Induction motors induce low voltage but high current into a conductor within it's feild. This creates an opposing magnetic feild moving, the fin moves and the coil is held in place. The faster the fin moves, the more inductive reactance it created opposing the line current comming from the power source. you can think of the feild moving fast and the fin is trying to catch up. In the end, this lowers the amount of push that the coils gives to the fin. Synchonous speed is the point where there will be no push on the fin at all.

The difference in LSM is that the fins are replaced with magnets. Ths means that there is already a feild for the coil to push against and the fin will be allowed to travel exactly with the coil feild. Slighly better control over the speed.

Hulks launch is more like a fast tire drive lift than a launch. It's pretty weak compared to other launch types. It goes from about 4-40 MPH in 2 seconds. The only reason I can think of that the park needs to store energy is very limited line draw restriction.

 

[marni1971]

Hulk doesn't use magnetic propulsion, the tires literally push it up the hill

Aha