Jump to content
  TPR Home | Parks | Twitter | Facebook | YouTube | Instagram 

The Six Flags Magic Mountain (SFMM) Discussion Thread

Page 2228 - Wonder Woman Flight of Courage REAL POV!

Recommended Posts

 

So a LIM is essentially the same thing but is only "magnetised" when power is applied. And why can't LSMs launch straight out of the station and LIMS can. I read somewhere that the train has to be moving for LSMs to launch. Is this true?

 

I've taken a class in electromagnetic conversion, essentially a motor engineering class....but it's been awhile. =P

 

 

Actually both can't be started from a stand still, but with some clever wiring it is possible . You can just change the poles on the stator(not moving part) so it repels rather than attract.

 

Typically LSMs have permanent(doesn't always have to be permanent) magnets on the moving body(rotor), and induction does by "inducing" an opposing field on a nearby magnetic material. You see induction work with chargers that don't use wires, like those charging pads.

 

 

If you were wondering why it's called a Linear "Synchronous" motor, because the motors run in sync with the AC freq. So if you hooked up a crude synchronous motor to your home outlet, the motor should spin at 60hz. Of course there are other factors involved so you can adjust the frequency but that gets way to complicated.

Link to comment
Share on other sites

I just wish that Riddler's Revenge had the same station of Batman. Batman's station impressed me since it was pretty spacious and has that high ceiling while Riddler's station is like an overcrowded office.

 

Does anyone know why that air conditioner has NEVER been on before?

 

The Ice Queen likes it hot.

 

Yea, you got it...

Link to comment
Share on other sites

Hey guys,

 

Does anybody know why Magic Mountain is open on Wednesday, September 26th? I have never been to California before and am considering planning my trip to use this Wednesday as my day at Magic Mountain since they are only open on weekends. Would you recommend going on this day versus that Saturday or Sunday? Thanks.

 

Doug

Link to comment
Share on other sites

Hey guys,

 

Does anybody know why Magic Mountain is open on Wednesday, September 26th? I have never been to California before and am considering planning my trip to use this Wednesday as my day at Magic Mountain since they are only open on weekends. Would you recommend going on this day versus that Saturday or Sunday? Thanks.

 

Doug

 

Its a LAUSD Unassigned day No School for Students and Staff (Holiday) and on SFMM main page on right hand side they boast they are open school holidays (under weekend tab). Not sure it will play to huge turnout as all Santa Clarita schools are in session so might be late arrive crowd after SCV schools start letting out around noon.

Link to comment
Share on other sites

I hate to be the guy who asks a million questions. But does anyone know the difference between LSMs and LIMs?

 

The image below is the best description I've ever found reguarding the difference between LIM and LSM magnetic propulsion. Everyone can try and impress you with college terms, big fancy words and technical jargon but as far as actually understanding how they work: this takes the cake.

 

From a reliability standpoint, LIMs do the job. There's only one path they follow and they all fire in line. But as you can see (referring to the numbers on the image) they take a high amount of power each cycle. Costly.

 

LSMs or Synchronous motors are a bit more complicated (although these days with computers they're much easier to control) but take up much less power (referring again to the diagram) but require you to fire off the magnets "in sync" with eachother. These magnets are required on a ride like Superman at Magic Mountain because they both control the launch speed and the decceleration. This type of electromagnetic control was amongst the first of its kind on Superman, which, most of us know, plagued it with downtime. The synchronization is so precise that any kind of faulty speed or loss of car location caused a launch or return failure, resulting in magnets shutting off, and friction e-brakes at the end of the launch or behind the station stopping the car. Most novice visitors of the park are familiar with such events occuring on Superman.

 

 

 

Link to comment
Share on other sites

That's a nice graphic, but it's completely wrong.

 

The LSM part is correctish. The electro-magnets behind and in front of the train push/pull big heavy permanent magnets on the train. The downsides are that, as mentioned above, the timing has to be very precise, and because you have to know exactly where the magnet on the train is, you can't have more than one magnet on a train. That's why most LIM rides are either a single car (Superman at SFMM) or use a sled to push the car (Rock'n'Roller Coaster).

 

In LIMs, the electromagnets pulse in a wave, turning on and off in series like chaser lights:

Conductive aluminum or copper plates on the train, through the magic of magnetic induction, try to keep up with this wave, accelerating the train to just under the speed that the wave is traveling. You don't really need to know where the train is, although most LIM launched rides closely monitor train position so that they can only put power to the electromagnets near the train and save electricity.

Link to comment
Share on other sites

Based on your post I can't seem to find a description where you've differentiated LIMs or LSMs much differently than I have (although I suppose that blinking light graphic is a nice touch). I'm also not sure when "correctish" became a technical term. It might also be fitting to notice you neglected to come up with a description most people would understand, or a source that proved the nice graphic I shared was, in fact, "completely wrong."

Link to comment
Share on other sites

That's a nice graphic, but it's completely wrong.

 

The LSM part is correctish. The electro-magnets behind and in front of the train push/pull big heavy permanent magnets on the train. The downsides are that, as mentioned above, the timing has to be very precise, and because you have to know exactly where the magnet on the train is, you can't have more than one magnet on a train. That's why most LIM rides are either a single car (Superman at SFMM) or use a sled to push the car (Rock'n'Roller Coaster).

 

In LIMs, the electromagnets pulse in a wave, turning on and off in series like chaser lights:

Conductive aluminum or copper plates on the train, through the magic of magnetic induction, try to keep up with this wave, accelerating the train to just under the speed that the wave is traveling. You don't really need to know where the train is, although most LIM launched rides closely monitor train position so that they can only put power to the electromagnets near the train and save electricity.

 

Yeah has always been my understanding... Also its pretty cool fact I just learned about Rock'n Roller Coaster.... I was wondering how they got LSM to work on that ride. Do you have any links that show this "sled" ... Does it work like a catch car but it has a permanent magnet on it?

Link to comment
Share on other sites

Based on your post I can't seem to find a description where you've differentiated LIMs or LSMs much differently than I have (although I suppose that blinking light graphic is a nice touch). I'm also not sure when "correctish" became a technical term. It might also be fitting to notice you neglected to come up with a description most people would understand, or a source that proved the nice graphic I shared was, in fact, "completely wrong."

 

My nomination for Doucheiest post of the month. But you may be able to argue that "Doucheiest" isn't a technical term.

Link to comment
Share on other sites

Douchy or not, I kind of agree that the explanation with the chaser lights wasn't very well explained. I didn't quite get the difference he was describing between LIM and LSM. The simple graphic made sense to me, but apparently that's all wrong. Bummer!

Link to comment
Share on other sites

That's a nice graphic, but it's completely wrong.

 

The LSM part is correctish. The electro-magnets behind and in front of the train push/pull big heavy permanent magnets on the train. The downsides are that, as mentioned above, the timing has to be very precise, and because you have to know exactly where the magnet on the train is, you can't have more than one magnet on a train. That's why most LIM rides are either a single car (Superman at SFMM) or use a sled to push the car (Rock'n'Roller Coaster).

 

In LIMs, the electromagnets pulse in a wave, turning on and off in series like chaser lights:

Conductive aluminum or copper plates on the train, through the magic of magnetic induction, try to keep up with this wave, accelerating the train to just under the speed that the wave is traveling. You don't really need to know where the train is, although most LIM launched rides closely monitor train position so that they can only put power to the electromagnets near the train and save electricity.

 

I understand this, but that "christmas light" graphic seems to work exactly like a LSM. Explain?

Link to comment
Share on other sites

Im guessing no one read what I wrote lol.

 

A linear motor is essentially a regular rotating motor laid out flat.

 

Some definitions

 

Stator - part that stays stationary

Rotor - part that moves

 

 

Both systems work on the push/pull concept. Induction motors require "slip" to produce torque, where the rotor moves at a different frequency than the stator. Sync, is the opposite, where the rotors moves at the same freq has the stator.

 

Ex: Household voltage is 60hz, meaning a sync motor would run at 60hz(this can be varying using other factors).

 

Note: They both are AC motors

 

Induction

-Requires Slip

-Stator is electromagnet

-Rotor becomes magnetized through eddy currents induced by the stator

 

 

Sync

-No slip

-Stator electromagnet

-rotor permanent magnet

 

 

Linearly they both work the same. Theres other technical advantages/disadvantages, but it would be hard to put it in layman terms lol.

Link to comment
Share on other sites

LIMs are more reliable than LSMs however not nearly as efficient because all stators are energized simultaneously regardless of vehicle position. LSMs are a lot more efficient as only the stators that are needed for vehicle movement are energized in synchronization with vehicle position.

However, LSMs are more prone to down time due to "drive trips/errors." (Synchronization issues)

 

^This.

Edited by DJeXeL
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

Terms of Use https://themeparkreview.com/forum/topic/116-terms-of-service-please-read/