V2 makes weird noises

Mr. Freeze makes a cool noise too, it sounds like the nosies you all have explained.

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Mr.Freeze Laps :27 (sfot)

I think all LIM/LSMs make the screaming noise during the launch...at least FoF did...I love that noise..

Then I guess I'm glad that Hulk used tire launch instead of LIMs. If there was a screaming noise, it would have disrupted the themeing of Dr. Banner's fateful line "I think it's going to work this time!"
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I rode "X" and never went upside down.

There is also another wired noise Mr.Freeze makes. Once the platform the train is on moves into its launch postion, it makes this noise under the train that sounds like air shooting at each car once, then it makes that boom like noise and launches. Does anyone know what that noise is ?

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Titan Laps :16

If I remember correctly (remember I've not seen Mr. Freeze in person) there are conventional pneumatic brakes on that one. Those all have to be put out of commission before launch or it's gonna be a real short trip. (anybody know what movie I am thinking about??)

Yes, the LIMs make a screaming noise. Ever notice that an electric motor will make a 60-Hz humming noise? Ever notice that the noise is significantly louder when the motor is stalled or at startup? Notice also that the noise is more noticeable when the motor is not operating at its synchronous frequency...that is, while the motor is starting up.

LIM catapults make the same noise, but it's a high-pitched squeal because the LIMs operate at high frequency. It will tend to be particularly noisy on a ride like VV or S:UE when the train is parked in the station because at that point, the field is being deliberately oscillated at varying frequencies and directions (those are three-phase motors so direction is critical) to precisely position the train.

--Dave Althoff, Jr.

When I was waiting in line for V2 I was noticing the samething was that people screaming or the noises of the LIMS? After waiting in line for about an hour I finaly figured it out it was the noises of the LIMS.
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9 Years Working at Valleyfair
13Hours From Cedar Point

RideMan said:
"If I remember correctly (remember I've not seen Mr. Freeze in person) there are conventional pneumatic brakes on that one. Those all have to be put out of commission before launch or it's gonna be a real short trip. (anybody know what movie I am thinking about??)"

Yes, Mr. Freeze (and Chiller) has the *regular* pneumatic fin brakes. You can feel them opening up under the train (it was *really* noticeable on Chiller).

Yes. Star Wars, Han Solo referring to Obi Wan Kenobi and the Death Star's tractor beam.
lata,
jeremy
--who thought Princess Leia was so hot...

Something I noticed. FoF's launch was much louder and lower pitched than S:UE, which was much more of a squealing sound. Is it just the difference in the manufacturers?

Most likely a difference in the design of the motor winding, and in the controller used. I noticed yesterday that the motors on Volcano appear to be quite different from the ones on Flight of Fear, shorter and stockier for starters. I suspect that the Premier LIMcat may be using a largely uncontrolled 60-Hz 3-phase LIM while Intamin, using some of what they learned on Superman: The Escape may be using a high-frequency drive to get more force out of less motor. It's just a guess, mind you, but it seems to make sense... :)

Jeremy: Yup, that was the one. :)

--Dave Althoff, Jr.

If you sit in the back seat of SUE you can hear the LIM's scream as the train accelerates backwards through the station.

I love that sound. "SCRE SCRE SCRE SCRE SCRE SCRE..." or something like that...lol.

http://www.force.co.uk/

SFGRAMBoy20 said:
when you are the next people to get on...listen for the LIM noise. You hear is on the launch, you hear it going backwards, forwards, backwards again, BUT you don't hear it on the last time forwards because they aren't needed as the train is being slowed for the final stop. IT IS THE LIMs. :-)

technically, aside from natural friction, the train isn't really being *slowed*, it's just not being accelerated.

cocky....that is what I meant...the train is being slowed due to friction because the lims aren't there to accelerate it...so obviously it will be getting slowed down by that process.

SFGRAMBoy20 said:
cocky....that is what I meant...the train is being slowed due to friction because the lims aren't there to accelerate it...so obviously it will be getting slowed down by that process.

when stating that the ride is forcibly accelerated by lims, an inference that the ride is forcibly being decelerated is not a difficult one to take from the statement "the train is being slowed for the final stop." i was simply clarifying for any who would therefore assume the lims to have a hand in the train's "deceleration" on the final trip forward.

I stated you don't hear the lims because they are not needed. You would hear the lims if they were being used to decelerate the train. But thank you for clarifying for the people that can't read correctly...

On Speed: The Ride they have both pnuematic brakes and a line of magnetic brakes that act on the same fin. When the pneumatic brakes open the "white line" of magnetic brakes lowers at the same time. On your trip out of the station and through the second launch area they stay down. Once the train reaches a certain point the brakes lock and "line" raises back up. This "white line" is also on the spike but dont move. They are just there to slow the train if it gets too close to the top. Normally just the front car will touch these, but it all depends on train weight and wind speed.
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"ok everyone go ahead and pull down on your shoulder restraint so you feel nice and stuck!"

hogfat said:
"when stating that the ride is forcibly accelerated by lims, an inference that the ride is forcibly being decelerated is not a difficult one to take from the statement "the train is being slowed for the final stop."

Okay, I didnt really have anything to say on your comment, but I just wanted to say I love your screen name!
jeremy
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"Nobody writes about the planes that land." Steve Salerno Washington Times 7-10-01