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Old 01-10-2013, 03:28 PM   #106
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Originally Posted by JeRmS View Post
Meh I guess, but I don't see how my 48 1/4" daughter is more safe on that ride than my 47 3/4" daughter?

but alas, not to start an argument on that subject we will just keep riding EE anyway since it's waaaaay more fun than PEW.
I doubt it is, but I don't know, as I did not design the ride. In reality, the cut off point has to be somewhere, right? And they can't come out and say "You have to be around 44" to ride, we will guesstimate when you are there."
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Old 01-10-2013, 03:38 PM   #107
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Just checking the book 'Stories from a Theme Park Insider', the author, a former cm mentions what is the 'safety brake' which is in certain parts of the track, to stop the trains, spinny things or whatever they're called on primeval whirl from running into one another.
Apparently the safety brake can stop a vehicle running upto 30 miles an hour in eight feet, resulting in a hard, hard stop. It is the one thing you do not want to hit if you are shorter than the height requirement for that ride, or are pregnant, have a back, neck or heart condition.
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Old 01-10-2013, 03:41 PM   #108
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Old 01-10-2013, 03:42 PM   #109
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Originally Posted by JeRmS View Post
Meh I guess, but I don't see how my 48 1/4" daughter is more safe on that ride than my 47 3/4" daughter?

but alas, not to start an argument on that subject we will just keep riding EE anyway since it's waaaaay more fun than PEW.
That's ok. You don't have to. That's why Disney sets the limits. There has to be a cutoff somewhere. You have to be 16 to drive. That's not saying that someone who's 15 3/4 can't drive. A cutoff was established for safety and that's how it is.

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Old 01-10-2013, 03:42 PM   #110
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Originally Posted by JeRmS

Yes of course the cutoff poin has to be determined, but I think Disney should rethink some of their requirements, there are 3 rides within 4 parks that have requirements higher than 44" ...

Space Mountain - everyone can probably agree here, it's dark and the rider has to sit alone, not even sure I'd let my 48 1/4" Daughter ride this right now, heck I'm 5'10 and get scared in there!

RnRC - considering the 0-60mph takeoff in 2.7 seconds and the immediate loop I can see the need for a height requirement

and then we have ...

Primeval Whirl - The ride has a heighest peak of maybe 30 feet, and does a couple high speed "whirls" around corners.

No way the latter of the 3 compares to the others when it comes to safety.

again I'm not trying to start anything here, I guess I just don't understand where this ride in particular was given a 48" requirement.

Likely recommended by the ride designers. I don't think anyone here can actually answer your question.
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Old 01-10-2013, 05:11 PM   #111
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Originally Posted by JeRmS View Post
Primeval Whirl being 48" makes absolutely no sense to me .. my DD5 was so upset that she couldn't ride, she barely missed it but she could ride the big mountain (Expedition Everest)

I'm not sure how Primeval Whirl is more "Thrill" than EE and therefore would require a larger height requirement?
Its has to do with ALL the forces that a body must be able to handle. EE has mostly positive and negative, up and down, G forces and a small amount of side to side G forces due to banked curves.

Primeval Whirl has about the same, probably less, positive and negative G forces but considerably more side to side forces since while you are going slower does not have banked curves. The spinning of course just adds to the overall forces.

Up and down forces are easier to design for since you are mostly being pushed into seat with sometimes you felling like you are being pushed out of your seat like at the top of a hill. In the roller coaster world this is called "Air Time". Most coasters have a lot more pushed into your seat forces versus air time.

Side to side forces are harder to deal with since they are pushing you OFF your seat to the side, AKA being thrown out of your seat.

Thats why some rides that seem more "tame" have higher height requirements.

At my home park, Kennywood, the Hyper coaster, The Phantom's Revenge goes 85 mph and drops 228' and has a 48 inch height requirement. The older slower (55 mph, 95 foot drop) Thunderbolt has a 52" limit due to its greater side to side forces.

Note I am not a ride designer nor do I play one on TV. Though my sons and I have played Roller Coaster Tycoon for more hours than we want to admit and at one time my oldest wanted to be a roller coaster designer. Decided Chemical Engineering was better but is now a Math major.
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Last edited by chartle; 01-10-2013 at 06:24 PM.
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