The fins stregthen the weld joints. Nothing to worry about, I just don't know why they didn't do it in the first place. You may recall that some Xcelerator pieces were modified as such before the ride was even finished.
------------------ Jeff - Webmaster/Admin - CoasterBuzz.com - Sillynonsense.com "The world rotates to The Ultra-Heavy Beat!" - KMFDM
Jeff is partially right. It is to increase the capacity of force transfer from the smaller diameter to the larger diameter pipe. The fins transfer some of the axial load from the top pipe into the lower, thereby reducing the bearing stresses and decreasing the demand on the weld between the two pipes.
If it were only a weld strength issue, and not a bearing one, odds are they would just hire a welder to make a few more passes between the two pipes rather than spend the extra money fabricating and welding all of the fins.
What I don't understand is why Intamin keeps having to fix weak areas of track on many of their coasters. Shouldn't tests be done on stress of the track before it is built? And if they are testing why do they have to keep fixing their track, shouldn't they be able to calculate how strong the track and supports need to be before they construct a ride?
They put them in the safari for the monkeys to climb on :) ------------------ - "I used to be in the audio/visual club, but I was kicked out because of my views on Vietnam........and I was stealing projectors" - Homer Simpson
Heck, all three Arrow "mega loopers" had their vertical loops replaced.
They did? Even Viper? No way. I had no idea. What did they do? Are those little cross support things in the first vertical loop the change they did? Was the first loop the only ones they replaced or were all three replaced? Do I have any more questions? Find out later. ;)
------------------ I was asked to describe X in one word. The word? -- OhmygoshwhathaveIgottenmyselfintothisisthescariest thingintheworldhelpmeIamgoingtodieAHHHH!!!
Yeah, the intricate crosswork on the top of the loops are new on all of them. I have pictures where it was just "normal" Arrow track.
edit: I just looked and I have pics with the old loops, and pics from 97 with the new ones (on Viper) So, it had to be before then....
------------------ - "I used to be in the audio/visual club, but I was kicked out because of my views on Vietnam........and I was stealing projectors" - Homer Simpson *** This post was edited by Peabody 3/4/2003 8:42:02 PM ***