Techie question?? Disney Magic/Wonder

[juniorbugman]

Posted this as a comment to the Mariner of the Seas post but I figured it would be better on its own.


Question # 1 ?? Where and when do the ships refuel, do they have underground pipes that link to the tanks that you can see at the port?? Also how much fuel??

Question # 2 ?? Has anyone seen how much the Magic or Wonder settle when they are full and when they are empty?? They have depth marks on the front of most ships to see how much weight they carry.


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[MarkRG]

#1 At Port Canaveral a tanker barge docks to the ship on the opposite side from the dock and refuels via hoses. No idea how much fuel, but I'm sure it's a very large amount.

#2 Don't remember seeing such markings on the Magic or Wonder. Also their loading/unloading process is more or less parallel so the weight change won't be that significant as they unload all trash from the cruise and Castaway Cay at Port Canaveral while bringing on fresh supplies via skids on forklift.

 

[Verandah Man]

http://community.webshots.com/photo/89361191/89363899AGXrYF

The above link will take you to a photo that I took of the refueling barge that was headed to the Magic at the end of our cruise this past August. As Mark said, this barge pulls up alongside the Magic and the Wonder and takes a few hours to refuel the ships. Sometimes you can see the barge alongside the ships on the port cam.

 

[HooKooDooKu]

Also how much fuel??

I don't know how much fuel they load, but I do remember from one of the "behind the scence" sort of thing on the Magic one year the crew said that the ship's fuel consuption is about 12"/gal. Yes, that's 1 foot for every gallon of fuel.

 

[juniorbugman]

The barge does not seem to be that big in the picture.

But that figure of 1 foot per gallon I have do some math,

5,280 ft times 1 gal = 5,280 gal per mile times 1400 miles round trip eastern = 7,392,000 gals times 6 pounds per gal = 44,352,000 pounds divide 2000 lbs per tonne = 22,176 tonnes.

This math stuff will drive you crazy. That is a lot of fuel, about one quarter the weight of the Magic.

No wonder it costs so much to cruise.

 

[Verandah Man]

Remember a nautical mile is 6,076 feet not 5,280 feet like a land mile.

 

[juniorbugman]

I'm not doing the math again !!

 

[HooKooDooKu]

Remember a nautical mile is 6,076 feet not 5,280 feet like a land mile.

And for those of you who wonder why is a nautical mile longer than a land mile, I believe the answer is that 1 nautical mile = 1 arc minute at the equator because ships navigate based on logitute and latitude. And for those who don't know what an arc minute is, there are 60 arc minutes in one degree (360 degrees in a full circle).

As a quick test to verify this, I seem to recall that the earth is about 8,000 miles in diameter (land miles). 8,000 miles * 3.14 (the magical number to determine the circumference of the earth) is 25,120 miles = 132,633,600 feet = 21,829 nautical miles

60 arc minutes in a degree, 360 degrees in a circle = 21,600 arc minutes in a full circle.

21,600 v. 21,829, sounds about right for a starting point of "earth is ABOUT 8,000 miles in diameter".