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View Full Version : How fat is my FatSac?

mcdye
03-03-2009, 10:49 PM
Well I am taking advantage of the cold weather and learning the in and out of the new to me ride.

I have 2 rear FatSacs, they are about 68"L x14"Wx8"H. They have a number on them of 112706101670. How much weight are they?

There are no numbers or name on the front sac. It is more of blue ballon in a gray bag. I has the ends ln it like a water bed.

TIA

newty
03-03-2009, 11:11 PM
400lbs. Those are the factory Grav 3 locker sacks in the newer LSV's

mcdye
03-03-2009, 11:19 PM
Sorry I just realized I started thread in the wrong section...

Is that 400 each?

04OUTBACK
03-04-2009, 08:32 AM
yep.. 400 each
The last few digits on that number denote the size.
10x16x70

yearround
03-04-2009, 09:48 AM
04 has it, but as an engineer, i gotta expand! :)

multiply 10x16x70 =11200 in^3.
11200/1728 = 6.5 cubic feet
6.5ft^3 * 62.4 lb/ft^3 = 404 lbs

kaneboats
03-04-2009, 09:56 AM
What? Not down to the ounce?

sandm
03-04-2009, 10:05 AM
guess now I have to go to the gym since my gravIII system is actually 1212, not 1200lbs and I can lose that last 12lbs.. :(

yearround
03-04-2009, 10:49 AM
well, what ever it takes, i weigh myself the other day, was right on the line for "clydesdale" category in a race. i won the category! but on the other hand, i would have taken 3rd in my correct AG.

so kane, ounces are not important, its how you win the race :o

sandm, you gotta realize that there is always a bit of air in the bag, so you still only have 1200

mcdye
03-04-2009, 12:34 PM
Thanks guys,

any idea to get the weight the front one besides fill it up at the weight station.

yearround, if i took a picture of it can you do the math :) j/k

yearround
03-04-2009, 01:02 PM
sure, just make sure the picture is close up of the stamped model serial number. the last six numbers are the dimensions of the bag. then i can do the math, or walk you through it:)

04OUTBACK
03-04-2009, 02:03 PM
yearround,
I am in sales. That means we use generalizations and don't worry about the details. We only know enought to sell it and turn the order and wait for someone else to take care of the details! HA

sandm
03-04-2009, 04:05 PM
sandm, you gotta realize that there is always a bit of air in the bag, so you still only have 1200

nice. now I can sleep in again :)

mcdye
03-04-2009, 08:13 PM
yearround,

Pictures would not do any good on the front sac. As it has nothing, any where on it. I do have me measurements if you care to get your slide rule out. This one is like a barrel, I measured the seams, it 32" long and has a diameter of 16". It has 2 waterbed type hook ups on end and a vent at the at the other end. It was stuffed in a grey sack with a smaller zipper on it. It too had nothing on it.

TIA

yearround
03-05-2009, 09:59 AM
yahoo!
volume of a cylinder is pi*D^2*H/4
3.14*16^2*32/4 = 6430 in^3
6430/1728 = 3.7 ft^3
3.7*62.4 #/ft^3 = 230 pounds
dropped a few decimals for the sales guys, want to ensure that some people still sleep well.

kaneboats
03-05-2009, 10:06 AM
No opinion on this from the Z's? I'm surprised they could resist.

mcdye
03-05-2009, 10:20 AM

As my family are beginners in the surf arena. Is this enough weight to give it a try based on my boat (2002 OB LSV) and 400 on driver side (I would guess to get extra driver weight) and the 230 in the front? It would appear that I may be to stuff the other 400 in the front...as stated we are newbies..

No opinion on this from the Z's? I'm surprised they could resist.

I am confused..:confused:

kaneboats
03-05-2009, 11:59 AM
I believe zegm and Mrs. Z are both engineers.

Check the wakesurfing forum for info on ballast. I'm sure somebody has your boat.