capacity

blu by you · Post by **blu by you** » Sun Aug 07, 2011 4:57 am

here is a formula used by the cg lenth of boat ties width divided by 15, i found this in a book called fundementals of sailing by gary jobson

Paul · Post by **Paul** » Sun Aug 07, 2011 1:35 pm

expound on the formula a little more please. For my 22', with an 8' beam, this yields 11,... but 11 what?

mcrandall · Post by **mcrandall** » Sun Aug 07, 2011 3:01 pm

That's presumably peeps on your boat, Paul. Thoughts of that new nav marker you spoke of this past winter comes to mind....

Alanhod · Post by **Alanhod** » Sun Aug 07, 2011 3:26 pm

I too need some clarification please. Check my math here

C-22
22 x 7.75 = 170.5

187 / 15 = 11.3 People

C-26
26 x 8 = 208

208 / 15 = 13.8 People

I must be doing this wrong. I'm thinking half that many people. More Like 6 people max on a C-22 and maybe 8 people on a C-26.

Now I know my C-22 is suppose to sleep 5 as I recall and this would leave one on watch while the other 5 slept.

And the C-26 sleeps 6 then they could have maybe 2 people on watch while the rest slept.

J. Austin · Post by **J. Austin** » Sun Aug 07, 2011 4:14 pm

I think maybe there is a bit more to the equation. Ie: ballast, displacement, wetted surface. The amount of weight that makes a boat unstable on the topsides, versus the amount of persons down below. My plate on my stern says 6. This, I am told, usually equates to 200 lbs per person. Add 750lbs for gear, fuel, rations and a motor, and your at a ton. Plenty for my taste.
It is also my understanding that in Dec. Of this year this calculation will be changed due to the change in Coast Guard STD. Persons weight of 145lbs to 185. See link:
http://coastguardaux.com/f9_11/Capacity ... c5153e0e54

Ps. This calculation only applies to boats under 20 feet. Ie: dinghies, etc.

Paul · Post by **Paul** » Mon Aug 08, 2011 2:51 pm

Yea, also the calculation needs to add one additional head for each 5 people.

J. Austin · Post by **J. Austin** » Mon Aug 08, 2011 6:35 pm

Good call Paul, although maybe 1 in 3 if they're chicks!

blu by you · Post by **blu by you** » Tue Aug 09, 2011 7:40 am

that is people , there is a caveat, in calm weather ......i guess if the weather gets bad you have to throw some friends overboard.......you wont see 11 people om my c 22

Bhacurly · Post by **Bhacurly** » Tue Aug 09, 2011 8:12 am

Couple years ago we had 7 adults on my 22,

Guessing wts now maybe 1250 lbs. I knew my keel wt of 850 lbs and boy could I feel we were top heavy. It was a calm day and we just motored, slowly. There was an exagerated roll motion that Pam an I noticed.

I definately wouldn't want to be sailing or have any waves present with that many people unless you were ready to get wet! Next time we'll do turns and leave a few folks safely at the marina...

Billy

lecker68 · Post by **lecker68** » Tue Aug 09, 2011 5:44 pm

I agree and you won't see 13 on my 26. Well maybe at the dock and 10 are chicks.

hp18carr · Post by **hp18carr** » Wed Aug 10, 2011 5:06 am

Sadly as one grows older... one's personal capacity seems to grow. Speaking only of myself of course.

Terrence
Wilmington N.C.
Chrysler 26' 1980
Pandora (for now)

lecker68 · Post by **lecker68** » Wed Aug 24, 2011 5:37 pm

Terrence I tend to agree my spare tire around my waist that used to be a space saver is now a full size.

38 special · Post by **38 special** » Thu Aug 25, 2011 7:31 pm

If I had ten women show up to get on my boat like Lyle you better belive I would take them out.

Paul · Post by **Paul** » Thu Aug 25, 2011 8:24 pm

38 Special, you can take them out, but does that mean you have to buy them dinner?

Just askin'

38 special · Post by **38 special** » Sat Aug 27, 2011 7:40 pm

Of corse I would feed them, it's Wisconsin, they would get brats and since I'm originaly from Alabama they would get a side of grits and some sweet tea. What women could resist that?