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capacity

Posted: Sun Aug 07, 2011 4:57 am
by blu by you
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

Posted: Sun Aug 07, 2011 1:35 pm
by Paul
expound on the formula a little more please. For my 22', with an 8' beam, this yields 11,... but 11 what?

Posted: Sun Aug 07, 2011 3:01 pm
by mcrandall
That's presumably peeps on your boat, Paul. Thoughts of that new nav marker you spoke of this past winter comes to mind.... :shock:

Posted: Sun Aug 07, 2011 3:26 pm
by Alanhod
I too need some clarification please. Check my math here

C-22
22 x 7.75 = 170.5

187 / 15 = 11.3 People :shock:

C-26
26 x 8 = 208

208 / 15 = 13.8 People :shock:

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

Posted: Sun Aug 07, 2011 4:14 pm
by J. Austin
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.

Posted: Mon Aug 08, 2011 2:51 pm
by Paul
Yea, also the calculation needs to add one additional head for each 5 people. :wink:

Posted: Mon Aug 08, 2011 6:35 pm
by J. Austin
Good call Paul, although maybe 1 in 3 if they're chicks!

capacity

Posted: Tue Aug 09, 2011 7:40 am
by blu by you
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

Posted: Tue Aug 09, 2011 8:12 am
by Bhacurly
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

Posted: Tue Aug 09, 2011 5:44 pm
by lecker68
I agree and you won't see 13 on my 26. Well maybe at the dock and 10 are chicks.

Posted: Wed Aug 10, 2011 5:06 am
by hp18carr
Sadly as one grows older... one's personal capacity seems to grow. Speaking only of myself of course. :evil:

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

Posted: Wed Aug 24, 2011 5:37 pm
by lecker68
Terrence I tend to agree my spare tire around my waist that used to be a space saver is now a full size.

Posted: Thu Aug 25, 2011 7:31 pm
by 38 special
If I had ten women show up to get on my boat like Lyle you better belive I would take them out.

Posted: Thu Aug 25, 2011 8:24 pm
by Paul
38 Special, you can take them out, but does that mean you have to buy them dinner?

Just askin'

Posted: Sat Aug 27, 2011 7:40 pm
by 38 special
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?