[C38] PHRF rating versus actual displacement?

[Les]

One of the haulouts prior to the hull change, and with all our cruising
gear aboard, I was told JACE's weight was 16800.  With our estimated
water plane at 312 square feet, that works out to 2.1" greater draft.

After the hull job, our draft appeared to lift about 1" or about 1200
lbs.  I'll check on the next haulout if the crane operator has a
measurement capability there.

Regards,
Les H
On Tue, 2010-01-12 at 10:41 -0800, Steve Smolinske wrote:
> The original IOR Certificate for our boats lists them with displacement
> of 13,356 
> 
> -----Original Message-----
> From: listserve-bounces at catalina38.org
> [mailto:listserve-bounces at catalina38.org] On Behalf Of
> ssorton at sbcglobal.net
> Sent: Tuesday, January 12, 2010 9:47 AM
> To: glenn at easternyachtri.com; Catalina 38 Listserve
> Subject: Re: [C38] PHRF rating versus actual displacement?
> 
> Glen,  Part of the displacement increase maybe due to gel coat that was
> used on almost all fiberglass boats of that time period.  My hull was
> built the last part of '84 with a polyester gel coat system that
> included a fire retardant.  This system proved to greatly enhance the
> growth of blisters.  I like to race and at haul out every 2-3 years I
> couldn't sand the old paint without breaking through the blisters.
> Every broken blister had to be recoated with epoxy- I had hundreds and
> hundreds of them.  After going through a couple of haul outs repairing
> blisters, I had the bottom pealed (removing all gel coat below the water
> line- about 1/8th of a inch), and replaced with a vinylester gel coat
> system.  Vinyslester system is used on all modern fiberglass hulls.  The
> result was no more blisters and the boat floats a good inch higher- not
> measured though, just visual.  I also believe the boat is dryer on the
> inside.  The bottom line on all this is I believe our hulls can soak up
> a lot of water/weight, which could explain some of the weight
> deferential between PHRF and actual.
> Cheers, Steve Orton (hull #304)
> 
> -----Original Message-----
> From: listserve-bounces at catalina38.org
> [mailto:listserve-bounces at catalina38.org]On Behalf Of Glenn 401 855 4355
> Sent: Friday, January 08, 2010 11:34 AM
> To: listserve at catalina38.org
> Subject: [C38] PHRF rating versus actual displacement?
> 
> 
> 
> 
> Has any one compared their actual displacement figures with the factory
> specs?
> 
> I own hull number 13, POIA, here in New England.  Have owned her for
> almost 12 years.
> 
> I have the feeling she is "overweight" and like many boat mfgs I work
> with this is not unusual to have a displacement spec that was a target
> but not achieved.  This particularly happens with the first few boats
> built; they are over built which is a good thing.
> 
> However, I am going to have POIA measured this spring since if the
> displacement is in fact much higher than the specs then her PHRF rating
> is lower than it should be.  I would be curious if other members have
> any such experiences?
> 
> thanks
> Glenn Walters
> 
> 
> 
> _______________________________________________
> Listserve mailing list
> Listserve at catalina38.org
> http://catalina38.org/mailman/listinfo/listserve_catalina38.org
> 
> 
> _______________________________________________
> Listserve mailing list
> Listserve at catalina38.org
> http://catalina38.org/mailman/listinfo/listserve_catalina38.org
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.432 / Virus Database: 270.14.135/2615 - Release Date:
> 01/11/10 19:35:00
> 
> _______________________________________________
> Listserve mailing list
> Listserve at catalina38.org
> http://catalina38.org/mailman/listinfo/listserve_catalina38.org