New subject: M-15 PHRF Number Conversion

22 Sep 2003

      Hi all:
I've searched the archives and haven't found a PHRF number for the M-15. I
did find some formulas though.
The archives list the PHRF number for the M-17 as 295. Since the M-15 hull
has about the same lines (scaled down), I thought I could work out a ratio.
The rating velocity is given as 3600 / (PHRF + 500) which works out at 4.26
knots for the M-17. The theoretical M-17 hull speed is 1.34 x Sq rt of the
LWL (15.8') or 5.33 knots. Thus the PHRF rating speed is 4.26/5.33 or 80% of
the hull speed.
Applying this to the M-15, I get a hull speed of 4.87S knot based on a LWL
of 13.25'. 80% of this gives a PHRF rating speed of 3.90 knots. Backing into
the formula above, this gives a PHRF number for the M-15 of 373.
Any comments?
Don Ludlow
M-15 # 620 Sweet Dream
Ludlowd@bek.com

-----Original Message-----
From: montgomery_boats-request@mailman.xmission.com
[mailto:montgomery_boats-request@mailman.xmission.com]
Sent: Saturday, September 20, 2003 11:55 AM
To: montgomery_boats@mailman.xmission.com
Subject: montgomery_boats Digest, Vol 7, Issue 27

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Today's Topics:

   1. vague memory . . . (Honshells)
   2. M23 (Honshells)
   3. RE: vague memory . . . (htmills@bright.net)
   4. vague memory . . . (Honshells)
   5. Re: M_Boats:Plastic lumber for bunks (Steve & Diana Parsons)
   6. Re: M_Boats:Plastic lumber for bunks (Richard Lane)
   7. Isabel and the Montgomeryites (htmills@bright.net)
   8. RE: Isabel and the Montgomeryites (htmills@bright.net)
   9. Re: Isabel and the Montgomeryites (TOMMYVAL@aol.com)
  10. Solomon's Photos (htmills@bright.net)
  11. Re: RE: Balsa-core deck (Jerry Montgomery)

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Message: 1
Date: Thu, 18 Sep 2003 22:30:47 -0400
From: "Honshells" <chonshell@ia4u.net>
Subject: M_Boats: vague memory . . .
To: "For and about Montgomery Sailboats"
	<montgomery_boats@mailman.xmission.com>
Message-ID: <006001c37e56$09912420$0e42b3cf@ajrogers>

I have vague memories of two "links" emails I archived for later, one for an
M23 and one for an M15 for sale .
. . Two separate postings . . . I can't find them . . . Does anyone have
them?

------------------------------

Message: 2
Date: Thu, 18 Sep 2003 22:32:40 -0400
From: "Honshells" <chonshell@ia4u.net>
Subject: M_Boats: M23
To: "For and about Montgomery Sailboats"
	<montgomery_boats@mailman.xmission.com>
Message-ID: <007001c37e56$4cf94e40$0e42b3cf@ajrogers>
Content-Type: text/plain; charset="iso-8859-1"

Fred, I'm assuming you're talking about the new M23 Offshore Cutter.  I
think I speak for everyone when I say, "I'd very much like to see more of
and hear more about your boat!!!"  I'm also assuming that you've purchased
the first Offshore Cutter built.  Please post pics when you have them, and
let us know how your 23' performs.  Thanks!  --Craig, chonshell@ia4u.net

    ----- Original Message ----- 
    From: Derfsails@aol.com 
    To: montgomery_boats@mailman.xmission.com 
    Sent: Saturday, September 06, 2003 3:35 PM
    Subject: montgomery_boats Digest, Vol 7, Issue 3

    Hi Mark,

    You may want to talk with Bob Eeg, as the 23 I have purchased from him
does have a bronze center board. We are scheduled to put the mast up and
check the center board this coming Monday then put it in the water on
Tuesday.

    Fred Shelley
    derfsails@aol.com

M_Boats: RE: M-15 PHRF Number montgomery_boats Digest, Vol 7, Issue 27

Ludlow, Don

Ken Abrahams

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