Sent from my iPad > On May 30, 2016, at 2:41 PM, "jerry@jerrymontgomery.org" wrote: > > Henry- I'm 99% positive that my 17's have never strayed from the 6'7" measurement, as designed by Lyle Hess. The flush deck is longer but offhand I don't remember by how much. 7.16 seems a bit light. My drawing room is a wreck right now because of some drawing I'm doing for Sage, but when I run across the flush deck sailplan I'll post it here. > > I know that Eg moved the headstay fitting back several inches; as to why I have no idea. Decreases performance, weakens the rig (I've fixed several of them that were cracking out by taking them back to the original). Unless he moved the mast aft a corresponding amount the J would be decreased. Sounds like something a non -sailor would do. > > -----Original Message----- From: Henry Rodriguez > Sent: Friday, May 27, 2016 5:53 PM > To: For and about Montgomery Sailboats > Subject: Re: M_Boats: Genoa size... > > Jerry, > could you chime in and help clarify the differences in the M17 "J" > measurements ? > > Tim and Gary, > I'm aware of the Sailrite data and have a copy of the handwritten chart of > sail sizes in my files. That's where the 6.58 J measurement comes from. > But on the MSOG web site under "Measurements as supplied by Jerry > Montgomery" the M17 J is shown as 7.16 The tall rig is shown as having > the same 7.16 J. No info on the flush deck version. > I would think getting the J measurement for a flush deck boat would be a > simple matter of measuring from the forestay fitting to the mast. Not so > simple with a conventional boat; the cabin is in the way. You can get an > approximation but not an exact measurement. I suppose you can using trig > and math too advanced for my simple brain. > My 1979 boat has the bow fitting for the forestay all the way forward. I > know that some later models have the fitting mounted quite a bit further > aft. Could that be the reason for the different published measurements? > > Tim, > I would love to see the dimensions of your reacher and 150 if you don't > mind posting them. > > > > > Henry > > > > > > >> On Friday, May 27, 2016, Timothy JarviMD wrote: >> >> Sailrite has some of the original handwritten sail sizes and dimensions: >> >> >> http://fabric-calculator.sailrite.com/ShowAd.aspx?id=5832&SourceID=%200%20&BoatName=MONTGOMERY+17 >> >> Also I had a local friend who's a big boat engineer/sailboat cruiser and >> racer/local rep for Mack Sails come measure my flush deck 17 to get it >> right on the money for my odd duck of a 17. We climbed all around the boat >> for a while with a long tape measure. You probably have the same ability to >> find a maker there. There are a few articles in the depths of MSOG.org >> where Jerry M talks about his "suit" of sail for the M17 and the Sage 17, >> though that's a fractional rigged boat. He was a big fan of a super light >> BIG reacher as well as a 150. Both of which I have if there's any interest >> in dimensions (not too many flush decks though). Have fun! New sails from >> my late 70's M17: wow! >> >> Tim >> >> On Fri, May 27, 2016 at 1:40 AM, GILASAILR--- via montgomery_boats < >> montgomery_boats@mailman.xmission.com > wrote: >> >> > Henry, >> > >> > I have a rigging drawing dated '1973' that shows the 'J' dimension as >> > 6'-7" - you are fine at that number - that is approx. .04" less than > 'J' >> > - as >> > my grandson likes to say (20 mo) "OOhh myy! >> > >> > We can ask Jerry if the 7.16' is for the flush deck?? >> > >> > Have Fun Go sailing. >> > >> > GO >> > >> > >> > In a message dated 5/26/2016 8:33:50 P.M. US Mountain Standard Time, >> > heinzir@gmail.com writes: >> > >> > I have seen two different figures published for the "J" measurement of >> > the >> > M17: >> > 6.58 ft and 7.16 ft. I'm guessing that the longer one is for the >> original >> > (and newest?) boats that have the forestay pinned at the tip of the bow >> > and >> > the shorter is for the newer style boats that have the forestay pinned >> > back >> > from the bow about 6". >> > >> > I think I ordered sails using the shorter "J" measurement and >> shortchanged >> > myself! My 150 is actually 137 and my 135 is closer to 125! >> > >> > >> > Henry >> > >> > >> > >> > >> > >> > >> > >> > On Thursday, May 26, 2016, > >> wrote: >> > >> > > Genoa size is luff perpendicular (LP) expressed a percentage of the J >> > > measurement. LP is the length of a line drawn from the clew to the >> > forestay >> > > intersecting the forestay at a 90 degree angle. The J measurement is >> the >> > > length of a line from the forestay pin back to the mast intersecting >> the >> > > mast at a 90 degree angle. On an M17 it is an imaginary line because >> the >> > > mast doesn't actually extend down that far down. There is some >> > conflicting >> > > info out there but I believe the J measurement on an M17 is >> > approximately 6 >> > > 1/2'. Maybe someone else can chime in with the exact number. Measure >> > your >> > > LP and compare it to that to determine what you have. For example, an >> LP >> > of >> > > 10' corresponds roughly to a 150 genoa. >> > > >> > > If your genoa is an older hank-on, it is probably a 150. If it is on > > a >> > > roller-furler, it might be a little smaller. I run a 135, which is a >> > > popular size for a roller furling genoa. >> > > >> > > ----- Original Message ----- >> > > >> > > From: "Jazzy" > >> > > To: "For and about Montgomery Sailboats" < >> > > montgomery_boats@mailman.xmission.com > >> > > Sent: Thursday, May 26, 2016 2:41:37 PM >> > > Subject: M_Boats: Genoa size... >> > > >> > > Hi all, was just pondering my tired sails. How does one know what > > size >> > > Genoa is installed? Thanks! >> > > >> > > Couple of updates... >> > > >> > > Stoked for Mem Day...trailering to Pleasant Harbor Marina where we >> have >> > a >> > > slot for a night, full amenities and a motor couple coming to join > > the >> > > festivities. Should be good pirate fun. >> > > >> > > Last week I took my friends son out. He's 18 and had never been in a >> > > sailboat, we spent a few hours tooling around the harbor, I worked > > him >> > hard >> > > on terminology, parking, stopping at random buoys, starting and >> stopping >> > > the motor, approaching objects slowly... boy was he surprised when I >> > > hopped off and told him to take a solo lap at the end of the day! >> > Hahaha. >> > > Reminded me of flight instructor days. His dad told me afterward he >> > > couldn't stop talking about it. Now dad wants to go. Maybe got us two >> > new >> > > sailors... do share your boats and teach some youngsters! What's a >> dock >> > > ding or two compared to passing the torch?? Hahaha. A bonus was that > > I >> > got >> > > to see my boat cruising around. They are quite graceful and salty >> > looking >> > > when off their trailer aren't they ? ;) Much sexier than the Harbor > > 20 >> > > that was buzzing around. >> > > >> > > Found a slip for 110 a month 8 minutes from home...sooo tempted. >> > > Comments? Is the bottom going to hell in a hand basket? >> > > >> > > Jazz >> > > >> > > >> > >> > -- >> > Sent from Gmail Mobile on Windows 10 phone >> > >> > > > > -- > Sent from Gmail Mobile on Windows 10 phone > >