On a breezy day with a single reef in the main I can roll the jib 3 or 4 turns and still sail happily to windward. Never checked to see how many degrees I've actually lost in pointing, but don't get the feeling that it's much. Rick M17 #633 Lynne L On Thursday, October 27, 2016, Keith R. Martin < keith.richard.martin@gmail.com> wrote:
Hey Rick,
My new 109 that I got with my furler also has the padded luff and indeed the pointing performance with first few rolls remains reasonable but it does seem to roll off a little bit... I would be really interested in your estimate of how much you can reef in your 135 and still keep it pointing reasonably...
Keith
*Keith R. Martin, P.Eng.*
*Burnaby, B.C. CanadaSerenity,** M17 Hull #353*
On 27 October 2016 at 15:41, Rick Davies <jdavies104@gmail.com <javascript:;>> wrote:
Kieth,
I have an Elliot-Patterson 135% Genoa on my CDI furler with a padded luff that lets you take several rolls on the furler without hurting shape or pointing ability much. Also gives you that extra sail in light air.
Rick M17 #633 Lynne L
On Thursday, October 27, 2016, Keith R. Martin < keith.richard.martin@gmail.com <javascript:;>> wrote:
Hey John,
I had an old 120/130 ish (more than a 109 and less than a 150) hank on head sail that came originally with the boat...
For me I think there is a substantial safety benefit in a furler for single handing, which for me is most of the time ..
I now have a 109% on a CDI furler.. I have found it's been a good compromise for single handing the boat up and down the Georgia straight. Certainly there have been some lighter wind days in the summer that I have yearned for a bit more head sail, but there have also been plenty of days when I have had a reef or two in the main and been very thankful for the 109 on the furler...
As we all know there is a trade off on pointing ability with a furler and particularly once the jib is partially furled hence my choice of a 109 that allows me to defer "reefing the jib". That said the boat performs and points pretty well with no reef or a single reef in the main and the 109 on the CDI fully deployed (with some attention paid to proper forestay tension) and has just okay performance when the 109 is furled just a bit, after that deeper furling is not all that stellar ( that's Canadian for it sucks).
I toyed with putting a 120 on my furler when I first bought it but frankly I had not spent enough time in the boat in the straight to be sure it was the right choice for me... In retrospect while a larger jib on the furler is probably okay for summer, the fall and spring shoulder seasons up here generally have no shortage of wind, so I think the 109 is a good all season choice for my sailing in "my hood" ...
Just my perspective on the choices I made for my boat and the local conditions I single hand sail in.
Keith
Keith R. Martin, P.Eng Serenity, M17 Hull #353
On Oct 26, 2016 7:21 PM, "John Schinnerer" <john@eco-living.net <javascript:;> <javascript:;>> wrote:
Thanks, that means my 80%-ish Reggie Armstrong jib is probably the original "high wind" jib. I didn't get a 109% with the boat, just the 80% and the 150% genoa. I mostly single-hand, or have passengers that are not really "crew" (they ain't gonna change a headsail under way), so something like the 109 working jib would be nice to have.
Or, a furling jib...
cheers, John S.
On 10/26/2016 05:41 PM, Judith Blumhorst, DC wrote:
Hi All, Just for those of you who are curious about sail sizes: That calculator is pretty cool, but it understates the real LP% by a small amount. The sail has a curved surface, but the calculator is computing the shortest straight-line distance between two points on the curved surface. This kind of measurement is referred to as "geodesic" The true LP, when measured on the sail itself, will always be slightly bigger than a geodesic-space calculation indicates. Sail design software computes dimensions along the curved surface of the sail. BTW, according to the original sailplan that Jerry so generously sent me, there was an 80%-ish LP Heavy wind jib. Also a 109%, which is a great, versatile working jib for the M17. Regards,Judywww.HydeSailsDirect.com
On Sat, Oct 22, 2016 at 2:04 PM, John Schinnerer < john@eco-living.net <javascript:;> <javascript:;>> wrote:
Tidying up my sails, finally doing some measuring...
My "small" jib is not the 109% standard or working M17 jib, it's
quite a
bit smaller. Here's one calculator I found: http://sailingfortuitous.com/apps/jibcalc.html
This and other similar formulas found online put it at about 81-82% (luff 189", leach 160", foot 76"). In between a working jib and a true (like 60-65%) storm jib.
Also played with the outhaul method shown in that video I posted recently. Really a good idea AFAICT. Works as clew strap and outhaul both; automagically balances the angle of pull on the clew.
And, makes it much easier to move that same outhaul line to a different reef grommet - no need to tie or untie any knots on flapping sail in bouncing boat. Just loose the outhaul, pull out of current grommet & block, route back through new grommet & block & make fast. With a boltrope or slug footed sail of course. This would be a Very Bad Idea on a loose-footed main...!
cheers, John S.
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net <javascript:;> <javascript:;> - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net <javascript:;> <javascript:;> - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com