And if I recall from prior threads (check the archives Gerry, quite a bit on mast rake in last year or so, including from Jerry himself), in degrees the recommendation is 1-2 degrees for M17. So you can use trig to determine what that is in inches. I got new forestay and backstay last year and set mine up and I have about 4 inches on mine I think, which IIRC is about 1.5 degrees. So six inches would be 2 degrees. Don't trust my memory - there's online trig calculators that will do the math for you, put in the mast length (the longest side of the triangle) and desired angle (e.g. 2 degrees) and it will tell you the other two side of the triangle, including the very short little side that is the distance from mast base aft to vertical line up to masthead (where the main halyard would hang on a perfectly level boat on a windless day :-). cheers, John On 5/3/19 10:42 AM, Dave Scobie wrote:
Gerry.
Start with six inches of rake and see how it goes. Adjust from there after you get some sail time. Some rake is good. Straight up bad.
:: Dave Scobie :: M6'8" #650 :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - www.freewebs.com/m15-named-scred/
On Fri, May 3, 2019, 10:35 AM Gerry Lempicki via montgomery_boats < montgomery_boats@mailman.xmission.com> wrote:
Now that the bottom paint project is near an end, I am hoping to start fitting my new mast next week. What is the consensus regarding rake on the 17? I see on Jerry's site that the M15 likes a little rake aft. Same on the M17 or no? And if so, how much is a little? Does one actually flex the mast doing this? The reason I ask is that the new mast from Dwyer came with a new hinged step rather than a tabernackle, so there is no pivoting on a tabernackle bolt once it's mounted with this hinged step and pinned in place.
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com