John- what do you paddle, out of curiousity? jerry ----- Original Message ----- From: "John Schinnerer" <john@eco-living.net> To: "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Tuesday, June 26, 2012 11:57 AM Subject: Re: M_Boats: How much heel on M17
In the world of paddlecraft (canoe and kayak) we'd call that the difference between 'primary stability' and 'secondary stability' - sounds like the M15 has 'loose' primary stability (wobbles when flat) and distinct secondary stability (sits securely 'on edge' or with a bit of heel). The M17 sounds like it has slightly more primary stability.
Terminology...go figure!
cheers, John S.
On 06/26/2012 11:48 AM, W David Scobie wrote:
Tom:
more roll than yaw. the M15 wants to stay on her course (not yaw) just roll ... wobble ;-) ... from port to starboard if you don't have her heeling.
M17 isn't doesn't do this as much as the M15.
:: Dave Scobie
--- On Tue, 6/26/12, Tom Jenkins <tjenk@gte.net> wrote:
Dave, Your "wobble" is a "yaw", methinks. Been waiting years to use that word.
On Jun 26, 2012, at 11:19 AM, W David Scobie wrote:
the M17 likes to be a bit more flat than the M15. i find SWEET PEA sails better with some heal ... more than a P15 or P19.
the M15 will 'wobble' port to starboard some, from about 10 degrees one side to 10 degrees other side (ie, 20 deg. arc) if you try to keep her flat as her hull shape 'wants' her to heel. much more 'stable' if you have her leaning to one side.
hull shapes, when looking closely, are very different on the M17 and M15, especially the hull shape port and starboard of the keel, and aft of the keel.
:: Dave Scobie :: former M15 owner - www.freewebs.com/m15-named-scred :: M17 #375 SWEET PEA - www.m17-375.webs.com
--- On Tue, 6/26/12, Tom Jenkins <tjenk@gte.net> wrote:
Dave, My first little boat was a Potter 14, which sails
best
flat. I assumed an M17 likes to be flat too, but I never checked. What you think? Tom Jenkins M17 Scintilla
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net http://eco-living.net
-- I am using the free version of SPAMfighter. SPAMfighter has removed 6728 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len Do you have a slow PC? Try Free scan http://www.spamfighter.com/SLOW-PCfighter?cid=sigen