Yeah, Dave, by all means publish the details of that rudder. I have modified an old IDA rudder with fore and aft lines to raise and lower the blade but I would like to be rid of those! If possible. Also, the IDA wieghs about 50 pounds! Was wondering if I could cut holes in the upper section which is high density plastic to lighten the whole thing without inducing twist along the vertical rudder axis while steering the boat with the tiller. Have any thoughts on that? Tom B On Thu, Apr 2, 2015 at 10:05 AM, Dave Scobie <scoobscobie@gmail.com> wrote:
Howard:
i'll put together the details and share with the group ... best this stuff is 'out there' for everyone to better understand the Jerry Montgomery designs.
the simple description is the pushrod inside the rudder cheeks, connects the tiller to the rudder, does all the work. the bungee cord only holds the tiller in the horizontal position and 'locking' the rudder up or down. take off the bungee cord the kickup function still works ... though the rudder will not stay in the up position. to set up the system one needs to 'play a bit' with the exact location where the pushrod attaches to rudder&tiller and the pushrod's length.
give me a couple of weeks to put together details. i'm leaving for the Strictly Sail Pacific boat show on Saturday, be at Jack London Square, Oakland, CA, from the evening of the 6th through the morning of the 13th (the show is 9-12 April '15).
are you in San Fran Howard? (trying to remember and can't place where you are located.) if in San Fran. come to the show, I can get you a ticket, and I can show you the rudder setup in person.
-- :: Dave Scobie :: former M15 owner - www.freewebs.com/m15-named-scred :: M17 #375 SWEET PEA - www.m17-375.webs.com
On Thu, Apr 2, 2015 at 8:30 AM, Howard Audsley <haudsley@tranquility.net> wrote:
No rudder to look at.
You can send it to me off the list if you prefer.
On Apr 2, 2015, at 8:59 AM, Dave Scobie wrote:
So you don't have an M15 rudder to look at? Asking as I need to know how much detail to provide you.
:: Dave Scobie :: M17 #375 SWEET PEA :: Former M15 owner Building a kick up rudder from scratch, but for a different boat.
The design has a hold down line in the front......and a lifting eye and line in the back, but that means two lines running through and attached to the rudder head. Yes it would work, but is butt ugly and a jumble of lines to foul things.
On Apr 2, 2015, at 8:34 AM, Dave Scobie wrote:
Do you have a rudder, our are you wanting to build one from scratch?
:: Dave Scobie :: M17 #375 SWEET PEA :: Former M15 owner On Apr 2, 2015 6:49 AM, "Howard Audsley" <haudsley@tranquility.net> wrote:
Does anyone have a diagram that shows the mechanics of the lifting mechanism used on the M15 rudder?
It has been about 10 years since I've seen one in operation, but
recall
thinking it to be an engineering marvel.