David, You are spot on with that assessment. Aluminum Radial drive wheels in particular are cast so that the steering loads are carried tangentially along the outer edge of the wheel (in the groove). Drilling a hole in the casting 90 degrees from the designed load plane and through bolting an attachment point for a linear drive wheel will likely result in the cast wheel fracturing under serious loads. If the radial was to break, you would lose both your autopilot AND the cable steering. I have seen several autopilot installations (not on LF 38 mind you) in confined spaces using an Octopus drive and 8" tiller arms. Perhaps that could be an option. Maybe Fred may have experience with those regarding compatibility with different control heads... Chuck Gilchrest S/V Half Magic 1983 LF 35 Padanaram MA
Sent from my iPhone > On May 31, 2016, at 9:59 AM, David via CnC-List <cnc-list@cnc-list.com> wrote: > > It is my understanding that attaching a ram directly to a quadrant is not > recommended by Edson etc. Quadrants are not engineered for those point > loads. > > Chuck? > > David F. Risch > 1981 40-2 > (401) 419-4650 (cell) > > > Date: Sun, 29 May 2016 20:36:36 -0500 > To: cnc-list@cnc-list.com > Subject: Re: Stus-List Installing linear autohelm on LF38 > From: cnc-list@cnc-list.com > CC: f...@postaudio.net > > Jason — there is absolutely no room for a tiller arm on the LF38; you need to > attach the ram directly to the quadrant, at the proper distance from the > center of the rudder post for the drive you got. One option is to orient the > ram forward to aft, on the port side of the rudder post (access via the port > quarter berth access hatch). Otherwise, about your only other option is to > have the ram oriented athwartship, forward of the rudder post, with the > access through the cockpit locker. > > There are no easy steering system jobs on the LF38. > > — Fred > > Fred Street -- Minneapolis > S/V Oceanis (1979 C&C Landfall 38) -- Bayfield, WI > > On May 29, 2016, at 8:32 PM, Jason & Amanda Ward via CnC-List > <cnc-list@cnc-list.com> wrote: > > Good Day Everyone. Now that the sailing season is upon us life is good > again. Life would be even better if I was able to use my autohelm. I have > purchased an Raymarine EV200 linear drive unit and am trying to figure out > how to install it below deck. As all C&C owners know there is very little > room at the best of times and it appears that when they made the LF38, > autohelm was never even a consideration. > > I was wondering if there are any other LF owners out there that have > successfully installed a linear below deck drive that would be willing to > pass on their installation process. Photos would also be appreciated. > > Life is good on a boat, even when you are fixing her. > > Good sailing and hope to talk soon. > > Jason > Starship LF38 > Lake Winnipeg, Manitoba > > > _______________________________________________ This list is supported by the > generous donations of our members. If you like what we do, please help us pay > for our costs by donating. All Contributions are greatly appreciated! > > Virus-free. www.avast.com > _______________________________________________ > > This list is supported by the generous donations of our members. If you like > what we do, please help us pay for our costs by donating. All Contributions > are greatly appreciated!
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