" so folks will build up the radial drive with reinforcement plates above and below the wheel and through bolt the attachment point through 3 layers of metal to mitigate any torsional loads from the ram."
I think that is exactly what has been done to our Radial Wheel in the photos I linked (i.e. there is another plate below the wheel, out of sight in the photos) Photos here: https://photos.app.goo.gl/GDctE5v2j7jdphxr7 https://photos.app.goo.gl/mbUNnFetP4DzAZUW8 If the Radial Wheel gave up the ghost as Chuck suggests could happen, the emergency tiller would still work. Better than nothing I suppose. Ken H. On Mon, 25 May 2020 at 16:58, Chuck Gilchrest via CnC-List < cnc-list@cnc-list.com> wrote: > The main reasons for having A separate attachment point for the autopilot > is to provide system redundancy and the fact that the radial Drive is not > adequately reinforced to withstand single point steering forces. On the > radial, steering loads are applied to the perimeter of the wheel spread out > around the circumference and the casting has reinforced ribs to support the > radial loads. If the autopilot ram were to overpower the strength of the > radial wheel, the wheel could crack or break rendering both the cable > steering and the linear drive ram inoperative. > In certain boats like a Landfall 38, there’s just no room for a tiller > arm, so folks will build up the radial drive with reinforcement plates > above and below the wheel and through bolt the attachment point through 3 > layers of metal to mitigate any torsional loads from the ram. Having the > ram well aligned will help in this application. > Chuck Gilchrest > S/V Half Magic > 1983 35 Landfall > Padanaram MA > > Sent from my iPhone > > On May 25, 2020, at 3:43 PM, Chris Riedinger via CnC-List < > cnc-list@cnc-list.com> wrote: > > > https://photos.app.goo.gl/g1ViKUJJeLnRauD47 > > Here's ours > > On Mon, May 25, 2020, 12:22 PM Ken Heaton via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Hi Len, >> >> Many people will say you should not attach your autopilot to your >> quadrant, but instead install another independent arm onto the rudder shaft. >> >> Still, ours is attached to our quadrant (Radial Wheel) and we've had no >> problems with it there in 12 years. We aren't sailing around the world >> though. >> >> Photos here: >> >> https://photos.app.goo.gl/GDctE5v2j7jdphxr7 >> https://photos.app.goo.gl/mbUNnFetP4DzAZUW8 >> >> Ken H. >> >> >> On Mon, 25 May 2020 at 15:31, Len Mitchell via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> Does anyone have pictures of their Auto Pilot linear drive installation >>> to the quadrant? So mounted in the port side lazarette. I have below deck >>> pics. TIA >>> Len Mitchell >>> Crazy Legs >>> 1989 37+ >>> Midland On. >>> >>> >>> Sent from my mobile device. >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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