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Autopilot
On Mon, 17 Nov 2003 21:58:49 -0500, Rodney Myrvaagnes
wrote (with possible editing): On Mon, 17 Nov 2003 20:53:41 GMT, L. M. Rappaport wrote: On Mon, 17 Nov 2003 15:37:07 GMT, "Daniel E. Best" wrote (with possible editing): Larry, I'm not at all familiar with your boat, but would there be any way to rig a tiller pilot to work? These are devices designed to by used by sailboats w/ a tiller, but are often also used with some wind vanes (like the monitor). They steer the boat to a compass heading, but most can also be interfaced to accept NEMA and steer to a waypoint. Cost new starts about $300 Dan, Thanks for the tip. I'm not familiar with tiller pilots that accept NEMA data, but now that I know there are some, I'll definitely take a look. Thanks. If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. I don't know how to mount a tiller pilot on a motor boat. I use one on my sailboat with the emergency tiller. I do plan to hook up the NMEA but it works without it. Rodney Myrvaagnes NYC J36 Gjo/a Thanks, guys, Well, I did a little research and I'm not sure a tiller pilot would work. The inexpensive models seem to be designed to connect to a conventional tiller. When you step up a bit, it looks like you replace the wheel with a new assembly. I'm going to have to first figure out what kind of steering linkage is being used he I know it's not cables, but I don't know if it's hydraulic or mechanical. Then I have to figure out how much travel, and whether or not you can move the jet without turning the wheel; i.e., if you turn the jet, does the wheel move or does it even matter.... I'll keep looking and report back here. I tried two suppliers yesterday, but both said I needed to talk to the manufacturer. The manufacturer says I need to talk to the dealer. The dealer doesn't know... Figures... -- Larry Email to rapp at lmr dot com |
Autopilot
Rodney Myrvaagnes wrote:
If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. I will pick nits here, Rodney, but mostly semantic nits. The idea behind the NMEA autopilot interface is to have the vessel _maintain_ a straight (or more accurately rhumb) line course. If the autopilot is set merely to follow a magnetic compass course, then the resultant track will be at the mercy of currents, wind, leeway, etc. .. -- Good luck and good sailing. s/v Kerry Deare of Barnegat http://kerrydeare.tripod.com |
Autopilot
Rodney Myrvaagnes wrote:
If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. I will pick nits here, Rodney, but mostly semantic nits. The idea behind the NMEA autopilot interface is to have the vessel _maintain_ a straight (or more accurately rhumb) line course. If the autopilot is set merely to follow a magnetic compass course, then the resultant track will be at the mercy of currents, wind, leeway, etc. .. -- Good luck and good sailing. s/v Kerry Deare of Barnegat http://kerrydeare.tripod.com |
Autopilot
Larry, you described this as a jet ski. Does it have a wheel or handle
bars? I was envisioning more of a handle bar like arrangement and rigging some way to connect the ram to one of the handle bars. Some of the wheel pilots (like the one I have) afix a small rim to the inside of a wheel that a belt goes around to actually turn the wheel. Good luck - Dan L. M. Rappaport wrote: On Mon, 17 Nov 2003 21:58:49 -0500, Rodney Myrvaagnes wrote (with possible editing): On Mon, 17 Nov 2003 20:53:41 GMT, L. M. Rappaport wrote: On Mon, 17 Nov 2003 15:37:07 GMT, "Daniel E. Best" wrote (with possible editing): Larry, I'm not at all familiar with your boat, but would there be any way to rig a tiller pilot to work? These are devices designed to by used by sailboats w/ a tiller, but are often also used with some wind vanes (like the monitor). They steer the boat to a compass heading, but most can also be interfaced to accept NEMA and steer to a waypoint. Cost new starts about $300 Dan, Thanks for the tip. I'm not familiar with tiller pilots that accept NEMA data, but now that I know there are some, I'll definitely take a look. Thanks. If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. I don't know how to mount a tiller pilot on a motor boat. I use one on my sailboat with the emergency tiller. I do plan to hook up the NMEA but it works without it. Rodney Myrvaagnes NYC J36 Gjo/a Thanks, guys, Well, I did a little research and I'm not sure a tiller pilot would work. The inexpensive models seem to be designed to connect to a conventional tiller. When you step up a bit, it looks like you replace the wheel with a new assembly. I'm going to have to first figure out what kind of steering linkage is being used he I know it's not cables, but I don't know if it's hydraulic or mechanical. Then I have to figure out how much travel, and whether or not you can move the jet without turning the wheel; i.e., if you turn the jet, does the wheel move or does it even matter.... I'll keep looking and report back here. I tried two suppliers yesterday, but both said I needed to talk to the manufacturer. The manufacturer says I need to talk to the dealer. The dealer doesn't know... Figures... -- Larry Email to rapp at lmr dot com -- Dan Best - (707) 431-1662, Healdsburg, CA 95448 B-2/75 1977-1979 Tayana 37 #192, "Tricia Jean" http://rangerbest.home.comcast.net/TriciaJean.JPG |
Autopilot
Larry, you described this as a jet ski. Does it have a wheel or handle
bars? I was envisioning more of a handle bar like arrangement and rigging some way to connect the ram to one of the handle bars. Some of the wheel pilots (like the one I have) afix a small rim to the inside of a wheel that a belt goes around to actually turn the wheel. Good luck - Dan L. M. Rappaport wrote: On Mon, 17 Nov 2003 21:58:49 -0500, Rodney Myrvaagnes wrote (with possible editing): On Mon, 17 Nov 2003 20:53:41 GMT, L. M. Rappaport wrote: On Mon, 17 Nov 2003 15:37:07 GMT, "Daniel E. Best" wrote (with possible editing): Larry, I'm not at all familiar with your boat, but would there be any way to rig a tiller pilot to work? These are devices designed to by used by sailboats w/ a tiller, but are often also used with some wind vanes (like the monitor). They steer the boat to a compass heading, but most can also be interfaced to accept NEMA and steer to a waypoint. Cost new starts about $300 Dan, Thanks for the tip. I'm not familiar with tiller pilots that accept NEMA data, but now that I know there are some, I'll definitely take a look. Thanks. If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. I don't know how to mount a tiller pilot on a motor boat. I use one on my sailboat with the emergency tiller. I do plan to hook up the NMEA but it works without it. Rodney Myrvaagnes NYC J36 Gjo/a Thanks, guys, Well, I did a little research and I'm not sure a tiller pilot would work. The inexpensive models seem to be designed to connect to a conventional tiller. When you step up a bit, it looks like you replace the wheel with a new assembly. I'm going to have to first figure out what kind of steering linkage is being used he I know it's not cables, but I don't know if it's hydraulic or mechanical. Then I have to figure out how much travel, and whether or not you can move the jet without turning the wheel; i.e., if you turn the jet, does the wheel move or does it even matter.... I'll keep looking and report back here. I tried two suppliers yesterday, but both said I needed to talk to the manufacturer. The manufacturer says I need to talk to the dealer. The dealer doesn't know... Figures... -- Larry Email to rapp at lmr dot com -- Dan Best - (707) 431-1662, Healdsburg, CA 95448 B-2/75 1977-1979 Tayana 37 #192, "Tricia Jean" http://rangerbest.home.comcast.net/TriciaJean.JPG |
Autopilot
On Tue, 18 Nov 2003 11:08:14 -0500, "Armond Perretta"
wrote: Rodney Myrvaagnes wrote: If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. I will pick nits here, Rodney, but mostly semantic nits. The idea behind the NMEA autopilot interface is to have the vessel _maintain_ a straight (or more accurately rhumb) line course. If the autopilot is set merely to follow a magnetic compass course, then the resultant track will be at the mercy of currents, wind, leeway, etc. . You are right, of course, and that is why I intend to hook up the NMEA next spring. But my old autopilot, which had no such facility, could hold a fairly straight course in motoring conditions for a few hours. Until it gave up completely. Rodney Myrvaagnes J36 Gjo/a The meme for blind faith secures its own perpetuation by the simple unconscious expedient of discouraging rational inquiry. - Richard Dawkins, "Viruses of the Mind" |
Autopilot
On Tue, 18 Nov 2003 11:08:14 -0500, "Armond Perretta"
wrote: Rodney Myrvaagnes wrote: If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. I will pick nits here, Rodney, but mostly semantic nits. The idea behind the NMEA autopilot interface is to have the vessel _maintain_ a straight (or more accurately rhumb) line course. If the autopilot is set merely to follow a magnetic compass course, then the resultant track will be at the mercy of currents, wind, leeway, etc. . You are right, of course, and that is why I intend to hook up the NMEA next spring. But my old autopilot, which had no such facility, could hold a fairly straight course in motoring conditions for a few hours. Until it gave up completely. Rodney Myrvaagnes J36 Gjo/a The meme for blind faith secures its own perpetuation by the simple unconscious expedient of discouraging rational inquiry. - Richard Dawkins, "Viruses of the Mind" |
Autopilot
On Tue, 18 Nov 2003 17:58:39 GMT, Dan Best wrote
(with possible editing): Larry, you described this as a jet ski. Does it have a wheel or handle bars? I was envisioning more of a handle bar like arrangement and rigging some way to connect the ram to one of the handle bars. Some of the wheel pilots (like the one I have) afix a small rim to the inside of a wheel that a belt goes around to actually turn the wheel. Good luck - Dan ....snip Dan, Well, actually I said: "It is a jet boat powered by a 200 hp Merc". At 18.5' it would be quite a personal watercraft! Yes, it has a wheel. It seats 8 (6 comfortably) and looks like a runabout for all intents and purposes. The only significant difference is that it is powered by a jet with no lower unit or anything below the keel to smash into rocks. The wheel seems to be an enclosed unit with a cable or tube coming out of it. Thanks, -- Larry Email to rapp at lmr dot com |
Autopilot
On Tue, 18 Nov 2003 17:58:39 GMT, Dan Best wrote
(with possible editing): Larry, you described this as a jet ski. Does it have a wheel or handle bars? I was envisioning more of a handle bar like arrangement and rigging some way to connect the ram to one of the handle bars. Some of the wheel pilots (like the one I have) afix a small rim to the inside of a wheel that a belt goes around to actually turn the wheel. Good luck - Dan ....snip Dan, Well, actually I said: "It is a jet boat powered by a 200 hp Merc". At 18.5' it would be quite a personal watercraft! Yes, it has a wheel. It seats 8 (6 comfortably) and looks like a runabout for all intents and purposes. The only significant difference is that it is powered by a jet with no lower unit or anything below the keel to smash into rocks. The wheel seems to be an enclosed unit with a cable or tube coming out of it. Thanks, -- Larry Email to rapp at lmr dot com |
Autopilot
Rodney Myrvaagnes wrote:
"Armond Perretta" wrote: Rodney Myrvaagnes wrote: If all you need is to hold a straight line, you don't even need to hook up the NMEA. The autopilot will follow the magnetic course you start it on with its internal fluxgate compass. ... If the autopilot is set merely to follow a magnetic compass course, then the resultant track will be at the mercy of currents, wind, leeway, etc. You are right, of course, and that is why I intend to hook up the NMEA next spring. But my old autopilot, which had no such facility, could hold a fairly straight course in motoring conditions for a few hours. Until it gave up completely. I have written about autopilots here before, but just to bring you up to day, I now carry 3 tiller pilots. I had an instance 2 or 3 years ago where both of the 2 then on board went out. A short while after that I cracked a part of the windvane self-steerer. So now it's 3 tiller pilots and the repaired Navik. Hmmmmm. -- Good luck and good sailing. s/v Kerry Deare of Barnegat http://kerrydeare.tripod.com |
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