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  Topic Review (Newest First)
2 Days Ago 11:52 PM
Classic30
Re: Production Boats and the Limits

Hmmm... fair point, but I'm not sure that's really a big issue on an auxiliary sailboat where larger bearings can be spec'd no problem.

Quote:
Originally Posted by bobperry View Post
Classic:
I'd like that degree of flexibility. In the 70's we tried it with hydraulic drive. It was kinda sorta successful. But the hydraulics brought some problems with it. I had one of those boats myself. I could tell you a very funny story about that some day.
I do remember the old hydraulic drives - 'orrible bloody things they were. A Peterson I used to crew on still has one.. and uses the same hydraulic circuit for the anchor winch and backstay/babystay tensioners.

Cleaning hydraulic oil out of the bilges was not a fun pastime.. and fixing the leaks from the hydraulic motor was even worse.
2 Days Ago 09:29 PM
hellsop
Re: Production Boats and the Limits

Quote:
Originally Posted by Classic30 View Post
Actually, Bob, by using a modern hybrid drive (electric motor, controller and generator) designers like yourself have an enormous amount of flexibility with these variables. Being able to stick the maintenance-free shoe-box sized motor down in the bilge with a straight run to the prop and the engine/generator where you can actually get at it (not just in line with the prop) makes life a heck of a lot easier than it used to be..
Reliable thrust bearings are the tricky parts with those. Remember all the issues cruise ships have had with azipods? Most of them are thrust bearing failing FAR earlier than expected. Obviously, a sailboat's going to put a lot less time and strain on them in general, but most motors are designed for the rotational twist and lateral force, not force up the axis.
3 Days Ago 08:14 PM
hellsop
Re: Production Boats and the Limits

Quote:
Originally Posted by JonEisberg View Post
Turns out the engine is made by a Japanese outfit named Shibauhara (sp?), and is one of the most popular light industrial/tractor engines in the world, the same one used by companies like Massey-Ferguson and New Holland in many of their products...
Shibaura, a cooperative venture between Toshiba and Ishikawajima-Harima Heavy Industries, a ship-building firm. They build a LOT of rebadged engines.
3 Days Ago 08:02 PM
seaner97
Quote:
Originally Posted by seaner97 View Post
Quote:
Originally Posted by bobperry View Post
Seaner:
I don't recall that outburst. I can imagine myself saying it. It could have been the Tayana Bingham FANTASIA double ender. I would feel comfortable saying that about that boat. I just think it's an awful design,,,,by my criteria. Which I trust.

If someone out there owns one I'm really sorry I said that. But I feel obliged to be honest in the world of never ending BS.
Oh damn, you're going to make me find it?! It was in reference to some young buck considering a Ty37 with thin teak decks with many plugs missing. Maybe Mike O can help out, as I think he chimed in. Considering you designed it, I thought it might be enlightening to see what you thought the issues are and what you learned from it that would have you say that.
Here you go:
http://tracker.sailnet.com/forums/bo...postid=2936138
3 Days Ago 06:41 PM
seaner97
Quote:
Originally Posted by bobperry View Post
Seaner:
I don't recall that outburst. I can imagine myself saying it. It could have been the Tayana Bingham FANTASIA double ender. I would feel comfortable saying that about that boat. I just think it's an awful design,,,,by my criteria. Which I trust.

If someone out there owns one I'm really sorry I said that. But I feel obliged to be honest in the world of never ending BS.
Oh damn, you're going to make me find it?! It was in reference to some young buck considering a Ty37 with thin teak decks with many plugs missing. Maybe Mike O can help out, as I think he chimed in. Considering you designed it, I thought it might be enlightening to see what you thought the issues are and what you learned from it that would have you say that.
3 Days Ago 06:01 PM
Brent Swain
Re: Production Boats and the Limits

Quote:
Originally Posted by Classic30 View Post
Actually, Bob, by using a modern hybrid drive (electric motor, controller and generator) designers like yourself have an enormous amount of flexibility with these variables. Being able to stick the maintenance-free shoe-box sized motor down in the bilge with a straight run to the prop and the engine/generator where you can actually get at it (not just in line with the prop) makes life a heck of a lot easier than it used to be..
On my boats , if I could put the motor anywhere I wanted, the best place for it would still be where it is , under the front end of the cockpit.
3 Days Ago 05:14 PM
bobperry
Re: Production Boats and the Limits

Seaner:
I don't recall that outburst. I can imagine myself saying it. It could have been the Tayana Bingham FANTASIA double ender. I would feel comfortable saying that about that boat. I just think it's an awful design,,,,by my criteria. Which I trust.

If someone out there owns one I'm really sorry I said that. But I feel obliged to be honest in the world of never ending BS.
3 Days Ago 04:54 PM
seaner97
Re: Production Boats and the Limits

Bob- somewhere in here you said you'd throw yourself across the dock to keep someone from buying a Ty37 (and some other boat I can't remember). Care to tell us why?
3 Days Ago 04:35 PM
bobperry
Re: Production Boats and the Limits

You have two stubby little rudders not vertical with no chance of prop wash even if you do want it. It's not going to work very well at all.
3 Days Ago 04:08 PM
Jeff_H
Re: Production Boats and the Limits

Quote:
Originally Posted by PCP View Post
Regarding bowthrusters I fully agree and I will add that the more efficient type of rudders used on modern beamy boats with large transoms (twin rudders) are a lot less effective on docking maneuvers than the classic single deep rudder and in this case it will be irrelevant to be a classic transmission or a sail drive one.
Very good point that had not occurred to me.

Jeff
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