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#71
posted to rec.boats,rec.boats.cruising
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Happiness is...
HK wrote:
We've got some guests coming north from Florida this week for the holiday. Two hours in the plane and they're here. Like magic! Wow! -dk |
#72
posted to rec.boats,rec.boats.cruising
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Happiness is...
On Wed, 21 Nov 2007 00:46:44 GMT, Jere Lull wrote:
I've always wondered... Why not put a feathering prop on at least one of the shafts? Yeah, I know they're expen$ive (we have a MaxProp), but it seems like it might be overall cheaper in the long run. Then again, I'm not sure I've seen a 30" feathering prop. Nevermind.... MaxProp show up to 44" and some indication of a 4 blade; Autoprop shows up to 36". Dang, I'd hate to pay their cost, but I don't much like buying fuel or transmissions either. It's a good thought and one that I might consider if I have to reprop again sometime in the future. Do you have any idea how they work? Is the pitch adjustable in some way or do they just self-feather from the force of the water like a folding prop? The other important issue is reliability. If you are docking a 60,000 lb boat in close quarters you *really* want to know that forward and reverse are working exactly as planned. There is no fending off by hand if something goes wrong. The reality of today's boat insurance market is that if you have an expensive liability claim from damage to another boat, you are probably going to get cancelled and have trouble finding another policy. You pretty much have to self insure for all but the very largest losses these days. |
#73
posted to rec.boats,rec.boats.cruising
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Happiness is...
"Wayne.B" wrote in message ... On Tue, 20 Nov 2007 04:02:00 GMT, "Glenn \(s/v Seawing\)" wrote: Fogive my ignorance. Your GB...works okay to shut down an engine and run on a single engine, rather than throttle back both? Does the drag of the stationary prop still make it worth it? Good question. If you throttle back both engines to run at or below 7 knots, they end up running barely above idle speed which is bad for them over an extended time. By running a single engine you can keep it at an RPM range where it is developing a half way decent amount of power. I still rev it up once in a while for 10 minutes or so. The other issue with single engine is wear and tear on the freewheeling transmission. The trannys depend on the engine running for cooling and lubrication. The manufacturer says that it is OK to let them freewheel at slow speeds but recommends starting the engine every two hours for a few minutes. Economy improves mostly as a result of slower speed. Once you get above 1 x SQRT(LWL) increased speed results in exponentially higher hull drag as more energy goes into the wake. This has got Dad and I talking about possibilities. He cruises on a GB42 & I on my Gulfstar 41 Sloop. We've been trying to slow his boat down enough so I can keep up on a regular basis. I was thinking of buying a small fleet of large dingies to tow behind him to slow him down, but that's an expensive option. Sounds like your idea may be well worth experimenting with. The primary concern for me, would be damage to the transmission....those puppies are expensive. Maybe this'll help Dad cut down on his fuel bill. I constantly tease him 'bout it...he normally burns 4.5gph while I about 2/3gph....when I'm motoring. I sure like his GB though...maybe when I get tired of sailing (whenever that could be). :-) Glenn. s/v Seawing. |
#74
posted to rec.boats,rec.boats.cruising
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Happiness is...
"Dan" wrote in message ... HK wrote: We've got some guests coming north from Florida this week for the holiday. Two hours in the plane and they're here. Like magic! Wow! -dk And 3 hours in airports! |
#75
posted to rec.boats,rec.boats.cruising
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Happiness is...
HK wrote: We've got some guests coming north from Florida this week for the holiday. Two hours in the plane and they're here. Like magic! Wow! And I've got some swamp land in Arizona we need to talk about. Lew |
#76
posted to rec.boats,rec.boats.cruising
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Happiness is...
On 2007-11-20 22:35:18 -0500, Wayne.B said:
On Wed, 21 Nov 2007 00:46:44 GMT, Jere Lull wrote: I've always wondered... Why not put a feathering prop on at least one of the shafts? It's a good thought and one that I might consider if I have to reprop again sometime in the future. Do you have any idea how they work? Is the pitch adjustable in some way or do they just self-feather from the force of the water like a folding prop? They self-feather from the force of the water. The blades reverse to a different pitch in reverse, thus vastly improving the "brakes". The blades are geared, so it's nothing like a folding prop. If you punch reverse, you'll have it in spades. We have the "cheaper" AutoProp that requires taking the hub apart to re-pitch, but they have one that can be re-pitched in the water by adjusting the hub. The Autoprop is self-pitching to the load, so will have a more linear power/rpm curve, and a bit more load at lower RPMs. The other important issue is reliability. If you are docking a 60,000 lb boat in close quarters you *really* want to know that forward and reverse are working exactly as planned. There is no fending off by hand if something goes wrong. The reality of today's boat insurance market is that if you have an expensive liability claim from damage to another boat, you are probably going to get cancelled and have trouble finding another policy. You pretty much have to self insure for all but the very largest losses these days. I believe you'll find that you'll need a less throttle to maneuver and a closer correlation between forward and reverse settings. I suppose it's possible to break one, but they're built pretty heftily and seem to survive charterers' errors. In fact, I don't believe I've heard of one breaking, though I suppose they get dinged as often as fixed wheels. I'd check with the manufacturers, of course, for suitability, but if they're building them 3'+ in diameter, they're putting them in some pretty big boats. -- Jere Lull Tanzer 28 #4 out of Tolchester, MD Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/ Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/ |
#77
posted to rec.boats
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Happiness is...
CalifBill wrote:
"Dan" wrote in message ... HK wrote: We've got some guests coming north from Florida this week for the holiday. Two hours in the plane and they're here. Like magic! Wow! -dk And 3 hours in airports! They lucked out, actually. Relative dropped them off at the airport in Florida, their plane was on time, and it was only five minutes late getting to the gate at National Airport. Even their luggage arrived on the same plane! We were out National Airport in 20 minutes. I think today is going to be the "Day from Hell" in air travel. While I was waiting, I got to see "security" at work. Someone left a small travel bag on a chair near the Delta terminal. Cop on a bike came by for a look see and moved everyone away. About five minutes later, a DC cop arrived with a bomb-sniffing doggie. The dog sniffed the bag and said it was "A-OK," so I guess she got a biscuit. |
#78
posted to rec.boats,rec.boats.cruising
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Happiness is...
Wayne.B wrote:
On Tue, 20 Nov 2007 12:22:40 -0500, Martin Baxter wrote: Forgive my ignorance, I'm just not familiar with something this big. I would think that you could just leave the tranny in gear and stop the motor, or is there sufficient torque generated to turn the motor over? The tranny is hydraulically actuated internally with its own pump driven by the engine. With the engine off there is no pressure to keep the clutches engaged. Ah I see now, makes for a bit of a sticky wicket. Cheers Marty |
#79
posted to rec.boats
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Happiness is...
"HK" wrote in message . .. CalifBill wrote: "Dan" wrote in message ... HK wrote: We've got some guests coming north from Florida this week for the holiday. Two hours in the plane and they're here. Like magic! Wow! -dk And 3 hours in airports! They lucked out, actually. Relative dropped them off at the airport in Florida, their plane was on time, and it was only five minutes late getting to the gate at National Airport. Even their luggage arrived on the same plane! We were out National Airport in 20 minutes. I think today is going to be the "Day from Hell" in air travel. While I was waiting, I got to see "security" at work. Someone left a small travel bag on a chair near the Delta terminal. Cop on a bike came by for a look see and moved everyone away. About five minutes later, a DC cop arrived with a bomb-sniffing doggie. The dog sniffed the bag and said it was "A-OK," so I guess she got a biscuit. You still have to be there way early in case you do not luck out! |
#80
posted to rec.boats,rec.boats.cruising
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Happiness is...
On Wed, 21 Nov 2007 05:21:29 GMT, "Glenn \(s/v Seawing\)"
wrote: This has got Dad and I talking about possibilities. He cruises on a GB42 & I on my Gulfstar 41 Sloop. We've been trying to slow his boat down enough so I can keep up on a regular basis. I was thinking of buying a small fleet of large dingies to tow behind him to slow him down, but that's an expensive option. Sounds like your idea may be well worth experimenting with. The primary concern for me, would be damage to the transmission....those puppies are expensive. Tell me about it. Four man days to get one out, two to rebuild it, three to put it back in, and about two Boat Units worth of parts. Maybe this'll help Dad cut down on his fuel bill. I constantly tease him 'bout it...he normally burns 4.5gph while I about 2/3gph....when I'm motoring. I sure like his GB though...maybe when I get tired of sailing (whenever that could be). :-) What if he towed your Gulfstar? That would slow him down! :-) |
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