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Old 12-04-2014, 07:55 AM   #1
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Keel protection

Below is a pic of the keel of an Endeavour Power Cat. Does this type of keel design provide immunity to crab pots, lines and nets?
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Old 12-04-2014, 08:22 AM   #2
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Here is a better pic of the Endeavour Power Cat keel. Almost certainly it provides a lot of protection to the prop and shaft on grounding but I was wondering if lines could still wrap them.
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Old 12-04-2014, 10:26 AM   #3
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That keel/prop design should take care of 99% of crab traps that you encounter. But once a line is wrapped around that prop, it won't be easy to get off. It will almost certainly require a diver.

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Old 12-04-2014, 11:49 AM   #4
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certainly better than an open prop but crab pots are devious critters so I would not go driving through a field of them.
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Old 12-04-2014, 02:39 PM   #5
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I can't see that being efficient - plus, getting in there to clean out and paint those pockets, having to remove the rudder to get out the wheel (probably), servicing the cutlas bearing? Another of those designs for things that were never intended to be serviced.

What happens if you do touch ground? 4 times the areas to be repaired? No thanks!
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Old 12-04-2014, 04:21 PM   #6
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This is what a previous poster used specifically for crab and lobster pots in the northeast:

Prop protection

He reported some parasitic drag from it. Dragging sea weed on the grating might be another issue. Guess a shaft mounted line cutter is the best approach. Certainly don't plan to intentionally run over crab or lobster pots but my previous experience on the Indian River is they are hard to avoid if you go out of the channel even a small amount.
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Old 12-04-2014, 05:17 PM   #7
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Looks a well protected prop, but what`s the effect of boxing it in on prop walk for maneuvering?
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Old 12-04-2014, 06:12 PM   #8
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Those cages are common on downeast boats. Some have cages, others line cutters and many have prop cleanouts. The cleanouts are covered boxes, above the prop and waterline that give access to the propeller and shaft while the boats in the water. A knife mounted on a stick can take care of a tangle in minutes without having to dive.
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Old 12-04-2014, 06:46 PM   #9
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I cant imagine that power cat rudder is very effective tucked away like that.
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Old 12-04-2014, 06:56 PM   #10
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Greetings,
Mr. tt. I would think the rudder would be more effective being directly in line with a "contained" discharge from the prop "tunnel"...no?
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Old 12-04-2014, 06:57 PM   #11
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Quote:
Originally Posted by Donsan View Post
This is what a previous poster used specifically for crab and lobster pots in the northeast:

Prop protection

He reported some parasitic drag from it. Dragging sea weed on the grating might be another issue. Guess a shaft mounted line cutter is the best approach. Certainly don't plan to intentionally run over crab or lobster pots but my previous experience on the Indian River is they are hard to avoid if you go out of the channel even a small amount.

That would be my cage. As to prop walk effect, never had much to begin with, so the effect is negligible. Besides, have both a bow and stern thruster.

No growth at all on the cage (in these northern waters) since I prepped the SS of the cage per Pettit's instructions and then anti-foul painted it.

Yes, some drag with a minor negative effect on fuel burn at normal cruise. And some cavitation noise if I try to push the revs up beyond a couple of hundred over normal cruise.

But it sure is nice, and gives great peace of mind, to be able to steer a straight line through the local "mine fields" of lobster pot buoys. If you haven't been to Downeast Maine, you would have no idea of, and would be amazed at, the density of these buoys.

Just have to be careful backing up.
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Old 12-04-2014, 07:05 PM   #12
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Greetings,
Mr. tt. I would think the rudder would be more effective being directly in line with a "contained" discharge from the prop "tunnel"...no?

Yes, when the props are thrusting, i suppose that would be true. But under any sort of glide?
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Old 12-05-2014, 12:39 PM   #13
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Yes, when the props are thrusting, i suppose that would be true. But under any sort of glide?
On the opposite side of that coin, she might have better directional stability. Steering a straight line for long periods would be easier for the helmsman or autopilot.
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