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Old 04-29-2016, 01:42 PM   #1
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Pilot 30 Dead Rise

Would anyone know the Dead Rise of a Mainship Pilot 30 ? Getting a transducer installed and would like to know in advance.
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Old 08-09-2016, 09:50 AM   #2
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While I do not know....I am thinking damn near NONE!!! Might be a little but it is pretty damn flat back there
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Old 08-09-2016, 11:29 AM   #3
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Mainship seems to prefer very flat bottoms aft. The older 34 Mainship is flat at the transom. Zero deadrise. A very warped bottom going from a very skinny forefoot w steep deadrise and a narrow chine beam to totally flat bottom is extreme warp. "warp" as pertaining to hull design .. not a negative expression.

The perfect monohull for steep head seas but not the best for following seas. Everything is a compromise and I'll bet the Pilot is not as extreme as the M34.
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Old 08-09-2016, 11:45 AM   #4
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Originally Posted by Nomad Willy View Post
Mainship seems to prefer very flat bottoms aft. The older 34 Mainship is flat at the transom. Zero deadrise. A very warped bottom going from a very skinny forefoot w steep deadrise and a narrow chine beam to totally flat bottom is extreme warp. "warp" as pertaining to hull design .. not a negative expression.

The perfect monohull for steep head seas but not the best for following seas. Everything is a compromise and I'll bet the Pilot is not as extreme as the M34.
We call that a semi planing hull.... The aft portion provides the lift to be able to exceed hull speed....the fore section has little lift and is able to go THROUGH the seas.
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Old 08-09-2016, 02:06 PM   #5
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there are bubble level apps you can get for your phone.


put your phone where you want to mount the xducer and it will give you the degrees unless you picked a weird spot where the inside doesn't match the outside of the hull.
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Old 08-09-2016, 02:10 PM   #6
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A good installer will have access to two piece shims that you can rotate through an infinite number of angles.

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Old 08-09-2016, 03:05 PM   #7
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We call that a semi planing hull.... The aft portion provides the lift to be able to exceed hull speed....the fore section has little lift and is able to go THROUGH the seas.

HAHA What's "semi" about them?
Full planing hull IMO.
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Old 08-09-2016, 10:54 PM   #8
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HAHA What's "semi" about them?
Full planing hull IMO.
Nope....you said it yourself..."very skinny forefoot w steep deadrise and a narrow chine beam"....there is no lift in the front half of the boat. A full planing hull will have lift up front. The Mainship does not....as you stated.
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Old 08-10-2016, 07:16 AM   #9
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Mainship 34 Motor Cruiser

By Jack Hornor

Revised by BoatUS editors in October 2012


"The single engine, semi-displacement hull form with deep forefoot and a long deep keel actually more closely resembles Down East-style workboats and cruisers."

BoatUS - Boat Reviews - Mainship 34 Motor Cruiser
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Old 08-10-2016, 09:03 AM   #10
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Baker and psneeld,
Opinions Opinions,
Bow decides nothing. Stern shape tells all.
Planing

However it's heavy (sort of) and is designed for slow speeds. It's a good 20 knot boat w enough power. I know you're not going to like this but consider the QBBL.
Not at all what a SD hull should have. In fact the QBBL is going in the wrong direction .. slightly. It's ideal for a planing hull. A good SD hull should have some positive number. And perhaps some rocker. The Mainship 34 is slightly negative. Negative QBBL bottoms are not the stuff of SD. It's a fact. But you could probably fine another twelve people to say it was/is a SD hull. Would'nt change a thing.

Lots of trawlers have a planing hull but are'nt considered planing because they have a keel larger than most planing craft. Island Gypsy is one. Zero degrees QBBL ... that's what most all planing hulls have. And for very good reasons. Calling the IG a planing hull is not really correct as it's designed for SD speeds. But the hull is a planing hull. Take the keel away and unload a lot of weight and you have a fairly typical planing hull w/o changing the hull at all. Same w the M34.

But you and most others call them SD hulls. Actually this could be resolved by calling them SD boats. If you leave the hull shape out of it, it's much more correct. Because the whole boat as a package is a SD boat. Has stuff (weight and keel) that are not found on planing hulls .. hulls.

So SD boats are fine (at least ok) but not SD hulls. But IMO if you have the stuff of SD on a hull (big keel and big weight) the hull shape should match .. it should have a SD shape .. and that includes a bit (or more) positive QBBL angle. Like the GB42 w 120hp. Powered for FD but the hull is SD. The GB42 single would be a better boat if it had a FD shaped hull aft. The problem w having it is that it limits a boat's speed. So if one were to repower w considerably more power the boat would squat at the higher speeds. Boats are'nt like cars where some are offered w a 4, 6 or 8cyl engine and all are legitimate. Boats are designed for a narrow range of speeds.
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Old 08-10-2016, 09:53 AM   #11
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The bottom is not really flat. Sort of flat but not flat like a planning hull.
I had one and painted the bottom many times. LOL

Here's a picture of the bottom of my old 78 Mainship I. It's not the greatest angle to see the bottom but it's not really flat.


Actually the aft end of the bottom on my 40 Albin is much flatter (I would call it flat) than the Mainship.
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Old 08-10-2016, 10:04 AM   #12
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Jay,
Would like better pics.
The one above looks like fast SD but one needs the whole picture.

The question is'nt about flatness but the angle of the bottom aft re a horizontal plane. The round bilge has little to do w it but the bottom rising up aft does. Nordic Tugs have a little rocker and thus have a small amount of positive QBBL. If the bottom ramps up to the surface (of the water) it's FD .. if it ramps up part of the way it's SD. If it ramps up not at all it's a straight line and a planing hull.
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Old 08-10-2016, 10:19 AM   #13
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Uggghhhh. Eric, we have been here before. A Semi-PLANING hull has areas that do not produce lift. And who said anything about a keel. While a keel may cause issues with planing or speed, it has nothing to do with hull shape. It is something that is added for certain reasons. A common semi-"displacement" hull starts out with a very deep forefoot and slowly flattens out through the length of the hull. Flat enough to where if there is enough power, it will have enough lift to plane. A planing hull like a modified V will have enough "flat" sections forward to to create lift. I have owned and operated both. To be honest, most planing boats have MORE deadrise at the stern because they can afford it....deadrise softens the ride which is why manufacturers brag about it. THere is enough lift though the entire hull that they can leave VEE throughout the length of the boat to soften the ride. It does come at a performance penalty.


You know what the real test is Eric??? If you are on plane in a SD boat and turn, the boat will NOT bank into the turn. It will remain flat. A planing hull will bank. It is a slightly odd feeling and it looks strange as an outside observer. A Mainship will remain flat thru a turn. My Carver will not. I did look thru my old pics and the Mainship Pilot is not as flat as I thought...
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Old 08-10-2016, 10:23 AM   #14
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Old 08-10-2016, 10:26 AM   #15
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Pilot 30 Dead Rise

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Damn Baker, Flyin Low had great lines. Even in the slings.
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Old 08-10-2016, 10:28 AM   #16
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And the deadrise aft. I did not have a pic of the entire transom but you can see the deadrise. This is a Mainship Pilot II...the transition from no lift to the planing sections of the hull is more pronounced with the keel cut away. The first generation Pilot carried that keel all the way aft. Eric, if you were to argue that the Pilot II was closer to a planing hull than the first generation Pilot, I would agree. Mainship did a great job of capturing the benefits of a SD hull while also maximizing the benefits of a planing hull. This boat is almost two different hulls glued together where the keel is cutaway. The result is a faster more efficient hull with good seakeeping abilities.
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Old 08-10-2016, 10:34 AM   #17
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Damn Baker, Flyin Low had great lines. Even in the slings.
I agree....I VERY good looking boat. ANd strangely, while the color of the gelcoat has nothing to do with the lines, it sure makes a big difference in the appearance department.
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Old 08-10-2016, 10:36 AM   #18
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Carver modified V....you see hoe much lift is up front???
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Old 08-10-2016, 11:56 AM   #19
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Uggghhhh.

You know what the real test is Eric??? If you are on plane in a SD boat and turn, the boat will NOT bank into the turn. It will remain flat. A planing hull will bank. It is a slightly odd feeling and it looks strange as an outside observer. A Mainship will remain flat thru a turn. My Carver will not. I did look thru my old pics and the Mainship Pilot is not as flat as I thought...
Actually, it kind of funny feeling but the old Mainship leans OUT in a turn. It's kind of a freaky feeling the first couple of times.
So I used to do a hard turn to "rattle" any first time guests I had. Just for my fun of course.
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Old 08-10-2016, 11:58 AM   #20
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[QUOTE=Nomad Willy;468240]Jay,
Would like better pics.
The one above looks like fast SD but one needs the whole picture.
QUOTE]

Unfortunately that's about all I have.
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