15 m (50') semiplanning boats

[Guillermo]

Dear all,
I'm trying to gather information on retro-looking, nice lined, seaworthy and low powered mono-hulled sport-fishing boats around 50' (everything: old, new, production boats, one-offs, just designs, etc), designed to usually trawl at around 7 knots, but able to efficiently go up to 14-15 knots (at its most) when needed.
Cruisers easily convertible to sport-fishing trawling will also be useful.
All contributions will be greatly appreciated.

Cheers.

[MikeJohns]

Guillermo
How retro? what sort of era and materials? Not sure how low powered you want for that 15 knots.

Off the top of my head something along the lines of;
Grand Banks 45 or a 59
or a Bertram 50 or 58 with smaller engines perhaps ?

[yipster]

Hi Guillermo, same questions as MikeJohns here plus my own fantasy
first thought went to MTB boats but you look for semi-displacement boats
as you know semi-planning hulls operate at a Fn of 1.0 to 3.0
half gliders perform best over Fn 2.0 but want a low deadrise hullform
here a 18 meter halfgliding riverboat to raised pilothouse cruiser conversion

[Guillermo]

Thanks, Yipster and Mike.
Something in the line of classic motoryachts from the first half of the last century. Two-three days 20-30 miles offshore trawl-fishing for 4 persons scheme, but room up to six when in coastal cruising. Accomodotion forward, ample fishing cockpit astern. No flybridge or tower. Wood (traditional or modern) as preferred material, but can be any other. Power no bigger than 300 HP.

Something like this, but more ample, only partial covered cockpit: http://www.classicmotoryachts.com.au...c_monohull.htm
Or in the line of the the Hinckley T44, but semiplanning....or the Andreyale 50' but with an stern cockpit....etc, etc.

Cheers.

[marshmat]

A bit of hunting for such craft at the local boatyards turns up.... well, not much. Most of the local fleet falls into one of three groups: fin keel sailing monohulls, sailing dinghies, or overpowered, overweight fat-butt planing hulls.

(First 3 pics)
The Ellis 40, http://www.ellisboat.com/ellis40.php A fair hair smaller than your 15 m target range, but they claim a 12 to 20 kt cruise and 26 kt top end on a single 500 hp diesel. I'd guess she'd fit your speed range well with a 300 hp? Nice Downeast lines in the hull and gorgeous topsides styling in several versions. Is this the kind of hull you're thinking of?

(4th pic)
Here's something listed for sale in Portland, ME http://portlandme.kijiji.com/c-Cars-...QAdIdZ31321408 Somewhat stouter and more traditional looking, big open cockpit, massive DD 6-71.... inspired yet?

[Guillermo]

Thans Marshmat,
The profile of the blue Ellis 40' is quite the idea.

Cheers.

[yipster]

you said it, why not a older stylish fishing battlewagon without the tower? i'll keep an eye open for such designs, if any
yes i'll get the idea, you show the sheer, a "bakdek" in dutch, nice and practical lines but on semiplanning read Raymond Hunt
i'll say jokingly a cat can do 15 knts easy at way lower consumption, only wish i knew how a twenty's cat would have looked like

[Guillermo]

Grand Banks 49, as suggested by Mike, looks fine, but our boat needs to be semiplanning and bigger cockpit.
http://www.grandbanks.com/yachts/eas...hx/gallery.cfm

[Guillermo]

Yipster,
this boat is not intended to cruise at semiplanning mode, but in displacement mode. The semiplanning mode is only necessary to come quickly ashore when offshore fishing and deteriorating weather is announced.

Cheers.

[Guillermo]

Tad Robert's Passagemeker Lite concept could be also applicable, with some modifications and asuming somewhat lower speeds in the range of 12-13 knots....mmmm...
http://www.passagemakerlite.com/desi...kerlite-46plus

[Ike]

Perhaps you are looking for something along the lines of the Tom Fexas Midnight Lace design. http://www.tomfexas.com/midnightlace.html

[Guillermo]

Thanks, Ike. Interesting story. And interesting boat (the original 52).

Yipster,
I think you had some info on a 1929 Herreshoff design called "Stroller", didn't you?


Cheers.

[marshmat]

Herreshoff "Stroller" - mentioned briefly in an older thread on here at http://www.boatdesign.net/forums/sho...5&postcount=74

[Guillermo]

Thanks, Matt. Any more info on that boat?

[Tad]

The first of these is a Sparkman & Stephens design, Witch of the Waves, 45'LOA and runs almost 20 knots with twin Chrysler Imperial gas engines of 225 HP each.


Second is one of my favorites, Porpoise, a 60' Swordfisherman built 1951 and designed by Geerd Hendel. Twin 275Hp push her up to 20 knots, displacement only 47,500 pounds.


And finally Puffin, designed by Ken Smith, original Grand Banks designer. She is 42' by 13' displacement about 20,000 pounds. Twin 195HP GM diesels push her up to 19mph.