Which Hull to Build

Tuna Pursuit

Rear Admiral
Joined
Feb 26, 2012
Posts
1,684
Likes
664
Location
Beverly ma
Website
www.oliverwelding.com
Boat Make
Thunnus
I'm looking for opinions on the 34' H&H or 34' CB jr. Looks like the H&H is a little bigger with a deeper draft, wider and longer, almost a 35'. I'm trying to squeeze as much into a 34' since I'm limited to a 34 on my mooring. I would buy a kit boat and finish locally. it will be set up for tuna fishing.
 

F/V First Team

Admiral
Joined
Jan 10, 2012
Posts
6,146
Likes
2,484
Location
Narnia
Website
www.otisenterprisesmarine.com
Boat Make
Northern Bay 36 - Modified
Never finished off an H&H 34, but I have done a CB 34. You can cram quite a bit in there, more so if you're incredibly clever.

Helpful tip, lose the wood. 3.5" below deck is quite a bit of space that gets lost.
 

BillD

Admiral
Joined
Sep 1, 2011
Posts
7,660
Likes
3,381
Location
Portsmouth NH, boating out of the mighty Merrimack
Boat Make
25 Terry Jason with Cummins 370 power
Never finished off an H&H 34, but I have done a CB 34. You can cram quite a bit in there, more so if you're incredibly clever.

Helpful tip, lose the wood. 3.5" below deck is quite a bit of space that gets lost.

Travis,

I know it's not to difficult but you lost me with "lose the wood".
Are you talking about deck stringers??
Explain please
 

BillD

Admiral
Joined
Sep 1, 2011
Posts
7,660
Likes
3,381
Location
Portsmouth NH, boating out of the mighty Merrimack
Boat Make
25 Terry Jason with Cummins 370 power
From Powderpro's 34 CB build

Seatrail numbers, 34 CB

Here are some pictures and performance #'s.

2,000 rpms: 26 mph 13.7 gph
2,200 rpms: 28 mph 16.2 gph
2,400 rpms: 30 mph 19.1 gph
WOT 2,650 rpms: 33mph 25.2 gph

At 2,600 rpms (redline) load is 93%.

These numbers are with a light boat and 6 people on board. Add about 1,000 pounds for a full tank of fuel and another 1,500 to 1,800 pounds of gear, equipment, etc. I would still expect the boat at 2,800 pounds heavier to do 29-30 mph. When the boat does get heavier, I may need to take an inch or two out of the pitch. Current prop is 26x28, 1.75:1 reduction, 500 hp QSC Cummins

Definitely a home run, although I'm not surprised with how light the boat is, how flat the stern is, and how much power the engine produces. That 8.3 Cummins has some serious power. I don't know what the weight of the boat is, but my dad and I were guessing around 14,500 pounds at sea trial. When loaded with fuel, gear, etc, probably about 17,500 pounds. I wish I knew what the weight was, but I don't know. What I do know is the boat jumps out of the water when you give it throttle.

One thing that is different on my boat than most other CB 34's is where we placed the motor. Calvin Beal Jr. suggested a 12'6" shaft length. I'm assuming most, if not all CB 34's have about that long of a shaft. I placed my engine farther aft with a total shaft length of 9'10". So my shaft is 2'8" (32") shorter than what is probably typical. I'm not saying that necessarily helped my numbers, but it may have. My dad and I believe in keeping weight out of the bow of the boat, and the engine is the heaviest single item in the boat, besides the fuel.

The CB 34 called SEACOCK participates in some of the lobster boat races. I think he told me that his engine produces around 540 hp, he has the same reduction as me (1.75:1) and the same or similar shaft length as mine does. He runs a 3 blade prop (mine is 4 blade) and I think he tops out at about 37-38 mph. His boat probably weighs about what mine does, but my cabin is taller and grabs a little more air.


This post edited by powderpro 10:13 PM 07/05/2010

FWIW,

Bill D
 

Powderpro

Admiral
Joined
Dec 3, 2011
Posts
4,168
Likes
4,319
Location
The Ocean
Website
www.oneilboats.com
Boat Make
O'Neil
I'm looking for opinions on the 34' H&H or 34' CB jr. Looks like the H&H is a little bigger with a deeper draft, wider and longer, almost a 35'. I'm trying to squeeze as much into a 34' since I'm limited to a 34 on my mooring. I would buy a kit boat and finish locally. it will be set up for tuna fishing.

Go 34' Calvin Beal and never regret your decision, trust me. The Calvin Beal will be faster with same weight and hp. The H&H is only 3" wider, 8" longer, and they will both fit a 28" prop. The CB 34' is a big boat and an impressive performer. Stewart can add 2" of height to the sheer of the hull, he calls it a "lift kit". I think it makes the hull look better and it gives you 2" additional height to fit your engine, he can also raise the height of the cabin to give you even more room for your engine. Raise the hull 2" and the cabin about 6" and you will have height for any engine you can imagine. I heard the new Volvo D13 800hp would make a nice motor for a Calvin Beal;).
 

Powderpro

Admiral
Joined
Dec 3, 2011
Posts
4,168
Likes
4,319
Location
The Ocean
Website
www.oneilboats.com
Boat Make
O'Neil
Go with a 420hp-500hp engine like the new 6.7 Cummins or the 8.3 Cummins and you will be smiling every time you hit the throttle. My 34 CB at 33 mph went arrow straight and handled perfectly at all speeds. You could not ask for a better 34' boat in my opinion.
 

BillD

Admiral
Joined
Sep 1, 2011
Posts
7,660
Likes
3,381
Location
Portsmouth NH, boating out of the mighty Merrimack
Boat Make
25 Terry Jason with Cummins 370 power
Go with a 420hp-500hp engine like the new 6.7 Cummins or the 8.3 Cummins and you will be smiling every time you hit the throttle. My 34 CB at 33 mph went arrow straight and handled perfectly at all speeds. You could not ask for a better 34' boat in my opinion.

But did your 34 CB "pound" in 2-4 footers like my 31 Blackfin does @ 23-24 mph?:(

Tired of getting hammered in the 31 BF but want to keep the speed in a DE :confused:

Wrestling with the speed of a skeg boat vs the comfort of a built down !!!!
 

jerseysportfisher

Rear Admiral
Joined
Feb 13, 2012
Posts
1,181
Likes
149
Location
Communist part of NJ
Boat Make
Bertram 33SF
But did your 34 CB "pound" in 2-4 footers like my 31 Blackfin does @ 23-24 mph?:(

Tired of getting hammered in the 31 BF but want to keep the speed in a DE :confused:

Wrestling with the speed of a skeg boat vs the comfort of a built down !!!!

Bill what do you consider pounding ???? I have fished quite a few times on a 32 FBC in snot , and that boat does not pound. For what its worth, i feel you have the best hull in the 31 class for offshore fishing above 20 knot. I would think a de running 16 knots would ride better, but not a 20 + when you start raising that bow out of the water.
 

BillD

Admiral
Joined
Sep 1, 2011
Posts
7,660
Likes
3,381
Location
Portsmouth NH, boating out of the mighty Merrimack
Boat Make
25 Terry Jason with Cummins 370 power
Bill what do you consider pounding ???? I have fished quite a few times on a 32 FBC in snot , and that boat does not pound. For what its worth, i feel you have the best hull in the 31 class for offshore fishing above 20 knot. I would think a de running 16 knots would ride better, but not a 20 + when you start raising that bow out of the water.

I'm old now, 60 yrs. old next year.:(

16 mph on the 31 BF Combi is barely on plane.

I'll give it a go next time out !!!!
 

jerseysportfisher

Rear Admiral
Joined
Feb 13, 2012
Posts
1,181
Likes
149
Location
Communist part of NJ
Boat Make
Bertram 33SF
I'm old now, 60 yrs. old next year.:(

16 mph on the 31 BF Combi is barely on plane.

I'll give it a go next time out !!!!


I was say a Downeast at 16knots rides better due to the bow being low in the water, what it was designed for. When you get them going fast and that bow comes up high, you have that big flat surface there, your Jannice has a big V there, it will ride better at higher speed, as it was designed, are you talking 4 foot chop, if you are your going to laugh, but try running her a little faster. You might be surprised with the results.
 

BillD

Admiral
Joined
Sep 1, 2011
Posts
7,660
Likes
3,381
Location
Portsmouth NH, boating out of the mighty Merrimack
Boat Make
25 Terry Jason with Cummins 370 power
was thinking the same thing, that 31' Northcoast/Blackfin hull is almost legendary in the NE for being a great sea boat......

No doubt a great sea boat!:D
25-26 mph no problem in most conditions.
Best hangon and keep wiping your eyes....and forget wearing sunglasses!

I'll have no problem settling down to 20-22 mph comfotable dry ride in one of the "faster DEs"
 
Last edited:

F/V First Team

Admiral
Joined
Jan 10, 2012
Posts
6,146
Likes
2,484
Location
Narnia
Website
www.otisenterprisesmarine.com
Boat Make
Northern Bay 36 - Modified
25 mph in 7 footers breaking on the starboard quarter, quite dry actually.
Only downfall is the trough when two waves converge and you drop into that hole, you lose some forward momentum for a few seconds.

*shrug*
 

F/V First Team

Admiral
Joined
Jan 10, 2012
Posts
6,146
Likes
2,484
Location
Narnia
Website
www.otisenterprisesmarine.com
Boat Make
Northern Bay 36 - Modified
Lose the wood referred to not having pressure treated 2x4's going across for floor supports, I probably wouldn't go with a plywood deck either, just a personal choice. A nice balsa cored panel would suffice, lay them up long enough to go across the entire span. Largest space unsupported would be a 4 foot span, hardly enough to raise concern. Build a mold and put some crown in your panels and adjust your stringer system accordingly.

Easy peasy
 

Tuna Pursuit

Rear Admiral
Joined
Feb 26, 2012
Posts
1,684
Likes
664
Location
Beverly ma
Website
www.oliverwelding.com
Boat Make
Thunnus
Go 34' Calvin Beal and never regret your decision, trust me. The Calvin Beal will be faster with same weight and hp. The H&H is only 3" wider, 8" longer, and they will both fit a 28" prop. The CB 34' is a big boat and an impressive performer. Stewart can add 2" of height to the sheer of the hull, he calls it a "lift kit". I think it makes the hull look better and it gives you 2" additional height to fit your engine, he can also raise the height of the cabin to give you even more room for your engine. Raise the hull 2" and the cabin about 6" and you will have height for any engine you can imagine. I heard the new Volvo D13 800hp would make a nice motor for a Calvin Beal;).

That sounds perfect.
 

BillD

Admiral
Joined
Sep 1, 2011
Posts
7,660
Likes
3,381
Location
Portsmouth NH, boating out of the mighty Merrimack
Boat Make
25 Terry Jason with Cummins 370 power
That sounds perfect.

TUNA,

if you are looking for some speed in a +30 DE, talk with Ken Flowers and take a peek @ his 33. The boat is a bit smaller than eithe the 34 H&H or CB.

Bolt a QSC 500 in it and the boat should move right along and have a really nice ride being a built down and all.

Just another choice to agaonize over !
 
Top Bottom