Assessing Weight Distribution in a 25 T Jason

BillD

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Today I rearranged the water filled weight barrels in the 25 T Jason.

The four 230 lbs barrels (30-32 gals of water each) are positioned about where the 45-50 gal fuel tanks will be under the deck.

The boat sits nicely balanced in the water with a simulated full load of fuel plus some additional weight of gear on the cockpit deck.

Tomorrow I'll take a final sea trial run or two with maybe two more 230 lb barrels of water up front on either side of the existing engine box to simulate the weight of moving the engine back 14-16 inches and a couple of adults.

I'll run the boat @ WOT (figure 13-14 knots) and try and figure out if lifting rails will be worth the hassle and also get an accurate estimate on what the boat will run "heavy" with some more hp.

FWIW, Bill D

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Toolate

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You sure that thing wont last another season? Fresh spray paint and duct tape would be a lot less work...Looks like my engine (there is duct tape on the exhaust hoses from prior owner).

Looks like that weight is pretty evenly distributed. Doesnt really look like the rear of the boat is noticeably lower than the bow either.
 

cb34

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Fuel tanks

Bill, why are you thinking about two tanks? One tank holding 50 gallons of fuel should be more than enough. Hell 50 would last a month running around pulling your pots.
 

BillD

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Bill, why are you thinking about two tanks? One tank holding 50 gallons of fuel should be more than enough. Hell 50 would last a month running around pulling your pots.

I want the option of running this rig out to Halfway Hump, Jeffreys, etc. for bottom fishing. I don't want to be limited on fuel. :D

Nice to have the fuel capacity. No need to carry all the fuel around.;)
 

cb34

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fuel

Bill, understood. I can fish Jeffreys for the day as far as the outer Pigion and burn 35 gals. You should be able do the same with 20 gallons;). One tank is so simple......
 

BillD

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Bill, understood. I can fish Jeffreys for the day as far as the outer Pigion and burn 35 gals. You should be able do the same with 20 gallons;). One tank is so simple......

Will,

Thanks for the fuel burn data on your 30 CB/Cummins QSB 380.
I'll use it as a reference for fuel burn on a smaller hp engine.

There's a good chance this will be the only boat "in the family". I want to keep ALL the cockpit space I can. (no stern tank)

Also, I have to "open up the deck" to do some exhaust work if I replace the Volvo. I'll hack the rest of the deck up and do it right with two tanks and a balance line.

Not that much more work. I have access to very $inexpensive$ "demolition help", a heated building and it's a LONG winter. :D

I'll keep ya posted.

Bill D
 

DBM

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Raider Ronnie

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BillD.

I agree with you on the two tanks. I'm using our boat differently but i have two fuel and two water tanks and they all stay half full. I'm hoping to do some longer runs up to coast and want the capacity to run for a day without stopping. It didn't cost that much more to build her that way.

DBM



That was my exact thinking when I raised my deck over the winter.
The extra height gave me 4+ inches the expand my 2 fuel tanks and the cost wasn't that bad to enlarge my 2 existing tanks.
It's nice to have the extra capacity when you need it but doesn't mean you have to fill & carry that weight all the time, so fill 1/2 way :D
 


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