Boat Weight & Performance Curves

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RWS
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Boat Weight & Performance Curves

Post by RWS » Sat Jul 14, 2018 6:38 am

Something to consider:

The published dry boat weight for a 10 meter is 12,000 lbs.

That's the number I used when we calculated the first set of props for the new diesel engines in 2005

Those diesels are a bit lighter than the 454 Crusaders they replaced

Filled the boat with 242 gallons of fuel, 17 gallons of genny tank fuel and 40 gallons of water for her first test run with those diesels, and loaded her back with all the tools, spares, dishes, etc.

Put her on the travelift - SURPRISE - SHE WEIGHS IN AT nearly 18,000 lbs !!!!!

It is my own guess that the published dry weight is for the base boat, with zero options.

Once you add in the generator, additional sound insulation, wetbar, the L bench seat, the aft bench seat, windlass, microwave, anchor, anchor chain, tools, spares, icemaker, refrigerator, has grill, full fridges of drinks, sodas, beer, and other assorted stuff you get to that actual travellift weight.

My point here is that the performance claims are likely made for naked boats, with little or no options low fuel and probably one operator on board.

In this case even after adding in a full tank of fuel and water, the additional weight is well over 20% of the original published number.

Bottom line - one cannot expect to attain factory performance numbers with a heavily optioned boat.


RWS
1983 Trojan International 10 Meter
Twin Yanmar 315 Turbodiesels
Solid Glass Hull
Woodless Stringers
Full Hull Liner

Trojan International Website: http://trojanboat.com/

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prowlersfish
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Re: Boat Weight & Performance Curves

Post by prowlersfish » Sat Jul 14, 2018 1:05 pm

That something I have always said . Great post !
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

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RonW
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Re: Boat Weight & Performance Curves

Post by RonW » Tue Jul 31, 2018 4:05 pm

When I bought my 454 powered 1975 44 FBMY as the second owner, it came with the original Owner's Manual.... a typed 3 ring binder.
In it, it claimed 27 mph top speed. I laughed because we cruise at 12 mph and I never pushed it. This is a fully loaded boat with every factory option along with the previous owner's Admiral's wishes including a dishwasher, garbage compactor and central vac.
But this year, I "fixed" the trim tabs (by blocking them down) and on my way back from fully fuelling, I got it up to 22 mph. I was amazed. That was about 7 mph more than I expected.
Nice to know I've got it if I need it, but I would need a fuel tanker to follow me to make it anywhere.

Ron

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