Bilgewater puzzler for you-how much water to sink my lady 4 inches?

[SoulFireMage]

We finally cleared 99% of the bilge water out after finding not one of the bilge pumps were working. Turns out that the fuses were hidden away and blown, and two pumps were seized.

The first 40 gallons didn't lift her much however as the bilges from the engine room is seperate we were able to simply shove a pump down with a hose to the outside and spend a while doing it manually.

This is my puzzle . I reckon we got rid of near 200gallons of water based on it taking me 20 minutes minimum to become so sore from lying were I was to get the pumps in all those spaces, and the pump getting rid of 750 gallons an hour.
However Dream Finder displaces 19 tonnes, is 52foot LOA, 14'9" in the beam and is now riding a good 4 inches higher than before.
Can any brainiacs here tell me how close my estimate really is?

 

[hlb]

Dunno, but I ftted bilge alarms last year, with a bloody great claxton, after to many occasions of pumps packing in and other failiurs.

 

[tugboat]

To calculate TPC (tonnes per centimetre immersion) you need to know the waterplane area in square metres. This is easy for a box-shaped vessel but more complex for ship-shapes. The designer of your vessel will have worked it all out and could give you the info. If you can make a half decent guesstimate from measurements the formula is

TPC = <u>1.025 WPA</u>÷100


Where 1.025 is the relative density of seawater.

 

[omega2]

one gallon of water weighs 10.25 lbs, one cubic foot = 6 gallons approx, so 52x14.5xdepth in bilge = ? If you reckon you removed 200 gallons that would be 200x10.25 = 2050lbs or just short of 1ton, not clear on how much you actually removed, ie the pump getting rid of 750 an hour.

 

[Divemaster1]

Don't know really, but I'd be more keen to know where it all came from and how to prevent it coming back in again. /forums/images/graemlins/crazy.gif

 

[SoulFireMage]

Re: Bilgewater puzzler for you-how much water to sink my lady 4 inches

Thanks guys . A tonne of water would explain the lift.

I think I know the answer to that-non working bilge pumps for a few years.

 

[Dave_Snelson]

Re: Bilgewater puzzler for you-how much water to sink my lady 4 inches

You mean the water was there for quite some time??

Did you taste it for salt or fresh? Gives you an idea where it came from! Crikey, I would leave it so long next time! /forums/images/graemlins/crazy.gif