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inebriated

fuel ballast

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Hey guys

This might be a silly question/proposal, i don't know much about the properties of diesel

But i watched the Comanche tour, and Ken Reid was saying that the fuel weight savings on Comanche was significant due to grinding pedestals instead of powered winches

But then i hear about the boats all relying on water ballast to help RM in conjunction with the keel

I was just wondering why the boats don't use the diesel as ballast and have two tanks on either side that the fuel switches between

I'm guessing people have thought about this before and there is a logical reason why so this may be a silly question sorry

Maybe the weight of the extra tank? or pump?

Or do they actually do this and i don't hear about it?

I don't really know that much as you may have already found out

I need a bit more time reading hahaha

cheers

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They don't carry enough fuel for it to be worthwhile. 

They can dump all the water when they want, they can't dump fuel. 

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13 minutes ago, Moonduster said:

The ISAF, as I recall, prohibits using fuel as moveable ballast.

Equipment Rules of Sailing is the place to check.

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Same reason that you don't use fresh water store as ballast - you have to be prepared to dump the lot in a hurry and not have your judgement clouded by the value of the ballast

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Also diesel is less dense so less RM for a given volume (can't get as much weight outboard)

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On 1/13/2018 at 3:20 AM, teamvmg said:

Same reason that you don't use fresh water store as ballast - you have to be prepared to dump the lot in a hurry and not have your judgement clouded by the value of the ballast

Or the illegality of dumping diesel at sea. 

Allowing anything other than seawater ballast tanks is going to end up with bad consequences somewhere down the line no matter what. 

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