Closing seacock of generator while underway or not ?

[stelican]

But you can "be tossed" to comment on something you have not read ?

Calm down Tiger , I did read few replies!

 

[PaulRainbow]

Calm down Tiger , I did read few replies!

But you said "Can't be tossed to read thread"

 

[Mr Googler]

Blimey…..things a bit aggy in this thread….dont know why….its not about anchors

 

[john_morris_uk]

As I said all seacock need exercising.
Don't think I would benefit from trawling through the whole thread.

If you read the whole thread you’ll discover that everyone agrees that seacocks need exercising.

However well designed installations mean that seacocks don’t need to be closed when not in use.

It was your assertion that seacocks ought to be closed that was being questioned. It’s simply not necessary.

 

[Portofino]

Here’s some info on the water pressure under a hull planing .
The solid black is pressure lifting the bow up .The white @ the posterior region is - ve that’s why the stern tends to sink planing .
50:50 is equal , more or less around the red line .

A seacock in those blue areas will definitely suck water out as -ve .

But equally a seacock in the heavy black dotted will pressurise as ARE correctly says and as I said just might get through a rubber impeller and start filling the exhaust manifold etc etc .

Obviously the pressure area on your particular vessels varies……speed , deadrise, hull L and other dims etc etc .
Never the less it’s not a done deal to dismiss this issue with a flippant “ BS “ .

It really does depend .




Extracts from Lindsay Lords book .”Architecture of planing hulls “ For clarity the lift area will be + ve pressure , so seacock here will have ingress of water .

Reading this book could save some folks future embarrassment

 

[stelican]

But you said "Can't be tossed to read thread"

Don't take it personally.
Do read post 32 which is very enlightening.

 

[stelican]

Blimey…..things a bit aggy in this thread….dont know why….its not about anchors

He does get excited!

 

[PaulRainbow]

Don't take it personally.
Do read post 32 which is very enlightening.

How is that relevant to your saying you didn't read the thread, then saying you did read it ?

 

[aerobat]

Here’s some info on the water pressure under a hull planing .
The solid black is pressure lifting the bow up .The white @ the posterior region is - ve that’s why the stern tends to sink planing .
50:50 is equal , more or less around the red line .

A seacock in those blue areas will definitely suck water out as -ve .

But equally a seacock in the heavy black dotted will pressurise as ARE correctly says and as I said just might get through a rubber impeller and start filling the exhaust manifold etc etc .

Obviously the pressure area on your particular vessels varies……speed , deadrise, hull L and other dims etc etc .
Never the less it’s not a done deal to dismiss this issue with a flippant “ BS “ .

It really does depend .

View attachment 193748

View attachment 193749
Extracts from Lindsay Lords book .”Architecture of planing hulls “ For clarity the lift area will be + ve pressure , so seacock here will have ingress of water .

Reading this book could save some folks future embarrassment

I,m not joking , according to this picture my s**thouse is ready to explode when i open her up to go on plane . The flushing water pickup is exactly in the heavy black area

 

[47GC]

I,m not joking , according to this picture my s**thouse is ready to explode when i open her up to go on plane . The flushing water pickup is exactly in the heavy black area

What a load of $hit….

 

[sharpness]

Reading this book could save some folks future embarrassment

I can’t be tossed to read that book …..

 

[stelican]

How is that relevant to your saying you didn't read the thread, then saying you did read it ?

Selective reading, Calm down.

 

[PaulRainbow]

Selective reading, Calm down.

Perfectly calm, just pointing out your nonsense.

 

[stelican]

Perfectly calm, just pointing out your nonsense.

Calm down switch off the forum and go boating

 

[stelican]

Daughter does her boating Hamptons in summer Florida/ Bahamas rest of the season
Has been doing so for many years.
Boat suffers from extensive marine growth in A/C Chillers and engine cooling systems whilst in South
Has neutra salt systems fitted which has greatly slowed down growth.
Seacocks closed prior to neutra salt flushing and seacocks left closed until boat used again.
Another advantage of closing seacocks.

 

[PaulRainbow]

Calm down switch off the forum and go boating

 

[john_morris_uk]

Daughter does her boating Hamptons in summer Florida/ Bahamas rest of the season
Has been doing so for many years.
Boat suffers from extensive marine growth in A/C Chillers and engine cooling systems whilst in South
Has neutra salt systems fitted which has greatly slowed down growth.
Seacocks closed prior to neutra salt flushing and seacocks left closed until boat used again.
Another advantage of closing seacocks.

Good for her and you. But you’ve yet to h explain how closing the seacocks all the time is helpful. In practice it’s a PITA. The seacocks are there in case there’s a problem. Not necessary to close them at every opportunity.

 

[oldgit]

never ever bothered in last few decades..................

 

[SC35]

I prefer to keep the black water tank seacock closed apart from when it's being pumped out.
There is no real science behind this apart from "warm fuzzy feeling" and that the manual says it's good practice.




With a generator, I would be nervous that I would forget that the seacock was closed, start the generator, then be presented with the smell of overheating machinery and a shrinking wallet.