Which way round do you fit your anode?

Which way round do you fit your anode?

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PhillM

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I fitted my anode today with the thinner end forward and fat end aft. Seemed logical to me as its more streamlined. Couple of chaps from one of the boat services businesses commented that I had it the wrong way round. So, I wondered, what do other people do? (I would have just looked at other boats, but there are too few of us out of the water at the moment, to get an idea).
 
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Fat end forward; think fish and Boeing 747s. Thin end forward might seem more streamlined but the fat end aft creates turbulence behind it = drag, albeit a small amount.
 
Only anodes on the current boat are special ones on the saildrive, but on the previous boat I fitted the pear anode fat-end-forward.

Pete
 
brman said:
Err, you might want to watch the slow motion bit of this video (30sec in).... https://www.youtube.com/watch?v=bUfRt3YaaLQ
;)
Click to expand...

Yup, contrary to popular misconceptions, a liquid droplet free falling in air forms a perfect sphere. That is how they used to mass produce round shot for shotgun shells by the way, by dropping molten lead through a sieve at the top of a tower into water at the bottom of the tower
 
Bru said:
Yup, contrary to popular misconceptions, a liquid droplet free falling in air forms a perfect sphere. That is how they used to mass produce round shot for shotgun shells by the way, by dropping molten lead through a sieve at the top of a tower into water at the bottom of the tower
Click to expand...

WEll i've learned something today!
 
I was told by a reputable marine engineer that a prop shaft anode should be fitted fat end forward, to allow maximum flow into/over the cutlass bearing.
 
Bru said:
Yup, contrary to popular misconceptions, a liquid droplet free falling in air forms a perfect sphere. That is how they used to mass produce round shot for shotgun shells by the way, by dropping molten lead through a sieve at the top of a tower into water at the bottom of the tower
Click to expand...

I helped on a delivery from Bangor North Wales and all the boats in the yard had them thin end forward. When I mentioned it the guy there said he knew it was different but everyone else was wrong!
The shot tower in the middle of Bristol is still there.
Allan
https://en.wikipedia.org/wiki/Cheese_Lane_Shot_Tower
 
Allan said:
I helped on a delivery from Bangor North Wales and all the boats in the yard had them thin end forward. When I mentioned it the guy there said he knew it was different but everyone else was wrong!
The shot tower in the middle of Bristol is still there.
Allan


https://en.wikipedia.org/wiki/Cheese_Lane_Shot_Tower
Click to expand...

and another just south of Hobart in Tasmania

http://www.discovertasmania.com.au/attraction/theshottower

Jonathan

edit: In fact they are common place, well almost, with another one in Melbourne

https://en.wikipedia.org/wiki/Coop's_Shot_Tower

close edit
 
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Bru said:
Yup, contrary to popular misconceptions, a liquid droplet free falling in air forms a perfect sphere. That is how they used to mass produce round shot for shotgun shells by the way, by dropping molten lead through a sieve at the top of a tower into water at the bottom of the tower
Click to expand...

One of the biggest factories for making shotgun cartridges, and other gunpowder-connected weaponry was at the Kynoch factory at Arklow, Eire.
A whole village was built by the founder/owner with schools, a hospital, etc etc.
That's how the name Ely Kynoch came into being, a name all the shooting fraternity will know well.

How's that for an irrelevant (to the OP) piece of information !! ;)
 
Robert Wilson said:
One of the biggest factories for making shotgun cartridges, and other gunpowder-connected weaponry was at the Kynoch factory at Arklow, Eire.
A whole village was built by the founder/owner with schools, a hospital, etc etc.
That's how the name Ely Kynoch came into being, a name all the shooting fraternity will know well.



How's that for an irrelevant (to the OP) piece of information !! ;)
Click to expand...

With more information here

https://en.wikipedia.org/wiki/Kynoch

I knew of it as part of ICI's Nobel Division and then as part of IMI.
 
Robert Wilson said:
When I were at skool, I were told by teacher that Isambard Kingdom Brunel realised that swallows have plump chests and long, tapering tails - so he built his ships with narrow sterns.

I have know idea whether or not that is true, but I always think of it when affixing my hull anode :encouragement:
Click to expand...
And every ex school boy has copied what IKB did ever succeed because their teacher said that's the way to do it.
 
Bru said:
Yup, contrary to popular misconceptions, a liquid droplet free falling in air forms a perfect sphere.
Click to expand...

Now the thread has gone completely off topic, I need to point out this isn't completely true ;)

It will actually form anything from a sphere to a flat burger shape to an umbrella shape, and any wobbly shape inbetween. It all depends on the size of the drop and the type of liquid vs the air resistance. I think raindrops go through a round->flat bottom->burger->umbrella->break_up_and_back_to_round as they collide and join together when falling.
Now I need to do something useful instead of watching youtube videos of water drops falling :(
 
brman said:
Now the thread has gone completely off topic, I need to point out this isn't completely true ;)

It will actually form anything from a sphere to a flat burger shape to an umbrella shape, and any wobbly shape inbetween. It all depends on the size of the drop and the type of liquid vs the air resistance. I think raindrops go through a round->flat bottom->burger->umbrella->break_up_and_back_to_round as they collide and join together when falling.
Now I need to do something useful instead of watching youtube videos of water drops falling :(
Click to expand...

Well yes, since you mention it there is a size limit for the perfect spherical drop. I did however say droplet implying that small is beautiful in this context :D
 
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