Author Topic: Bollard Pull for Tug Towing  (Read 8633 times)

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sea.mariner

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Bollard Pull for Tug Towing
« on: November 04, 2009, 01:59:29 »
What is the 'normal' or 'ideal' Bollard Pull for a twin screw tug for a tug towing competition ?

Regards, Dan.
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Eddy Matthews

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Re: Bollard Pull for Tug Towing
« Reply #1 on: November 04, 2009, 02:08:15 »
Good question Dan - I would imagine the answer is "As much as you can get"....

But following on from that, how exactly is the bollard pull measured? What equipment is used, is it available so we novices can check our own?

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Eddy

sea.mariner

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Re: Bollard Pull for Tug Towing
« Reply #2 on: November 04, 2009, 02:30:17 »
I think I am correct but not sure .... If you look back at the photo of Red Hamish in his waders (Happy Holloween Thread) I think you can see the tug attached to a set of fishing scales that are secured to the quayside, then I guess it is a gradual increase in power to see what it pulls on the scales ?? Probaly measured in pounds ?

I am sure we will get the info we need on here  ;)

Regards, Dan.
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sea.mariner

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Re: Bollard Pull for Tug Towing
« Reply #3 on: November 04, 2009, 10:42:07 »
This is the photo I was referring to earlier, it looks like a bollard pull test to me  :)
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Adam66

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Re: Bollard Pull for Tug Towing
« Reply #4 on: November 04, 2009, 11:43:22 »
I would imagine the answer is "As much as you can get"....

I think its more as much as you can handle. The skills of the captain makes how good a tug gets.
A tug with a high BP with a unskilled captain is worth nothing, a skilled captain with a lower BP can still get a good result.

At the M@ilLine we use a digital version of a spring balance for measuring the BP with a scale form 0-10kg with two digits behind the comma.

My Havila Champion pulls a 3.25kg

« Last Edit: November 04, 2009, 12:01:37 by Adam66 »

ministeve

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Re: Bollard Pull for Tug Towing
« Reply #5 on: November 04, 2009, 15:31:11 »
as aleady mentioned it depends on the capitan but to give an idea the avarage tugs that are towing that i see are pulling between 5 to 9 pounds on fishing scales and max i have one that pulls 12 pounds no need for a tug to pull more than 7-8 pounds realy.
having sed that we tow anything from 8 feet to 15 feet long not the little tows that are about (down south  :D :o ) sorry hehe no one down there wants to play with us except ray  :'(
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sea.mariner

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Re: Bollard Pull for Tug Towing
« Reply #6 on: November 04, 2009, 23:00:15 »
Cheers Adam66 & Ministeve, I think my question has been answered by you both  ;) ;)

7 - 8 pounds of Bollard Pull with a skilled Captain  :)

Kind Regards, Dan.
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Adam66

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Re: Bollard Pull for Tug Towing
« Reply #7 on: November 05, 2009, 09:58:33 »
The 3,2kg of my Havila Champion (1.30m) is more than enough to tow our MailLine tanker (3.5mtr and 200kg) around
Actually is way to much BP.
Its much nicer and more realistic to tow with less power.

sea.mariner

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Re: Bollard Pull for Tug Towing
« Reply #8 on: November 05, 2009, 10:03:07 »
Now then Mr Adam66, can we see some photos please of your Havila Champion and hopefully some of it towing   ;) ;)

Regards, Dan
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ministeve

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Re: Bollard Pull for Tug Towing
« Reply #9 on: November 05, 2009, 11:33:26 »
200kg thats nowt try 1.5 tonne and 15 feet long thats fun in a good cross wind  :) :) :)
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model tugman

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Re: Bollard Pull for Tug Towing
« Reply #10 on: November 05, 2009, 11:38:44 »
Hi Ministeve    we are gradually catching you up we now have a 16ft towboat
« Last Edit: November 05, 2009, 11:45:16 by model tugman »
Tugs are for life      George B

Model Tug Man

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Re: Bollard Pull for Tug Towing
« Reply #11 on: November 05, 2009, 11:42:38 »
Horse power in the wheel house is what it is all about. I have seen tugs with it :) :) and tugs without. :o :o
VGJQ

sea.mariner

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Re: Bollard Pull for Tug Towing
« Reply #12 on: November 05, 2009, 11:49:44 »
Hi Ministeve    we are gradually catching you up we now have a 16ft towboat

I think I should have moved South when I left Newcastle not North to Aberdeen but then again I wouldn't have my lovely wife  :D

Why are there no tug towing interests up here  >:( >:( >:( >:(

Great photos George  ;)

Regards, Dan.
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ministeve

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Re: Bollard Pull for Tug Towing
« Reply #13 on: November 05, 2009, 12:11:23 »
your wife is more important dan who would bring the cups of tea in the middle of a big build lol  ;D ;D
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Footski

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Re: Bollard Pull for Tug Towing
« Reply #14 on: November 06, 2009, 01:01:59 »
Well Dan, That makes two of us...... ??? ??? ??? ??? You are too far north and I am too far south.. >:( >:( >:(
Barry