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-   -   What is your Bigness Factor? (https://www.cruisersforum.com/forums/f118/what-is-your-bigness-factor-100846.html)

Kettlewell 28-03-2013 11:40

What is your Bigness Factor?
 
Anchor size poll above. Take your main anchor weight in pounds (1 kg=2.2 lbs) and divide by your LOA in feet (1 meter=3.28 feet). The result is your Bigness Factor.

For example, my Finnsailor 38 carries a 45 lb. main anchor, so 45/38=1.18, or on the high side of what I have labeled "Normal."

Let the quibbling begin about the factor ranges!

motion30 28-03-2013 11:42

Re: What is your Bigness Factor?
 
I see no poll??

atoll 28-03-2013 11:46

Re: What is your Bigness Factor?
 
45 kg,19m boat=2.3!

Kettlewell 28-03-2013 11:51

Re: What is your Bigness Factor?
 
Sorry to the metric folks, but you have to convert to US measure then divide:

Quote:

45 kg,19m boat=2.3!
Should be 45 kg x 2.2 = 99 lbs. 19 m x 3.28 = 62.3 ft. 99/62.3 = 1.6 Bigness Factor

Kettlewell 28-03-2013 11:52

Re: What is your Bigness Factor?
 
Quote:

I see no poll??
At the top.

noelex 77 28-03-2013 11:55

Re: What is your Bigness Factor?
 
2.5 https://deephousepage.com/smilies/blush.gif
I always wave to the 1.0 as they drag past :)

colemj 28-03-2013 11:55

Re: What is your Bigness Factor?
 
I don't know what criteria you are using to define the categories, but our anchor was chosen from the manufacturer recommendation chart and it comes out as 1.4, which is almost BIB.

That seems an odd category for a standard recommendation.

Mark

atoll 28-03-2013 11:55

Re: What is your Bigness Factor?
 
Quote:

Originally Posted by Kettlewell (Post 1196876)
Sorry to the metric folks, but you have to covert to US measure then divide:



Should be 45 kg x 2.2 = 99 lbs. 19 m x 3.28 = 62.3 ft. 99/62.3 = 1.6 Bigness Factor

thanks!

should maybe factor in the weight of the vessel as well?
26000/kg's

Kettlewell 28-03-2013 12:01

Re: What is your Bigness Factor?
 
Quote:

should maybe factor in the weight of the vessel as well?
26000/kg's
Probably should, but I wanted to keep it really simple so we get lots of responses. The number is not to be taken as a scientific category, but just a relative level.

Dockhead 28-03-2013 12:02

Re: What is your Bigness Factor?
 
Since the displacement of a boat, and the windage of a boat, are not linear functions of length, I think this metric is flawed. Larger boats with average sized anchors will have much greater "Bigness Factors" than smaller boats with average sized anchors.

I would think that if you want a simple metric, it would be much better to divide anchor weight by boat displacement.

ReMetau 28-03-2013 12:06

Re: What is your Bigness Factor?
 
1.8 for me. 33' boat with 60lb Bruce.

Kettlewell 28-03-2013 12:14

Re: What is your Bigness Factor?
 
Quote:

I would think that if you want a simple metric, it would be much better to divide anchor weight by boat displacement.
Virtually every anchor manufacturer has a table relating boat length to anchor size. Some do include displacement, but most have something vague about upsizing one if your boat is heavy.

cfarrar 28-03-2013 12:40

Re: What is your Bigness Factor?
 
1.31 with a Rocna 25 on a 42 ft'er

Panope 28-03-2013 12:46

Re: What is your Bigness Factor?
 
I also believe the metric is flawed. In addition to what was mentioned above, the use of LOA instead of LOD seems problematic (what effect does a bowsprit have on anchor size?). The poll would be more useful if it asked how many sizes up or down on your anchors sizing chart.

I am 1.29. according to this poll.

I am 2 sizes larger on my anchors sizing chart. Should that not constitute BiB?

Steve

Paul L 28-03-2013 12:48

Re: What is your Bigness Factor?
 
Interesting metric. Sounds like people get a little offended when you imply their thing is small. My thing is 1.75


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