Golden ratio - Irrational Mathematical Constant

[FAST FRED]

Simple rule,

Going faster costs more than going slow!

[Frog4]

Originally Posted by daiquiri

The data in my spreadsheet come from existing ships from 4 actual navies and they clearly show that the "rule" and the following claim

"We observed, that on Navy Ships the General Dimensions (Monohull-SemiDisp/Displ - round bilge) appears a strong relation between LOA and Beam that based in a function (etc...)"

has no basis in the real world, where physics and SORs (and not mystic ratios and formulas) are what determine the shape of a ship.
If it's the form of my reply, and not the substance, that bothered you, then I'm sorry it has bothered you. Sometimes a person feels a need to double-underline his disapproval of unbacked and misleading claims.

I understand your data ... and you backed it up with sources ... I was referring to Alder's data ... and the "form of your reply" kinda knee jerk response ... all is well ... hoping Alder chimes in with the source(s) used for his graph

[Frog4]

Originally Posted by FAST FRED

Simple rule,

Going faster costs more than going slow!

unless you're being chased by a LION

[rwatson]

Originally Posted by Frog4

I understand your data ... ... and the "form of your reply" kinda knee jerk response ... all is well ... hoping Alder chimes in with the source(s) used for his graph

I would hesitate to call Daiquiri's response as a "knee jerk"

I personally appreciate his fast, fact based analysis in an effort to repudiate the kind of irrational assertations that plague the public forum of the web in general, and occasionally in this site.

Both Daiquiri and I spotted the 'bogus theorem', based on experience within this forum over the years. We will never see Alders data. It was pushing a philosophical barrow not based on fact.

[rwatson]

Originally Posted by FAST FRED

Simple rule,

Going faster costs more than going slow!

I wonder if that is always the case. Take a Hydrofoil Ferry that chews up juice at normal speed, but can deliver twice the passengers (doubling its income) in the same time when going fast enough to 'foil' ?

Or even more basic - why are nearly all commercial ships fuel burning and not sail ?

[water addict]

Originally Posted by Adler

Dear All,

We observed, that on Navy Ships the General Dimensions (Monohull-SemiDisp/Displ - round bilge)
appears a strong relation between LOA and Beam that based in a function (regression 0.97)
where the constant ϕ is involved:

LOA= (B^F) /ϕ where F=ϕ^ϕ and for ϕ=1,61803398874989
then F= 2.17845756793758.

The matter comes from dreadnought type to nowadays.
We have to note that as Frog4 put the subject on the table.

Nope.
Numbers don't work out, sorry.

[Northman]

Originally Posted by daiquiri

Total and complete nonsense. Looks like you didn't even bother to check your theories against data of existing ships.

Here is a capture of a spreadsheet with LOA and B data of several ship classes from various navies around the world, together with a graph where these data are shown as points. In the same graph there is a line given by your mystic formula. Now you tell me what relationship can you see between that line and the data from real ships?

Attachment 62868


Your attachment lacks the connection with the real world - see the above graph.

Great post! Thanks to Daiquiri for being alert as well as for clear language backed up by documented facts!
Walter