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 Body dimensions - the 'rule of eighths'

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clive_t

clive_t


Location : Portsmouth, England

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PostSubject: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyMon Nov 10, 2008 2:30 pm

Following on from Patrick's query about making a 1:19 driver from a smaller scale figure, I thought it might be useful to have this - as a separate thread.

The theory is that if the height of the head (from chin to crown) is 1 unit, then overall the normal height of the overall body is 8 units (8 'heads' as it were)

The basic proportions then look like:

From top to bottom, the second eighth is from the chin to the nipples.

The third is from the nipples to the midriff.

The fourth is from the midriff to the groin.

The fifth is from the groin to half way down the thigh

The sixth is from half way down the thigh to the bottom of the kneecap

The seventh is from the bottom of the kneecap to the half way down the shin

The eighth is from half way down the shin to the sole of the foot.

This diagram probably shows it better:

Body dimensions - the 'rule of eighths' Body_proportions_clip2b

So what does this mean in modelling terms?

If we take an average height of, say, 5ft 9ins, then in millimetres that is 1753. Which in turn means that each unit is 219mm. Reduced to a scale of 1:19 this figure becomes 11.5mm, making the overall scale height just over 92mm. Similarly, a 6ft 3in individual would scale out at just over 100mm in 1:19 money. At 5ft 3in, that individual would scale out at a shade over 84mm.

Of course, none of this is exact, and people being people will not wholly conform to this 'rule of eighths' - that's why ergonomics is such a big thing in equipment design. But as a rough rule of thumb it is useful in figure construction.

For further interest, I have developed a simple spreadsheet to show all the various heights for scales 1:19 down to 1:29 for a given figure height in feet/inches. It seems I cannot attach files here, so if we can come up with some other way of making it available then I'll do that.


Last edited by clive_t on Mon Nov 10, 2008 3:24 pm; edited 2 times in total
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Admin
Admin
Admin


Location : France

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyMon Nov 10, 2008 3:00 pm

That's very useful reference Clive, thanks. I printed out for keeps.

Hey but you could have chosen a nice girly figure though.... Embarassed

Ah...and my daughter has just asked me for copy to colour in.... affraid
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pjti




Location : Galizano, nr Santander, Nth Spain

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyMon Nov 10, 2008 3:31 pm

Nice one Clive, I think it might help a lot, but shouldn't he have some pants on ?


The spreadsheet thingy might be useful, could you not save it as a screenshot then post the jpeg ?
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Location : France

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyMon Nov 10, 2008 5:30 pm

You can't upload files on this forum server.

You will need a file hosting service, there are plenty about or I can upload it to my website server which has this facility and it will then be downloadable to all.

Send the file to me by e mail Clive if you want to.
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clive_t

clive_t


Location : Portsmouth, England

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyMon Nov 10, 2008 9:22 pm

You have mail...
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Admin


Location : France

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyMon Nov 10, 2008 10:09 pm

Will do ASAP, Thanks mate.
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Location : France

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyTue Nov 11, 2008 10:44 am

You can now download this useful file from a page on my website.

Download docs page
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clive_t

clive_t


Location : Portsmouth, England

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyTue Nov 11, 2008 11:47 am

Just tried it, works a treat guv thanks!

For the benefit of anyone who does not have M$ Excel, it should work with the MS Works spreadsheet, or if you cannot abide any M$ spreadsheet offering, then OpenOffice.org do a whole suite of office-type software (for free by the way, including a very good spreadsheet program) and the latest version is a very good emulation of M$ office:

http://www.openoffice.org/
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clive_t

clive_t


Location : Portsmouth, England

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PostSubject: Re: Body dimensions - the 'rule of eighths'   Body dimensions - the 'rule of eighths' EmptyFri Nov 21, 2008 11:57 pm

I am thinking of putting this on evil-bay:

Body dimensions - the 'rule of eighths' Figure_height_gauge

Figure height gauge, for making own figures. Compatible with LGB

Rare, pre-enjoyed but as-new

No box, but will be securely packed for delivery

Paypal only

Postage + packing £5

Reserve price at £5

Good luck, and happy bidding!

OK seriously, I deliberately went for a nominal height of 5ft 11ins, as that is 80mm or thereabouts in 1:22.5-speak. Even I with my appalling mathematical skills was able to work out how to graduate this for a 'rule of 8ths'. well, I managed to keep one sock on whilst working it out....
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