Terrain scale question for 20/28mm models

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bvera
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Terrain scale question for 20/28mm models

Post by bvera » Sat Oct 28, 2017 6:01 pm

Again checking that I have it right as with the British OOB in the previous topic
This time is a terrain scale question

For 15mm we know 1mm = 1 meter => 1 cm = 10 meters
As for 20/28 models we use inches, usually this means up-scaling by a factor of 1.5x in centimeters (so 15cm distance for a 15mm model is equivalent to 9 inches or 22.5cm for a 20/28mm model).
Thus 1 cm = 15 meters for 20/28mm models

Typical table is 6x 4 feet = 180 x 120 cm
Therefore this represents a surface of 2,700 x 1,800 meters (2,7 x 1,8 km)
Am I right?
Thanks
Benito
...and visit my blog! http://mylardiesgames.blogspot.com.es/

Archdukek
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Re: Terrain scale question for 20/28mm models

Post by Archdukek » Sat Oct 28, 2017 6:45 pm

Hi Benito,
No I don't think that is correct, but I could be wrong.

In 15mm scale 15cm equates to 150m on the battlefield. In 28mm that same 150m distance equates to 22.5cm (9"). So for 28mm models 1cm = 6.66m. It's the inverse of your calculation.
So in 28mm a 180cm X 120cm table equals 1.2km by 0.8km.

Personally for 20mm figures I would use the 15mm distances, but it does depend a little what frontage you have them based on.

John

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bvera
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Re: Terrain scale question for 20/28mm models

Post by bvera » Sun Oct 29, 2017 3:39 pm

Got it
So for 28mm you need 33% more table space to represent the same battlefield
Benito
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Archdukek
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Re: Terrain scale question for 20/28mm models

Post by Archdukek » Sun Oct 29, 2017 8:43 pm

Nope it's 50% more, a 9'x6' (2.7m X 1.8m) is equivalent to a 6'x4' when using 28mm. For these rules depth is good!

John

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bvera
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Re: Terrain scale question for 20/28mm models

Post by bvera » Sun Oct 29, 2017 10:55 pm

Need to review my maths because I’m getting lost
Benito
...and visit my blog! http://mylardiesgames.blogspot.com.es/

Archdukek
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Re: Terrain scale question for 20/28mm models

Post by Archdukek » Sun Oct 29, 2017 11:22 pm

At 15mm scale 1cm = 10m, so a table 180cm X 120cm is equali to 1.8km X 1.2km.

At 28mm scale 1cm = 6.66m, so a 1.8km X 1.2km battlefield needs a table 270cm X 180cm (9'x6')

The 28mm groundscale is ⅔rd that of 15mm, so you need a table that is 3/2 times larger to match.
⅔ X 3/2 =1! :-)

John

Contrarius
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Re: Terrain scale question for 20/28mm models

Post by Contrarius » Thu Jun 14, 2018 8:21 am

So, what do most folk use for 1/72 scale figures - the measurements for 28mm or 15mm, or something in between?

Most of my figures are the old Airfix H0/00 scale (equivalent to 22/24mm depending on the pack) with a mix of newer Italeri and HaT plastics plus some 25mm Minifigs. I also have a few Hinchcliffe 25/28mm giants mainly as command figures.

In truth I find it a little odd (no sorry, the correct word is "absurd") that this is not mentioned anywhere in the rules. OK, so I've been out of the stream for several years.... ahem, decades.... but 1/72 is still a major scale, and where I live no one, literally no one, uses 15mm or 28mm for Napoleonics.

Archdukek
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Re: Terrain scale question for 20/28mm models

Post by Archdukek » Thu Jun 14, 2018 9:19 am

Model height isn't really relevant, it's the base size and number of bases in the battalion that will determine the unit frontage and therefore the groundscale which should work best for you. How big are your bases compared to those recommended for 15mm or 28mm?

Personally I use 40x40mm bases with 4 28mm figures on each in 2 ranks, normally 6 bases to a standard battalion which has a frontage in line therefore of 240mm. However, that means that I prefer to play on a 9' X 5' or 6' table when I can.

John

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Re: Terrain scale question for 20/28mm models

Post by Contrarius » Thu Jun 14, 2018 1:43 pm

My largest available table is 7'x4' so I suspect that of itself relegates me to using the 15mm ground scale?

My figures are on the old WRG standard 'element' bases of 60mm, with 15mm per infantryman and 20mm per cavalryman, so 4 inf and 3 cav per base. I'm remounting the arty on 50mm bases, as the old 40mm ones look far too cramped, especially when you bear in mind that historically guns were deployed about 10 yards apart.

I'm currently in the process of bring my battalions up to a minimum of 16 men + officers, colour bearers, musicians etc, which allows them to also be used for Sharp Practice. Ultimately, my goal is for units in the 24-32 figure range, as they look so much better than the old WRG midget battalions of 10-14 men including skirmishers. I guess this should allow removal of 12 physical figures before a unit gets dispersed.

Archdukek
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Re: Terrain scale question for 20/28mm models

Post by Archdukek » Thu Jun 14, 2018 3:29 pm

Yes sounds like the 15mm groundscale should work for you. Command figures aside, merging two of your existing units to create a rear rank from which to remove casualties should also work if you don't want to use casualty markers.

John

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