Working with plans from CAA? Scale?

IroncladNut · Post by **IroncladNut** » Thu Sep 06, 2007 5:18 pm

Greetings all,

I'm sure I'm not the first person to drool over all of the free plans of French Warships on CAA's website. However, the scale of these plans is driving me nuts.

Each set of plans has an index in a pdf that explains what each page is and the scale, but I don't understand how to read them. Perhaps because im not up to par with the metric system.

Take the destroyer Enseigne Roux for example. The scale of the basic plan is listed at 1/20, but it can't possibly be 1/20th scale. The scale of the next sheet is listed as 0,015, which makes no sense at all....

I want to build in 1/72 scale, in inches...

Any thoughts?

Post by **HMAS** » Thu Sep 06, 2007 7:45 pm

FWIW

From what I can see is that some plans are in a stated scale & others are simply listed as 15mm/metre (about 4.5mm to the foot) ie it shows as 0.015 or similar.
Don't use Babel fish until after you get to the index of drawings, the French names will disappear & be replaced by a useless translation of the original.
I will leave it for people more fluent in French to help with the rest.
Good luck

Laurent · Post by **Laurent** » Fri Sep 07, 2007 2:29 am

Hi Ironcladnut ,

I'm a french speaking guy myself , I'd be pleased to help you if you need to .

About the older metric scales , they didn't at that time speak in 1/100 nor 1/50 , they used instead 15 millimeters for a meter , or centimeters to a meter .

the metric system is really easy to use :

one meter is divided in 100 centimeters and 1 centimeter is divided in 10 millimeters , so 1 meter is also 1000 millimeters ( you also have decimeters , which are tenths of a meter , but this is disused )

when you meet a scale of 1 centimeter ( cm ) to 1 meter --> 1 / 100
10 millimeters to one meter : 1 / 100 either
if you meet 15 millimeters ( mm ) to 1 meter --> 1 / 66
2 centimeters ( or 20 millimeters ) to one meter : 1 / 50

My intentions are to begin shortly with one of the two destroyers "Volta" or "Mogador" at scale 1/100 , this CAA site is indeed an incredible source ...

I just took a look at the site now , it doesn't work at it should do ...

Regards ,

Laurent

IroncladNut · Post by **IroncladNut** » Fri Sep 07, 2007 4:49 pm

Ok,

I think I might be getting this... So when the plan lists 0,015 it means 15mm equal 1 meter, which is 1/66 scale.

But what does 1/20 represent? The plan simply says 1/20? Confusing

It occured to me though, that regardless of whether the ship is in meters or inches, the scale is the same. Since it the scale size of the real ship.

I actually have 3 ships I want to build, and have all of the plans saved on my computer, my hope is to resize them in photoshop, and print them out in sections.

Jefgte · Post by **Jefgte** » Fri Sep 07, 2007 5:23 pm

Typ �Enseigne Roux� (1916-23) 14
787 ts, 850 tk, 1075 tp; 82,6�8,6�2,8/3,0 m; 2 TP Parsons, 4 k Du Temple lub Guyot, 17000 KM, 2 śr, 30 w (30-31); 175 tr, 1400/14, 550/30; 2�100/45 M93, 4�65/45 M02, 4 wt 4502 (.); z. 76-81. 19..: dod. 1�75pl, 10 bg.

-------------------------
1/1 = 82.6mx8.6mx3m

1/100 = 0.82m or 82cm or 820mm
1/100 = 0.086m or 8.6cm or 86mm
1/100 = 0.03m or 3cm or 30mm

---------------------

The number 0.05 is the result of the division 1/20 or 1:20

To have the reduce factor of scale, made 1:0.05 = 20
---------------------

The scale problem is identical with Metric system & Imperial units

20" at 1/20 = 1"
20m at 1/20 = 1m

Jef

IroncladNut · Post by **IroncladNut** » Fri Sep 07, 2007 5:33 pm

Now I'm totally confused...

The drawing can't be in 1/20 scale. The entire drawing, which shows 3 views of the ship, is only 1,55x0,75. Multiplying that by 20 doesn't come close to the actual size of the ship.

I'm totally lost...

Jefgte · Post by **Jefgte** » Fri Sep 07, 2007 6:34 pm

0.05 = 1/20 = 1:20 is an exemple

You can have much scales

0,015 means 15mm for 1 meter, which is 1/66 scale

0.015 = 1/66 = 1:66

Jef

IroncladNut · Post by **IroncladNut** » Mon Sep 10, 2007 5:48 pm

Ok,

The only thing I can think of is that the plans have been resized from what they originally were. The plans themselves list the scale as 1/20, which they can't be now, so they must have been resized before they were put on the website...

Laurent · Post by **Laurent** » Tue Sep 11, 2007 2:48 am

Hi IroncladNut ,

I guess so either ...

Anyway , once they come out of the printer , it is just a matter of measuring the differents datas , as I already told here above , to get the plans at 1/72 , as you wish them ...

Just the same when I get plans at 1/48 and I want them at 1/100 --> I go to the local copy shop and let them resized on their very big plan copying machine

In your case , I'm sure you can put those plans on a USB storage key and go to the copy shop , they should be able to print those plans for you ( I never did it that way , though , I could tell b*llsh*t here ... )

Cheers ,

Laurent

Laurent · Post by **Laurent** » Tue Sep 11, 2007 5:46 am

Hi again ,

I printed this morning the "Mogador - Volta" hull lines plan , it came out of the printer on A4 sized paper , I fitted / scotched all the blades together , it asked for a little "cut'n'fit" operations , but it worked out .

And the good news is : it came out rightly at scale 1/100

My wife will be happy , another project on the stock , sanding dust in the air , smells of paint in the cellar , etc ...

Regards ,

Laurent

Jimmy Conway · Post by **Jimmy Conway** » Tue Nov 06, 2007 11:00 pm

IroncladNut wrote:Greetings all,

I'm sure I'm not the first person to drool over all of the free plans of French Warships on CAA's website. However, the scale of these plans is driving me nuts.

Each set of plans has an index in a pdf that explains what each page is and the scale, but I don't understand how to read them. Perhaps because im not up to par with the metric system.

Take the destroyer Enseigne Roux for example. The scale of the basic plan is listed at 1/20, but it can't possibly be 1/20th scale. The scale of the next sheet is listed as 0,015, which makes no sense at all....

I want to build in 1/72 scale, in inches...

Any thoughts?

Dear IroncladNut: make yourself the following mental process:
1. What are the dimensions of the real ship? What is the overall length?
2. Divide it by 72 ( your scale)��observe the overall length of the ship in this scale��.��let�s consider for example that it is 100 cms��..��.your model will have 100 cms in OL��
3. Print the plans in any size��..take the measure for the OL in this drawing�.. consider it is 50 cms��
4. Now you know that you have to transform 50 cms to 100 cms��enlarging!
5. Make the following calculus: 50 + x% (50)= 100....................... x=100%
6. X is the enlargement factor for the drawing you printed��
7. Go to a copy shop and ask for some Xerox, enlarging the drawing in 100%...............
8. The other measures of this drawing, rescaled, will follow the OL�.of course��.
I think I made it clear�or not? Let me hear about you��hope have helped��
My best regards: Jimmy

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Working with plans from CAA? Scale?

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