math conversion

1/350 scale is 1" on the model is 350" on the real thing so:

1" = 350" or 1" = 29' 2"

likewise in metric

1cm = 350cm, or 1cm = 3.5 meters

The legal definition of an inch in the USA is 1" = 2.54cm (exact) this is the International Inch as defined in 1958.

Before 1958 the USA standard inch (Now called "US Survey Inch") was defined as 1 meter = 39.37" (exact). Before the US Survey Inch @1803 each state had its own definition and there was considerable bickering.

radartec

building  a 1/350 square bridge Fletcher Tincan circa 1965,USS INGERSOLL,DD652.Using the Sullivans kit and scratch building the FRAM conversion parts.I have a set of the builder's dwgs for the 1965 dry dock work and am probably doing too much on the details !!

  Thanks for the reply

Sounds like a great project!  Hope you will post some pics as you go along!

radartec

I have a set of the builder's dwgs

Ah, that's why you want the equals 1'-0" scale.

If the drawings are in 1/n" = 1'-0" scale, multiply the n by 12 to get the 1:y scale ratio.

So, if 1/4" = 1'-0" take and multiply 4 x 12 to get 48, so the scale is 1:48.

So, if 1/8" = 1'-0" take and multiply 8 x 12 to get 96, so the scale is 1:96.

Now, if 3/16" = 1'-0" that's a bit different.  16 x 12 = 192 but you need to divide that by 3 to get 64 to get the 1:64 scale. 

radartec

building  a 1/350 square bridge Fletcher Tincan circa 1965,USS INGERSOLL,DD652.Using the Sullivans kit and scratch building the FRAM conversion parts.I have a set of the builder's dwgs for the 1965 dry dock work and am probably doing too much on the details !!

  Thanks for the reply

I'm thinking you got this in the wrong thread,  expecting it to be in the one dealing with colors & decals for a '60s destroyer.

You got my response on the paints.

In 1:350 scale, high vis shaded hull number decals are available from Gold Medal Models

http://www.goldmm.com/ships/ShipDecl.htm

or from Hawk Graphics

http://www.hawk-graphics.com/pages/decals.html

to name but two sites

building  a 1/350 square bridge Fletcher Tincan circa 1965,USS INGERSOLL,DD652.Using the Sullivans kit and scratch building the FRAM conversion parts.I have a set of the builder's dwgs for the 1965 dry dock work and am probably doing too much on the details !!

  Thanks for the reply

Tucchase, thanks you are right.

Dave

I really think some of the posts in this thread make the process of calculating scale dimensions more complicated and confusing than it needs to be.  It's actually quite simple.  (If it wasn't, I wouldn't be able to do it.)

Life is simpler if you do all your calculating in the same system of units - either imperial or metric.  If, for some reason, you need to convert from one system to the other, make the conversion either before you start the calculations or after you're done.

If you want to find out what a dimension on the real ship would be on 1/350 scale, divide the real dimension by 350.  (I repeat:  a calculator that operates in your chosen system of measurement makes that simple.)  When you get that answer, convert it, if necessary, to the other system of measurement.  (That $9.00 Wal-Mart calculator will do that for you, too.)  

That's all there is to it.  Really. 

djrost_2000

1 scale Ft. in 1/350 scale would be .07257 mm, so just under a mm.

1 Ft./350 * 25.4=.07257   yeah, just under a mm.

~Dave

 

Not to be picky, but in the interest of accuracy, your formula should be 1 ft = 12 in / 350 * 25.4 = 0.8708571429.  You forgot to convert your ft. to in. before multiplying by 25.4.   0.07257 mm is = 1 in / 350.  But you are correct, it is just under a mm.  But it would be inadvisable to use just 1 mm per foot as a guide.  For the above mentioned 800 ft ship your model would be over 103 mm too long.   800 ft * 0.8708571429 mm = 696.69 mm.   800 ft * 1 mm = 800 mm.  It would still be in scale, but it would no longer be 1:350.  It would be 1:304.8

1 scale Ft. in 1/350 scale would be .07257 mm, so just under a mm.

1 Ft./350 * 25.4=.07257   yeah, just under a mm.

~Dave

Here's some conversion figures from "Pocket Ref" by Thomas J. Glover, sold by Micro Mark.

1 Meter=1.0936 Yards

1 Meter= 3.28084 Feet

1 Centimeter= .3937 Inches

1 Millimeter= .03937 Inches

1 Inch= 25.4 Millimeters

1 Inch= 2.54 Centimeters

1 Foot= .3048 Meters

1 Yard= .9144 Meters

I recently downloaded, for free, a calculator that will convert any scale to any other scale.  It will also tell you what scale it will be if you enter a 1:1 size, then your model size.  The result will be the scale that is.  It will also tell you what magnification you need on a copier to convert from one scale to another.  Such as convert plans of a 1:200 ship to 1:350, you would set the copier to 57.14%.

It is called ScaleCalc.  Written by Frank Crenshaw.  It is available from many websites as freeware.

radartec

ok ,I need to get the conversion of 1/350 in inches  !! So what does  1 foot equal in inches ??  Thanks

Well, the ration is right there, 1 of something is equal to 350 of the other.

At 1/350 scale, 1 inch equals 350 inches.  350 inches is (350 / 12) 29'-2" (0.16666 feet - 1.99999" rounds to 2")

So, you are right next to the engineering scale of 1" = 30'-0" since I think that is the answer you are looking for.  You could think of 1/350 as 12/350 = 1'-0" call that 34/100 = 12" which would 'round' to about 1/30" = 12"

1/48 is 1/4" = 1'-0"; 1/96 is 1/8" =  1'-0"; 1/192 is 1/16" = 1'-0"  More "metric" scales similar to that ar 1/50'; 1/100; and 1/200, in case you are in catalogs and trying to sort out which sorts of things scale with ohter things.

Let's see, 54 * 32 is 1728mm 1728/350 is 4.9mm, call that "5mm" in "figure scale" or a 1/4 of 200mm wargaming scale.

Put this another way, 12 miles is 21120 yards which is 60yards (60 1/3) at 1/350; 20,000yds is a typical max range for 5" naval rifles.

Any of that help any?

Bgrigg

jtilley, it doesn't surprise me that your calculator is refusing to work on that number. You're using a calculator designed for woodworking, and even the most anal cabinet maker won't be worried about >3/1000 of an inch!

Radartec, what could you be working on that if forcing you to consider working at that level of detail?

Are you trying to figure out how many scale feet are in 1"? In that case divide 350 by 12 = 29.166666 scale feet.

Actually that old Radio Shack calculator wasn't designed for woodworking.  It was one of the first "yard/foot/inch" calculators on the market, and was promoted as a tool primarily for architects, engineers, and machinists.

Since then quite a few calculators have come on the market that are marketed specifically to woodworkers and do-it-yourselfers.  And for a little while there was one (called "Modelcalc") that was designed specifically for model builders.  As I remember, it cost about $40 or $50; it was only on the market for a couple of years.  I guess the competition from the likes of Inchmate and Sears drove it out.

It's likely that any calculator that reads in inches and fractions of inches will be more than satisfactory for any problem a model builder will encounter.

jtilley, it doesn't surprise me that your calculator is refusing to work on that number. You're using a calculator designed for woodworking, and even the most anal cabinet maker won't be worried about >3/1000 of an inch!

Radartec, what could you be working on that if forcing you to consider working at that level of detail?

Are you trying to figure out how many scale feet are in 1"? In that case divide 350 by 12 = 29.166666 scale feet.

One of the most useful tools a modeler can have on a workbench is an electronic calculator that works in feet, inches, and fractions of inches.  I've got one in front of me that I bought from Radio Shack more than twenty years ago; it still works perfectly.  If I key in 1" and divide by 350, I get 0.0028571".  If I tell the calculator to convert that to a fraction of an inch...well, it refuses to do it.  (This particular calculator only gives answers down to 1/64" - which obviously is far more than 1/350".)

I paid about $35.00 for that calculator.  Nowadays you can pick up one that will do everything mine does and converts between the imperial and metric systems for far less.  Places like Lowe's and Home Depot offer a variety of such gadgets - and a few months ago I found one at Wal-Mart for $9.00.  If your pencil-and-paper math skills are as sloppy as mine, you'll find that a calculator like that will pay for itself in terms of stress reduction in a matter of hours.  Highly recommended.

That looks good until you tried to go metric. 1 scale foot is about .86mm which while small rounding that off you will quickly skew your measurement (you are off by almost 15%).   

Im not quite sure what you are after but the easiest way I've found to convert scale is to divide feet, meters, yards what have you by 350, then multiple that by the appropriate smaller measurement.

So if we take an 800 foot battleship, divide 800 by 350 = 2.286 feet, then to get the size in inches just multiply by 12 = 27.4" You could also skip the middle step and just multiply 800 by 12, then divide by 350. Sometimes the second method is more accurate since you are only rounding your numbers once.

If you prefer metric 242.2 meters / 350 = 0.69 meters, then to get cm multiply by 100 (69cm), to get mm multiply by 1000 (690mm)

Just make sure you always work in the same unit of measure (feet, inches, mm etc) or you will mess yourself up. If you want to work in metric I'd start in metric, if you want to work in english units start with feet or inches.

If you are trying to make something in scale, I'd start with the full size and convert it. YOu can work by the foot in larger scales (1/24 1/2" = 1 foot) but when you get into the smaller scales measuring a foot is difficult and rounding will quickly throw you off.  

Thanks for the reply. I guess what I was looking for is;

in 1/350 scale----1'=350',       so 1" would = 29.2',       so 1 scale foot would be .034",    so 1scale foot would be 1.0mm (1" =25.4mm)

  Does this look right to you ?

   Thanks,

   LEE 

There are 12 inches in 1 foot

If you mean how much 1/350 mm is in inches

1in = 25.4mm

Therefore 1/350mm = 1/14 inches or 0.07142857143

Or

1/350 inches is equal to 2.857142858x10^-3 inches