1/72 Hellcat plans

[Procopius]

Heyo, does anyone know offhand what level of magnification I would need to use on the Eduard Hellcat I plans to be able to produce photocopies I could cut up to use for templates? Failing that, is there a 1/72 plan of the Hellcat showing the RN camouflage pattern?

[Ed Russell]

It looks like you have 1/48 plans you wish to make into 1/72....... From 1/48 to 1/72: reduce to 66.7%

Alternatively -

http://www.ipmsstockholm.org/magazine/2003...ng_drawings.htm

[Procopius]

I think I explained myself badly - I'm alarmingly inarticulate. I have instructions (and the kit) for the 1/72 scale Eduard Hellcat I and II profipack. I wanted to know what increase in size I'd need to set the photocopier for for the drawings in the instructions to be 1/72.

[Ed Russell]

Indeed you are.... (:>)

Measure the relative size of the unknown drawing compared to a 1/72 drawing - just say the wingspan is 1.425 inches on your diagram - substitute what ever span your plan is for 1.425 - and calculate the ratio compared to the wingspan of your 1/72 kit, about 7.125 inches. The ratio of 7.125 / 1.425 = 5. So this putative drawing needs to be enlarged by 500%. Now measure your span and calculate your own ratio.

Edited May 15, 2012 by Ed Russell

[MDriskill]

Here is Mr. Russell's method, in terms even us Yanks (who rank 30th in the world in school math scores or some such) can understand and remember! Note, even for someone as dumb as me...doing this in metrics makes it much easier (we need the same dimensional units on both sides of our tiny equation, which is of course just a matter of moving the decimal point).

1. Find the real-life dimension in question. Per Wikipedia, the Hellcat's wingspan is 13.06 meters, or 13,060 millimeters.

2. Divide that number by the scale you are working in. The Hellcat's wingspan in 1/72 is thus: 13,060 / 72 = 181.4 mm. I call this number, "what you Want" (W).

3. Measure the drawing you are trying to convert. I don't own the Eduard kit, but for the sake of argument let's say the kit plan's wingspan is 130 mm. This number is "what you've Got" (G).

4. Now, divide what you Want, by what you've Got: (W/G).

5. If the number comes out greater than 1, enlarge the drawing. If less than 1, reduce it. To finish our lame example: 181.4 / 130 = 1.395. ENLARGE THE DRAWING TO 139.5 PERCENT OF ITS ORIGINAL SIZE.

6. One last note...in the real world, copy machines are seldom perfect. So measure the the drawing you end up with, and if it's off a bit, enlarge or reduce again by a slightly different amount as needed.

Edited May 20, 2012 by MDriskill