About this Plan
Medea. Radio control powered glider model. Wingspan 3230 mm.
Direct submission to Outerzone.
Update 02/12/2019: Added article (in German), includes materials list.
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User commentsSame problem as with many other FMT plans: plan is reduced 1/3. This scan is from a pull-out plan, not the full size. This plan gives about 2304mm span (91in).
KLH - 02/12/2019
The plan states the wingspan is 3,230mm, or close to 127.2" . Using the Measure tool in Adobe Reader the half-wing depicted in the plan gives 1122mm, so 2244mm for the full wingspan. If I were to use this on a large format printer I would use a scale factor of 144% (=2244/3230) and would end up with a plan printed to the right size bar some small round ups and downs in the figures calculated above.
Miguel - 02/12/2019
Miguel:you forgot the fuselage with of 56mm
KLH - 03/12/2019
So I did! Hey, what's 56mm between friends, eh? :-)
In any case the division above was inverted which is a bigger error. So with the correct figures it becomes 140% (=3230/2300).
And what's that Chinese stamp doing in the fuselage sheet at the top left corner?
Miguel - 03/12/2019
141 percent is the factor of enlargement from one DIN A paper size to the next larger one, 70 percent is the factor by which to reduce a document from a larger to a smaller scale. Funny enough, smaller DIN numbers mean larger scales. More about it on Wikipedia, search for "paper size".
This means the good folks from FMT just used the next smaller paper size to get their plans into their magazines.
Martin - 18/11/2023
The mystery of the Chinese rubber stamp has remained unsolved for four years.
Martin, the beauty of these 'A' series paper sizes is that they were designed to, if you start with one page in one size, if you cut it in half on the long size, you will get two pages of the lower number. Or, conversely, if you tape two pages butted together along the long side, you get one sheet of the number above.
The side length ratio in any of these paper sheets remains constant throughout this range, the ratio being the square root of 2 or 1.41421... etc.
As the standard (int. ISO 216 or old German DIN 476) defines the starting point (A0) as having an area of 1 sq.m., then using the SQRT(2) sheet side ratio above, A0 sheet sides will be 1189mm and 841mm.
Cut the A0 sheet in half exactly and you get two A1 sheets, each 841 (seen this before?) x 594 (ca. half of 1189), all in mm.
Start with an A4, stick two together and get an A3. Or fold it in half and you'll have a (double sheet) A5.
Nothing on that rubber stamp yet?
Miguel - 20/11/2023
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