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Someone on /diy/ suggested I ask people on /po/ about this so I hope you can help me.
I need to make these two different engine sizes for a star destroyer model I'm making out of steel. To get the size of the steel plate right, I'm drawing it on paper first and then cutting it out and folding the paper into that shape. But it doesn't match the right sizes.
Small engines:
Small diameter: 24mm
Large diameter: 36mm
Height: 21mm
Large engines:
Small diameter: 44mm
Large diameter: 72mm
Height: 53mm
If I just draw a circle of 24mm and 36mm then the height won't match. If I draw a 24mm circle and then another circle 21mm larger (height) and fold it to the large diameter size then the smaller diameter becomes too small.
How do you calculate the correct sizes to draw this out on a flat piece of paper?
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>>555218
This attached image should help you (from wikimedia).
The picture on the right is what you want in the end.
But first, use the one on the left.
Draw the bottom trapezoid (with the r and R values, i.e., 12mm and 18mm, and your height of 21mm).
Then, you should be able to calculate a' and a with basic trigonometry (or just a to-scale drawing).
After you got the values, use it on the picture on the right to get what you need (you might want to add a flap to be able to paste the cone closed).
Hope it helps!
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>>555218
So, any news?
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>>555274
Why do you expect a following to an answer?
That's 4chan, they ask, and if they get what they want, they won't thank and will ask again later...
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