33 degrees 15 minutes 16 seconds * 5 - (90 degrees 3 seconds - 57 degrees 11 minutes 44 seconds)

33 degrees 15 minutes 16 seconds * 5 - (90 degrees 3 seconds - 57 degrees 11 minutes 44 seconds)

90 degrees 3 "- 57 degrees 21'44" = 89 degrees 59'63 "- 57 degrees 21'44" = 32 degrees 38'19“
After the multiplication and division, and so on, it depends on whether you seriously use your brain to calculate. Degrees into the number is 60 base, full 60 into 1

Use CAD to draw the lofting of elbow, mark its linear length after setting out, then draw it on the actual iron plate, and cut it with gas cutting. Is that ok
Well, do you use this method to draw other doors, such as the more complicated corner bend, bevel cone, pyramid, etc
Also, is it the same to draw a pyramid with a ray and a triangle
If you want to draw a corner elbow, you need D, R and 90 degrees to know the size

Great. It's more accurate than manual lofting. That's what I did. I can give you a small program for automatic lofting in CAD. I'm using Excel, which is very easy to use

Lofting drawing of 90 degree diameter 500 elbow

Since you are lofting, there are still several data to be found
1. Turning radius of elbow
2. Wall thickness of elbow
3. Inner groove or outer groove

I need a 90 degree bend with a diameter of 529 to make a lofting drawing. It's better to explain it in detail

The data are not given in detail. The bending radius is 1.5 times (i.e. 750mm), the number of segments is 5, and the circumference is divided into 12 parts
I'm so dizzy. It took two hours to send pictures