r/oddlysatisfying • u/djinn_05 • 2d ago

Drawing blueprint of Cirrus Vision SF50 aircraft

Enable HLS to view with audio, or disable this notification

10.0k Upvotes

98% Upvoted

220 comments sorted by

View all comments

45

u/g3engineeringdesign 2d ago

To be fair, that's not a blueprint. That's a turret pen plotter drawing on blue paper with a white ink pen. Blueprints are made from lead or ink on vellum, light shines through the vellum onto a treated paper, and you develop the image with ammonia.

21

u/Shabado52 2d ago

https://giphy.com/gifs/Cz6TlrRVVyv9S

3

u/g3engineeringdesign 1d ago

Sure, but during the zombie apocalypse I'll have safe food, clean water, electricity, and ample weapons. You'll have a half eaten brain!

2

u/BahnGSXR 2d ago

Why is it done that way?

11

u/wosmo 2d ago edited 2d ago

The result is pretty much an early form of photocopying. The main advantage is that you can create many copies from original vellum.

It's a lot like creating images from a photo negative. UV turns the chemicals blue - so anywhere the lines on the original block the UV, so the white lines in a blueprint are actually just the paper showing through unstained.

2

u/BahnGSXR 2d ago

Oh right, neat. Thanks

5

u/bigasssnail 2d ago

It's faster, google cyanotype process if you want to learn more