1st Angle versus 3rd Angle projection

My dad was educated in Germany and learned 1st angle there. He was glad to leave it behind, as 3rd angle was more intuitive.

We should look at these from a 5th angle.

Maybe if we just looked at both of them from a different angle?

Interesting idea…A compromise…Something like mixed units?..I suggest meters and inches:
1m-8"
That way everything works for all people…Problem solved…

To take this a step further and apply it to the OP topic, we could compromise on that, too. How about all top and bottom views should be 1st angle and all side views could be 3rd angle?
Anyone have any other problems I can solve today?

How is that a compromise…that’s what imperial already does 1ft-8". The compromise would be to do away with inches, feet, yards, miles and express everything in a decimal of some new unit…minches maybe.

Compromise.
12+10 = 22
22 / 2 = 11
We use 1cm = 11mm, 1m = 121mm

Let’s see how long it take to land on moon again.

I am someone who loves conspiracy theories.
And I still don’t believe people go to the moon.
USA, which has bases all over the world, would definitely have a military base if it went to the moon. Launching a ballistic missile from the moon would be less costly and more successful. ** :smiling_imp:
This is Putin’s dream, to install ballistic missiles on satellites. ;;

I think Elon is working on that.
To fire missile from the moon, you need to put missile on the moon first.
Guess why Elon is working on landing rockets?
Really just to reuse them?

I should work for conspiracy websites.
Imagine all the stories I can create.

Are you sure about that? First you have to get the missiles up there, and get the materials to build the base up there, and get the base built.

Hmmm… if we can’t even keep our nuclear secrets, how could we keep a less consequential conspiracy secret? ()

Not only that, but the Soviets would definitely have discovered it was a conspiracy, and believe me, they would have told the world. They would never have kept such useful evidence out of the public eye…

EDIT: See, this discussion inevitably runs off the rails. ;;

I would readily give up the inch system in preference for metric. Going through engineering school in inch units is a nightmare beyond description. Doing HVAC calculations in stones and figuring out when ounces is a weight or volume measurement, or all the nonsense around cups, teaspoons, quarts and hogsheads… We also used metric, and that part of it was so much easier.

But I’ll never give up 3rd angle projection for 1st. That’s just silly.

If you don’t believe it, ask RickB . Rick’s company won the moon base tender. I could not remember the name of the company right now.

I must have confused the subject too much, I’m sorry. It doesn’t matter which one makes sense to me, the steering wheel is on the right or on the left, the way you get used to it is the easy one. we are using the 1st angle in Turkey. Also, in the drawings we made for Germany, the 1st angle and metric system. 3rd angle and metric system in our drawings for England. We use 3rd angle and inch in the drawings we made for America.

I think we can all agree… regardless of which system… always always ALWAYS have the “projection cone” symbol on your title block.
image.png
image.png

You can get used to anything, hell I used and was proficient with Catia V4.

All things being equal, it comes down to what you learn or its just random and neither is better than the other. Am arguing that 1st and 3rd are not equal. 3rd is better because view location makes more sense, focused on the position to how you would look at the part. 1st angle was based on Monge’s descriptive geometry and is based more on a mathematical/projection philosophy. 3rd angle was preferred in the US to train people on and was considered easier to teach and understand.

So 1st is based on projection and 3rd is based on viewing the part in person. Which makes more logical sense to our primitive tribal minds?

Thanks for the pic, I’ll use it on my drawings going forward.
image.png

The most important part is knowing which type of views you have. I find an iso view can help me notice that more quickly.

One of the most expensive mistakes in our company’s history was because the engineers didn’t realize that a component drawing was in 1st angle. It resulted in the pads for a ball grid array (BGA) chip being mirrored from where they were supposed to be. It wasn’t something that could be “blue wired” as a rework. We have a heightened sense of awareness about that now.

So, in other words, never use 1st angle projection…ever…it could cost your company a lot of money…

Why isn’t this in the default SW title block already?