Quote:
|
Nope. That _is_ the meaning of the term now, even if the meaning isn't proper given the origin of the word. Happens all the time.
|
Agreed.
Quote:
This gives us the condition
R^3 + 2 * L R^2 - L^2 R - L^3 / 3 > 0
|
If you plug this equation into Wolfram Alpha, you can get solutions for R and L given the other number. Examples:
R = 20:
L < 33
L = 50:
R > 30
In other words, if lwcamp did his math right, your O'Neil cylinder isn't going to be stable if it's got a radius of 20 kilometers and a length of 50 kilometers.