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The page is now clear.
It would be a great help if worked examples were given with the different equations in this and other related articles. —Preceding unsigned comment added by 89.168.45.137 ( talk) 17:00, 31 October 2009 (UTC)
I have found conflicting values for the polar moment of inertia of an ellipse:
http://www.eformulae.com/engineering/moment_of_inertia.php
gives a formula which looks similar but is really quite different and yields results that make more sense. Could anyone verify this with an engineering text? 72.1.133.102 ( talk) 19:14, 16 December 2009 (UTC)Brendan
The correct formula for an ellipse is 1/4(pi)ab(a^2 + b^2) —Preceding unsigned comment added by 216.174.137.236 ( talk) 15:49, 28 December 2009 (UTC)
Do we really need a list of products that any mildly competent first year engineering student could replicate? Greglocock ( talk) 04:45, 20 June 2017 (UTC)
2/3 pi Rt^3 ?? This seems wrong to me but it's been here for years. I suspect it's something like pi/2(R^4-r^4 ) For thin walled that simplifies to 2piR^3t. — Preceding unsigned comment added by 172.58.43.174 ( talk) 02:06, 26 August 2022 (UTC)
If you're correcting the 2nd formula, beware that a and b are half what they are in the 1st formula and table so it's not wrong in that way. But it is confusing and should probably be made consistent. People keep correcting it in isolation without making the rest of the section agree with the changes. Xcglxdg5uj ( talk) 19:02, 24 August 2021 (UTC)
![]() | This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
|
The page is now clear.
It would be a great help if worked examples were given with the different equations in this and other related articles. —Preceding unsigned comment added by 89.168.45.137 ( talk) 17:00, 31 October 2009 (UTC)
I have found conflicting values for the polar moment of inertia of an ellipse:
http://www.eformulae.com/engineering/moment_of_inertia.php
gives a formula which looks similar but is really quite different and yields results that make more sense. Could anyone verify this with an engineering text? 72.1.133.102 ( talk) 19:14, 16 December 2009 (UTC)Brendan
The correct formula for an ellipse is 1/4(pi)ab(a^2 + b^2) —Preceding unsigned comment added by 216.174.137.236 ( talk) 15:49, 28 December 2009 (UTC)
Do we really need a list of products that any mildly competent first year engineering student could replicate? Greglocock ( talk) 04:45, 20 June 2017 (UTC)
2/3 pi Rt^3 ?? This seems wrong to me but it's been here for years. I suspect it's something like pi/2(R^4-r^4 ) For thin walled that simplifies to 2piR^3t. — Preceding unsigned comment added by 172.58.43.174 ( talk) 02:06, 26 August 2022 (UTC)
If you're correcting the 2nd formula, beware that a and b are half what they are in the 1st formula and table so it's not wrong in that way. But it is confusing and should probably be made consistent. People keep correcting it in isolation without making the rest of the section agree with the changes. Xcglxdg5uj ( talk) 19:02, 24 August 2021 (UTC)