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The differential equation in the section Damped pendulum is incorrect. It is the equation of an ordinary gravity pendulum (Mathieu's equation), not a torsion pendulum. The nonlinear term only applies to the gravity pendulum, nor should the acceleration of gravity or length appear. The correct equation is:
--Chetvorno 19:41, 16 July 2007 (UTC)
- Completely rewrote Damped pendulum and Oscillatory motion of torsion pendulums sections to correct this error and present more useful information. --Chetvorno 19:10, 12 August 2007 (UTC)
I think the term torsion catapult clock in the 2nd paragraph is not used. I googled the term and didn't find a single reference to it. I think torsion pendulum clock is the term you want. --Chetvorno 20:18, 16 July 2007 (UTC)
Is the tortion spring this one? http://www.sterlingspring.com/images/torsion/torsion_spring1.jpg
- Yes, those are torsion springs. That would be a great picture to add to the article. Can you get permission to use it? --Chetvorno 23:59, 29 July 2007 (UTC)
Use in firearms
Best I can tell, the springs inside most firearms to add resistance to the trigger are torsion springs. Can anybody confirm this? Is it worth adding to the article under Uses? --Asriel (talk) 19:46, 2 April 2008 (UTC)
Error in torsional harmonic oscillators
An IP noted that "there is a mathematical error in at least one of" the equations in this section. I pulled out my vibrations book and found the equation but it's laid out completely different. Moreover, it's been a long time since I've dealt with vibrations, and it isn't coming back quickly. If anyone else has a better source or knowledge it would be appreciated. Wizard191 (talk) 22:35, 16 April 2009 (UTC)
If the first equation
has correct units, then the units of must be because the units of Torque are (so that ) and has no units. The equation for the energy then is wrong, because it also gives the units , again because or has no units. Have in mind that Joules are —Preceding unsigned comment added by Kakila (talk • contribs) 19:28, 30 April 2009 (UTC)
- I believe you used the wrong units for torque. Torque is defined as: . So the units of torque are , the same as the units of energy . With this correction, the units in the equations mentioned work out correctly. --ChetvornoTALK 20:39, 30 April 2009 (UTC)
Yes, you are right. A moment of confusion, I guess. Thx
The torque is defined as
Classical torsion springs don't seem to fit into either of the 'two types' listed.
- As in a mangonel, you mean, where an arm throws a missile powered by a torsion spring consisting of twisted fibers (ropes)? A similar example is those toy airplanes with propellers powered by a twisted rubber band. I think that would come under the heading of a "torsion fiber". --ChetvornoTALK 20:11, 27 April 2012 (UTC)
Wrong Link to French Site
The current link to the French language site points to an article about a Torsion Balance. The correct article can be found at this URL: http://fr.wikipedia.org/wiki/Ressort_de_torsion - but I am not smart enough to figure out how to change the link.