Aviation Top 100 questionshttp://www.aircraftbargains.com/cs/forums/21/ShowForum.aspxQuestions about the Aviation Top 100 list.en-USCommunityServer 2.0 (Build: 60526.2668)Re:factors affecting Vmchttp://www.aircraftbargains.com/cs/forums/thread/1751.aspxMon, 15 Jul 2002 20:22:00 GMTa23efcf1-9e75-4ff9-be18-cd9cb68b9485:1751Anonymous0http://www.aircraftbargains.com/cs/forums/thread/1751.aspxhttp://www.aircraftbargains.com/cs/forums/commentrss.aspx?SectionID=21&PostID=1751*** Posted by Robert *** <br />Hi, <br />A great resource for theory on line is the "see how it flies" site, the address I see when viewing it is <br />www.monmouth.com/~jsd/how/htm/how.html#contents <br /> <br /> As I understand it, as cg shifts rearward, the moment of the rudder is reduced, reducing the force available at a given speed. If you want to maintain a specified force provided by the rudder, the airflow past it must increase. For a constant speed, the force will diminish as the cg moves rear, increase as the cg shifts forward. <br /> For an example, consider; <br />Airflow is the working medium of the rudder, and cg affects the needed rudder power. Aircraft speed will equal available rudder power, higher speed means more rudder power. <br /> Think of trying to lever a boulder out of the garden, with a short stick you need lots of power, and if you have a longer stick, the power needed is reduced. The "moment" of the rudder is the length of the stick, and vmc corresponds to the power. Rear cg equals a short stick, so more power is needed, meaning a higher airspeed. <br />Probably a poor explaination, but the "see how it flies " site will do much better. Hope this helps. <br /> <br /> <br />[I'm curious to know what factors affect Vmc and how they do. I know that C of G affects Vmc but I'm not clear on how. If anyone knows or has a web address where I can get this information please let me know.]factors affecting Vmchttp://www.aircraftbargains.com/cs/forums/thread/1742.aspxWed, 03 Jul 2002 22:54:00 GMTa23efcf1-9e75-4ff9-be18-cd9cb68b9485:1742Anonymous0http://www.aircraftbargains.com/cs/forums/thread/1742.aspxhttp://www.aircraftbargains.com/cs/forums/commentrss.aspx?SectionID=21&PostID=1742*** Posted by Brent Hill *** <br />I'm curious to know what factors affect Vmc and how they do. I know that C of G affects Vmc but I'm not clear on how. If anyone knows or has a web address where I can get this information please let me know.