Weight & Balance (MAC) [Archive]

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UFO999

24th Sep 2006, 18:41

Hi,
A friend has just come back from an interview for a first officer position on a Challenger CRJ, and they gave him a weight and balance on the aircraft, but could not do it as he could not work out the MAC. What is the MAC? I am a CPL/IR with 450 hours and never come across this, any one can help? And am next for the interview with this airline on the CRJ.

Rude Boy

24th Sep 2006, 21:54

MAC, if I'm not mistaken is Mean Aerodynamic Chord, usually expressed as a percentage behind a datum such as the leading edge. Used as an alternative to C of G arm as expressed in light aircraft, you will find the centre of gravity falls in a defined range of the MAC.

DC-8

25th Sep 2006, 20:50

Hi!

Here you have a little bit more about the MAC and its use in practice:
http://www.pprune.org/forums/showthread.php?t=239655