ANM/ kg vs C of G
Thread Starter
Joined: Oct 2005
Posts: 8
Likes: 0
From: Canada
ANM/ kg vs C of G
Hello, can someone help?
I was told C of G does not affect ANM/ kg ...
ANM/kg looks similair to SAR.. or TAS/ FF
Would not a rear C of G = less induced drag = increased ANM / kg?
thanks
I was told C of G does not affect ANM/ kg ...
ANM/kg looks similair to SAR.. or TAS/ FF
Would not a rear C of G = less induced drag = increased ANM / kg?
thanks
Joined: Dec 2005
Posts: 1,694
Likes: 15
From: Wellington,NZ
I've been told, and it makes sense, that rear CG makes a difference due less tailplane drag. Got the chance to try it in a PA28 (which has a rather forward CG anyway. 2 on board, trimmed, I climbed down the back. Pilot re-trimmed, aircraft gained about 8kt.
Understand that airlines plan for long-range flights to be at or near aft limit on landing for this reason.
Understand that airlines plan for long-range flights to be at or near aft limit on landing for this reason.
Joined: Sep 2002
Posts: 2,188
Likes: 6
From: La Belle Province
Just checked the flight planning manual for one of our aircraft and there is a 0.3% penalty or benefit per 1% cg shift depending on direction of shift - with aft cg giving better fuel burn, exactly as reasoned above.
