A couple years back I asked a similar question to MAM.
The answer I got from Darryl Murphy was
"Hello Charlie
I think the confusion is that the data point (center of axle) is
approximately 1.15" aft of the leading edge. 20% of 60" = 12", 12" - 1.15" =
10.85" A.O.D. (aft of datum).
Hope this helps.
Cheers
Darryl"
As Darryl says
I hope this helps
Charlie E.
----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, February 02, 2011 1:32 AM
Subject: [rebel-builders] Weight and ballance datum
The cg envelope is 12" to 19.7" as stated in the construction manual, but
what are they using as the datum? On the cg calculation page to compute
empty cg the datum is the landing gear leg, but just want to make sure
it's apples to apples, and that the max forward and aft limits are also
referenced to the the gear legs and not the wing leading edge.
Thanks again.
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