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[rebel-builders] Weight and ballance datum

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Charlie Eubanks

[rebel-builders] Weight and ballance datum

Post by Charlie Eubanks » Sun Feb 19, 2012 8:35 pm

Jesse

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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Jesse Jenks

[rebel-builders] Weight and ballance datum

Post by Jesse Jenks » Sun Feb 19, 2012 8:35 pm

Thanks a lot for sharing that Charlie. It's very illuminating, and frustrating that once again it's not always smart to trust what's in the manual. I think I have it figured out now though
Jesse
From: charlie@troyairpark.com
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Weight and ballance datum
Date: Thu, 3 Feb 2011 19:33:02 -0600

Jesse

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.




-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------






-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
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List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------






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