Datum

Definitions

• (reference datum) An imaginary vertical plane or line from which all measurements of moment arm are taken. The datum is established by the manufacturer. Once the datum has been selected, all moment arms and the location of CG range are measured from this point.
• An imaginary vertical plane or line from which all measurements of arms are taken. The datum is established by the manufacturer. Once the datum has been selected, all moment arms and the location of CG range are measured from this point.
• An imaginary vertical plane or line from which all measurements of moment arm are taken. The datum is established by the manufacturer.

References

• Airplane Flying Handbook, Federal Aviation Administration, 2021
• Powered Parachute Flying Handbook, Federal Aviation Administration, 2007
• Weight and Balance Handbook, Federal Aviation Administration, 2016
• Weight-Shift Control Aircraft Flying Handbook, Federal Aviation Administration, 2008