Aircraft C of G
Whilst reconciling the W & B/C of G of an aircraft,the Cof G Range is determined from a particular Datum point,in this case the wing LE,and expressed as `X`-Y`ins,Aft of Datum. Further investigation for similar models use a different datum point,ie propeller hub,and a further Weighing diagram for similar models expresses the Cof G range as betweem x-y % of Mean Aerodynamic Chord. Now, if all the points for Datums/ref. points are plotted together,we end up with different starting points,and different ranges,overlapping,but also extending the total range of Cof Gs. The Type Cert.Data Sheet gives only one Datum and Range.
So, my question is ,is there an argument for using the MAC range for Cof G,rather than just the other simple datum given in the TCDS. ?
The a/c is a tandem tailwheel trainer..