Find a CG on a plane

[Niggo]

Hello! I had builded a plane but i have some problem finding his CG, any tips on detect it before try to make it flight? It's a me 163 komet, just for let you know what type of plane i am working on. Thanx

[Ollie]

The general requirement for pitch stability is that the Center of Gravity be located ahead of the Neutral Point. The neutral point is the aerodynamic center of the whole aircraft. For a plane like the ME163, which has no horizontal tail surfaces, the neutral point is very near the aerodynamic center of the wing. To find the aerodynamic center of the wing (near 25% of the mean aerodynamic chord) the area inside the fuselage must be included by extending the leading and trailing edges all the way to the center line. To get a safe CG to begin flight testing with enough stability, the CG should be located at about 18% of the mean aerodynamic chord from the leading edge. To find the mean aerodynamic chord see:
http://perso.wanadoo.fr/scherrer/matthieu/english/mce.html