Zxy er Nul for Kroppen, for Hoved og Fod findes det ved Formlen for Parallelflytning af Axerne.
Af Lign. (6) faas:
tg 2 γ = 2 ⋅ 353 209 − 1043 = − 0 , 846. {\displaystyle \operatorname {tg} 2\gamma ={\frac {2\cdot 353}{209-1043}}=-0,846.}
− 2 γ = n . π + 40 ∘ 14 ′ {\displaystyle -2\gamma =n.\pi +40^{\circ }14'} .
γ = { − 20 ∘ 7 ′ , − 110 ∘ 7 ′ . {\displaystyle \gamma =\left\{{\begin{array}{lcl}-20^{\circ }7',\\-110^{\circ }7'.\end{array}}\right.}
Da Zxy er positiv, skal tages: γ = − 20 ∘ 7 ′ {\displaystyle \gamma =-20^{\circ }7'} , hvorved tg γ = − 0 , 366 {\displaystyle \operatorname {tg} \gamma =-0,366} .
Af Lign. (7) findes nu:
I 1 = 1043 + 353 ⋅ 0 , 366 = 1172 c m 4 {\displaystyle I_{1}=1043+353\cdot 0,366=1172cm^{4}} .
I 2 = 209 − 353 ⋅ 0 , 366 = 80 c m 4 {\displaystyle I_{2}=209-353\cdot 0,366=80cm^{4}} .
Hovedaxernes Stilling er vist i Fig. 38.
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