Hi was wondering if anyone could help?(adsbygoogle = window.adsbygoogle || []).push({});

i am after the method of calculating the second moment of area of a aerofoil shape of which I have all the cordinates. It has a consant thickness of 1mm and lookig for values for

1)I_xx

2)I_yy

3)I_xy

the equation for the half the erofoil section is

y=2.391x^5 + 6.784x^4 +7.193x^3-3.647x^2+0.839x+0.011

3. The attempt at a solution

now i know that I_xx =integral y^2 DA

and DA= 1/COS(THETA), HOWEVER CAN BE APPROXED TO 1 HENCE DA=1.dy

after that im stuck : (

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Ssecond moment of area for a aerofoil.

**Physics Forums | Science Articles, Homework Help, Discussion**