Re: Calculations of spar pins
Posted: Thu Jul 09, 2015 3:11 pm
Sorry I lost a post - not sure what happen
My comment about the distance between the bolt and pin had to do with a previous analysis post.
I adjusted for the vertical shear and the moment through the vector summation that I did. This takes into account the vertical force (shear) and the horizontal force (moment) and combines them into one resulting force.
The vertical distance between the bolt and pin is the primary geometric condition. In engineering this is call a couple. Think of it this way if the vertical distance was doubled I think it is easy to see that the forces on the pin and bolt are less. Likewise, if you just moved the pin say 2 feet in towards the fuselage the forces on the pin and bolt would for all purposes would not change.
I hope this makes it clearer.
My comment about the distance between the bolt and pin had to do with a previous analysis post.
I adjusted for the vertical shear and the moment through the vector summation that I did. This takes into account the vertical force (shear) and the horizontal force (moment) and combines them into one resulting force.
The vertical distance between the bolt and pin is the primary geometric condition. In engineering this is call a couple. Think of it this way if the vertical distance was doubled I think it is easy to see that the forces on the pin and bolt are less. Likewise, if you just moved the pin say 2 feet in towards the fuselage the forces on the pin and bolt would for all purposes would not change.
I hope this makes it clearer.