proppastie
Well-Known Member
This is real...Background: Phil in Ireland is building a Carbon Dragon and testing his spar had a failure.
http://www.ihpa.ie/carbon-dragon/in...ress-on-phil-lardner-s-all-carbon-cd?start=60
He has decided to splice the center with Aluminum. This splice is similar to what I am doing with my Aluminum Dragon.
Now comes the question.:
When doing the stress analysis of a wing all the references show the moments for 1/2 the wing.
Is it possible the moment at the exact center is twice that.
Shown below is my "lineal FEA" (Grape)
The load on the wing is represented by 1919# at centroid of 110" shown is the whole wing.
The reaction at node 8 is 3838 (2x 1919) ....so the moment is 422180 in-lb at the exact center?
http://www.ihpa.ie/carbon-dragon/in...ress-on-phil-lardner-s-all-carbon-cd?start=60
He has decided to splice the center with Aluminum. This splice is similar to what I am doing with my Aluminum Dragon.
Now comes the question.:
When doing the stress analysis of a wing all the references show the moments for 1/2 the wing.
Is it possible the moment at the exact center is twice that.
Shown below is my "lineal FEA" (Grape)
The load on the wing is represented by 1919# at centroid of 110" shown is the whole wing.
The reaction at node 8 is 3838 (2x 1919) ....so the moment is 422180 in-lb at the exact center?