Airplane Update #16

Hi everyone, today I wanted to post the progress I've made with designing the internal structure of the airplane. So far, I've completed creating this for the wings, as seen in the following pictures:

Some changes I made in this model from the paper blueprints I posted last time include modifying the wing skin thickness to be 1.5mm instead of 1mm, and changing the shape of the spar/rib holes from that of a cylinder to an elongated rectangular prism so as to prevent any sort of twisting to occur when inserting the rod into place. Everything else (including the male-female connections, whose outline can be seen in the fourth image) was kept the same.

Next, to get a sense of the size and weight of the wing, I cut the above object into a separate, smaller profile (1/5 of the original wing length) and printed it out. Here is the CATIA model:

And the physical object:

The structure itself is pretty solid, and seems to be capable of surviving a couple crashes (something I was slightly worried about). However, it is quite heavy (36 grams), and there are some inconsistencies in the rib's printing (uneven leveling and a small kink on its side) which could have arisen due to imperfections in the printer itself and the material's tendency to shrink a bit after cooling off. The leading edge of the wing is also a bit rough and discontinuous, which can be seen in the fourth photo as some sort of plating extending to the front to form the curve. In the next couple days I'll try and fix a few of these issues by halving the wing skin and rib thickness (to 0.75mm and 1.5mm, respectively). Hopefully this will reduce the weight significantly and lead to a cleaner print.