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Archive for August, 2017
Posted by flyinghedgehogs | Aug 29, 2017 @ 12:07 AM | 11,852 Views
In 7-9 weeks, Oleg will deliver a special package.. Build thread will be below..

Edit: 11/7/17
Just got the magic email! They ship Thursday 11/9/17!
Edit: 11/16/17
They Arrived! Pictures below:
Posted by flyinghedgehogs | Aug 16, 2017 @ 03:44 PM | 11,351 Views
Recently I have been helping my brother fix his ELF after an unexpected tail detachment on launch. As we were rebuilding it, we observed that the v-mount that holds and hinges the elevator was gone. Looking at Kennedy Composites, we observed that not only the cost of shipping was greater than the cost of the part, but the part would arrive one day after our deadline to get the ELF flying. Considering our options, we realized that we had all the materials and know-how to make our own v-mount. We dug up several scraps of balsa , a broken ELF boom, and retrieved our stock of packing tape, thin CA, Textreme unidirectional carbon, and Carboweave CW 20. Measuring the inside dimension of the v-mount off of the v-mount affixed to my ELF, we determined the angle of the balsa scraps relative to the boom. We then filled the cracks and low spots in the mold with baking soda and thin CA, as seen in the first picture. We then put a piece of packing tape over the mold, making a "mold releasing" surface. The lay up scheme went as follows. 1) Tack down one end of a small strip of Textreme to one ear of the mold with Medium CA and let it set up. 2) Tack the other end to the other ear and let it set up. 3) Dribble thin CA over the whole part. 4) Repeat with alternating lavers of CW 20 and textreme. We used 5 of each. Once all the CA has completely cured, we removed the part from the mold, trimmed it and drilled holes. Then we sealed the edges using thin CA.

We also did strength analysis on a piece of scrap by drilling the hole closer to the edge of the material than we had did on the final part, and could not strip out the hole with both our best efforts.

Feel free to comment below..