This difference between this post and my other about building multirotors is this is mainly to do with designing a custom frame, however i thought rather than post links to the next tutorial, i would include it both for posterity and ease of use to those reading through and learning.
I currently pay to use my college laser cutter, unfortunately i have finished my course so i will not have the regular access i once had, part of the reason for submitting this instructable is in the hope i win the epilog challenge and can open a mini business selling my designs or at the very least open a world of possibility in design for me, not having to tiptoe around my college time table.
i hope you like my video intro
Step 1: New designs
I was in contact with a company that studies copter and found interesting design features that increased efficiency and stability.
Anging the motos on a 10 degree tilt increases stability significantly, Raising the motors above cg can make the copter more stable and mounting the motors under the frame rather than on top gave a 9% power and efficiency increase in flight due to no turbulence on the frame.
So i had that in mind for one frame, my other frame i wanted to be compact, so i could easily take it places without using up too much space.
So i wanted a folding frame but the conventional frame where the arms all fold down was a big issue, the joints had to be large to withstand the force they would be under and i would need 8 joins that add weight and unreliability,
So i came up with an entirely new frame that as far as i can see has never been made before. :)