Quadracopter update — not that anyone asked — Prototyping new landing gear with clear legs for LED lights for night flight (red in front, blue in back) and 16 centimeters of clearance for a GoPro mount below the body. 4 centimeters to spare for hard landings and leg flex. Interchangeable with lighter gear for stunt flying when the camera isn’t attached.
In this photo the old landing gear is still attached and it is just sitting on the new gear. I haven’t built the new dampening mechanism yet. Was told by an engineer friend that my springs on the current video/camera front mount “were dampening for the wrong frequency” so while I will keep those for hard landings, I am shifting mass to the landing gear to lower the COG and and putting ALL of that on the other side of several sheets of rubber/foam between new aluminum plates to smooth out the video against the electric motor generated high frequency vibrations.
The main-plate vibration dampening sandwich is tentatively set to look like this:
============================== <-- 1/16 aluminum sheet ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <-- rubber sheet ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <-- rubber or foam sheet ------------------------------ <-- 1/32 aluminum sheet
possibly counter-opposing cut-outs in the aluminum sheets to save more weight.
/\ /\ / \ / \ \ / \ / \/ \/ ========================= /\ /\ /\ / \ / \ / \ \ / \ / \ / \/ \/ \/
Not necessarily that pattern. It was the best I could do with a <pre> tag and years since I did ASCII art (kids – ask your grandparents what that was.) But you get the idea.
Anyway, the first adhesive test failed having problems with sticking to the aluminum. Although a sage friend this morning suggested cleaning everything with rubbing alcohol before joining might fix it. If not it will be size 4 or 6 bolts with rubber washers holding it all together so there will still be no metal-to-metal contact for the vibrations to pass through. I just need to be sure the adhesive won’t come off if I do a roll with the camera attached. That would be bad.
Or to put it another way, the quad is not flying this week, but will be back with new capabilities by the end of the weekend. And then you won’t see the rotors in the video like this one
So if you see a camera and landing gear falling out of the sky with no vehicle attached, please return it? Thanks!