Thread: Build Log FPV Quadcopter
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Old Aug 23, 2011, 10:36 AM
cactus is offline
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Micro FPVer
United States, CO, Durango
Joined Sep 2001
6,650 Posts
Update

In an effort to improve the flight handling for fast forward flight and wind as well as added endurance, I have decided to make some big changes for this quad. I also have noticed lines in my video as well as the goggles getting very hot.

First things first, I revamped my ground station to help my goggles and vRx to run cooler and cleanup any noise. I now run both my goggles and the vRx off a Castle Creations 10amp BEC set at 7.4 volts. I can use a 2 or 3s pack interchangeably. When my Rx needs 12volts, I have a feed cable right after the battery connection that will give whatever the battery out is. Torrid wraps on all power inputs. I also put torrid wraps on the camera to tx connection. My video is nice and crisp with no more wavy lines or fuzziness.

For the quad, I have decided to reduce as much weight as possible and move to a smaller, tighter frame with less flex. So I am going to swap out the 550mm arms for the 450mm ones. Since I only use one motor on each arm, I don't need the X8 motor mounts taking up weight. I suspect some of my problems with more aggressive flight has to do with the fact the 550 arms flex and bent allot. This change drops the weight about 45-50 grams alone.
I will use the same electronics, but will likely cut out excess wiring and the extra plates and move some gear out onto the arms. I am starting over with the setup too. Redo radio calibration, ESC calibration and change motor timing to high. I hope to drop at least 150 grams, maybe more. Time will tell if this was worth it.

Edit: I completed the rebuild and my final weight comparisons are:

Before: 1058g No Lipo
Now: 910g No Lipo

My AUW before with 3s 3000 lipo was 1295g
My AUW now with 3s 3000 lipo is 1145g

So I got close to my goal. If I can come up with lighter landing gear then that will put me closer to 200g lighter than before. Flight tests this weekend.
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Last edited by cactus; Aug 24, 2011 at 11:09 PM.
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