Another LOS video, recently done, love this one
Just a short Blog on this build, it's been a pleasure to build the kit, and i think i might just get another, maybe even the new Trikopta.
Specs so far
1 x Multiwiicopter Scarab 12
4 x Carbon Bird 750kv motors
4 x Rc Timer 30amp ESC
1 x Arducopter Power Distribution Board
1 x Castle Creations 10amp External BEC
4 x MPI 10 x 4.5 SF Props
1 x Spektrum AR7000 Rx-er
1 x Ardupilot Mega Board with barometer and gps
1 x Thunderpower 45c 3s 2250 Lipo
A quick word on prop balancing, i never used the normal method of removing material from the heavier blade or hub to balance, i chose to add weight to the lighter blade to equal the heavy one, as well as adding weight to the lighter side of the hub to equal the heavy one. A principal that i use on RC Helis, as you never remove material from any of the blades.
I used clear nail varnish for this, as it has proved to be very durable and weather resistant over the years of using nail varnish.
Video of the maiden flight above, lots of PID tuning left to do.
Pics of build in my Album under
Just uploaded another video with the most stable PID's i can get at the moment.
This is the link
This is a pic of the latest PID's
My biggest problem is trying to weed out the slight oscillations and keep the quad stable without it being sluggish. The rate roll and pitch are down as far as i can seem to get it without losing stability, as well as the stabilize roll and pitch. However it seems very twitchy to control, and i have about -50 exponential to try and smooth it out on both aileron and elevator.
It's tricky this PID tuning.
Any pointers from anyone out there in multicopter land.
September 9th 2011 Update
A Short LOS AV clip