Bix3 with APM Plane Upgrade for QuadPlane
My Bix3 had already been set up for APM Plane using a Pixhawk so all I needed to do was to modify it to become a QuadPlane.
I decided to use some old (very old) components from my FW550 setup that was originally used to test the first RTFhawk. I had iPower 2212 1000kv motors and Next Level 20-amp ESCs that preceded the SimonK versions. On a 3s or 4s Lipo pack, the system worked great with Graupner 10x5 props and now the much less expensive copies called HQ 10x5 props. Note that these iPower 2212 motors can be purchased in the US for only $8 at Altitude Hobbies.
My other FW450 quad used the same setup on APM Copter with a 4s 4AH Lipo and could easiliy lift a Tarot 2-axis gimbal and Hero3 camera. The total flying weight was 58oz so this was my goal for my Bix3 conversion.
My loaded Bix3 frame weighed 15oz and the wing 10oz. The 3s 4AH Multistar Lipo pack weighed 9oz so this left me with a 20oz play weight for the QuadPlane addition. My 4 iPower 2212 1000kv motors and Next Level 20-amp ESCs and 4 HQ 10x5 props weighed only 15oz so I had 5 oz to spare.
I decided to use a ZIPPY Flightmax 2800mAh 4S1P 30C Lipo pack to start which weighs an ounce more than my previous 3s pack so I still had 4oz to spare for extra wires. I was off to a good start!
I decided to use the same 15mm Carbon Fibre Square Tubes from Tridge's conversion to mount the motors. The Bix3 wings needed an offset which was equivalent to an inexpensive hardwood shim sold at home improvement stores like Home Depot. Cutting one in half gives you the needed 15mm width for the 15mm carbon tube. Simply cut away the black stripe decal center and epoxy in place. Note that it is important to level the shims before the epoxy sets.