This is my Mini-Dragonfly. It is modeled after Josh's latest Dragonfly design.
It uses 5 inch booms mounted on the Electrohub frame. The motor-to-motor distance is 260mm between the Tri motors, oriented upwards. The distance between the center of each motor, and the center of the Naze flight controller, is 6 inches.
Everything is mounted on a T-rex 450 landing skid. This gives plenty of room to mount the battery and external voltage monitor under the Electrohub frame.
However, it only allows about 1/2" of clearance for the two inverted motors and the servo mounted under my Simplecopter.com inspired tilt mechanism.
I used this tilt design out of necessity as I had very little clearance/space for anything on the rear boom, and this also allowed the rear motor to stay in the same plane as the front motors, as well as kept the weight to a minimum.
I am really happy with this build. Initial flights have exhibited super stable flight characteristics. The yaw authority is enough to make my 250 mini-quads feel inadequate. It seems to have plenty of power with this 3S setup but I'm sure a 4S setup could easily be adapted for those feeling the NEED for balistic performance. It also has good visual orientation for those flying LOS, but I will soon be adding some FPV gear as I have become addicted to this method of flying. This multi-copter encompases all the fun of a mini-quad with the added benefits of a tricopter mixed in to a unique looking & performing multirotor in a sweet little package.
Specifications:
RTF Weight: 634 grams as equipped
Motors: SunnySky X2204S-16 KV:2300
ESC's: B-12A Ice Blue Series 12A SimonK
Flight Controller: Naze 32 Acro w/Baseflight (used for LemonRx Sat compatibility)
Receiver: LemonRX DSM2 satellite in SerialRX mode via a ZYX-S cable
Servo: BMS-385DMAX Digital/Metal
Props: 6"x4.5" HQ
Battery: 1800mAh 3S Nanotech
Flight Controller mount
Battery Voltage Alarm
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https://code.google.com/p/minoposd/wiki/AnalogRSSI
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How long did it take you to build?
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;)
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Im building a large Dragonfly, but this little guy has peaked my interest.
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