Following the death of the Ugly Pink Quad's 4th thruster, Entirely accidentally, I am going for a tri-rotor design, on
a 1/4" plexiglas base, with 3 Futaba S3003 servos for vectoring thrust.
The Nano that was originally being used for the Ugly Pink Quad, and now the Tri, well...it died, so in comes the DFRobot RoMeo.
My initial idea is going to be to use the thrusts of the three ducted fan units to stabilize horizontally and control altitude, while using vectoring to produce the X-Y translations and yaw motions as needed.
Given the wide, flat body and the ability to vector thrust, I might be able to use the plexiglas as a lift-generating device to aid battery life when not merely hovering.
Given that lift, and position can be somewhat decoupled, it may end up a very stable platform for cameras and such, even in breezy conditions.
I hope to have the IMU stream stabilizing the platform by mid-week.
First test with the AFSoftwareSerial for COMMs with the ArduIMU seem promising.
Comments
you never fail to impress me!
do you have photos of any other robots or anything you have made? I kind of like your style :D
OH! And it's an ArduIMU+ V2.
"I'll take a closeup of the fan to servo mounting tonight as comedy relief for the forum :-) If it works as-is, I'll be making something MUCH more robust soon."
Also, the decision to go ducted fan has caused much discussion and second-hand "I read that some guy said that (insert variable here) isn't as good", so I'll do some research to get some concrete numbers, thrust-curve comparisions, and real-world trials between equivalent-thrust open-props vs ducted fans, with respect to quad/tri/birotor/single prop VTOL setups.
Should make for a very interesting and noisy weekend soon ;-)
I may have to do some mixing with the vectoring and throttle, but at the moment it hasn't been in-air yet.
I designed in a little camber to the mounts, which I hope will act similar to a wing's dihedral. If it does, then stabilization should require very little change in fan speeds, leaving fan speed entirely linked to elevation.
I'll take a closeup of the fan to servo mounting tonight as comedy relief for the forum :-) If it works as-is, I'll be making something MUCH more robust soon.
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