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    APM (and all flight controllers) logic with regard to sensors incl. GPS

    With regard to the phenomenon known as "Fly-away", where a multi-rotor craft seems to just take off on a strange course and crash or get lost, I think the most likely culprit is the GPS. I have seen "fly-away" happen on the bench, using an APM 2.5.2 controller and LEA-6H GPS module. With good...
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    This has to be a record!

    Let's see, how did today go? I tried putting the APM 2.5.2 controller in my newer frame with all the power leads pulled from the ESC control leads, so only the power module was powering the flight controller. I took it through all the calibrations in Mission Planner, resetting all flight modes...
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    Best way to spin one motor?

    Is the best way to spin just one motor to connect the ESC to the receiver channel for throttle? I wonder if there is a tool that will spin a motor at a selected RPM, or selected voltage and I can do the math based on kv? Maybe sort of like an ESC programmer? I'm going to either have to deal...
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    HobbyPeople sales people learn too, maybe

    Last week, I decided to get a small RTF to do some indoor practicing. I started with the Udi U830A, a nano 2.4GHz quad with a plastic cage over the props. I found it too squirrely to control, so I took it back and traded up for the U816A on Friday -- a little larger, so it's a slower squirrel...
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    Modify Turnigy 9x to prepare for Firmware upgrade

    The Open 9x crowd has improved firmware for the Turnigy 9x and all other variants of this radio. That includes the FlySky, Eurgle and a few others. Their main Wiki page is: http://openrcforums.com/wiki/index.php/Main_Page The forum index is here: http://openrcforums.com/forum/index.php With...
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    I figured out the RCTimer "annunicator" (LED board)

    RCTimer sells a kit that I bought, with the ArduFlyer 2.5.2, a ublox LEA-6H GPS/compass, telemetry radio and transceiver, and this "annunicator" made by UAV Objects with four LEDs on it. The board has a sort of BEC on one end, marked "2-6S", and you connect the LED + leads to the right UART...
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    New quad lives... sort of. Motors get hot, and pitch is reversed.

    After all the configuration in APM, fixing MODE 1 vs 2, then fixing having reversed the throttle (because Turnigy's UI is a bucket of suck), I finally got the props on today. First a word about Turnigy motors. I have four D2836/8 motors (1100kv). They have grub nuts, two of which slid right...
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    Final setup -- Turnigy not arming APM

    Ok! I've got everything installed (and the flight modes in APM are awesome), but I think I had my Turnigy 9x in mode 1 when I did the setup in Mission Planner (2.0.10) because when I finally plugged in the battery and armed it by holding both sticks down and to the center, all the motors went...
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    What do motor numbers mean (if anything)?

    When shopping for motors, I get the kv and obviously I understand what comes after the $, but I've noticed most motors have a four digit number that doesn't seem to correlate with anything -- not the kv, poles, max current or size. I've also seen people on YouTube refer to their motors by these...
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    Has anyone tried aluminum or copper foil as a shield?

    I know both aluminum and copper foil are supposed to be good RF shields, so I'm wondering why they aren't used routinely in quads where the separation between receiver and ESC can't be increased due to the frame design? And is the ESC considered to be the biggest culprit? I suppose a powerful...
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    LiPo charging

    I fired up my Turnigy AccuCell 6 today, read the manual and watched a few videos on it. One thing doesn't make sense to me. Every source stresses that you must never leave a LiPo battery unattended while charging, due to the risk of fire or explosion. Ok, if the battery is going to go off...
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    GPS thru aluminum paint?

    *** updated *** I wound up buying a dome housing and mounting the GPS/mag above everything, but after getting responses elsewhere, I did line the bottom of the top deck with thick aluminum foil. *** I got a little plastic "IdeaFly" canopy for my quad at Hobby People, and got carried away when...
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    SMA vs. RP SMA what's missing besides the center pin?

    I got two reverse polarized SMA antennas by mistake. I needed them non-reversed. But the "reverse" basically means the host device has a tiny hole in the center of the connector, AND the antenna has the same hole. So if I fabricated a pin the right diameter, long enough to bridge the holes...
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    What power connectors do people prefer, and why?

    With parts trickling in, I now have a Turnigy battery with a red two-barrel shielded "pin and ring" connector, a Zippy battery with what looks like red and black uncircumcised dicks (with shrink tubing foreskins), and a power distribution board with a yellow "arrow" shroud with two pins inside...
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    Let's talk geometry -- is 90deg X (or plus) frame the MOST stable?

    As I wait for parts, I'm thinking of the job the controller has to do, and thinking about how this job is made harder or easier by the geometry of the frame, which spaces the arms and motors. Logically, it seems like a perfect 90deg. X (or plus) where the pivot point and motor spacing are...
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    Tracker TRK-BLK-1PK Bluetooth Tracking Device

    On Electronics Woot right now http://electronics.woot.com. The Tracker, for $15 (list price $32). It claims a range of 150ft using Bluetooth 4.0, works with Android or iOS software to let you track or find objects, alarm if they get out of range, or alarm if they get in range. Obviously it...
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    HobbyKing or RCTimer Arduino flight controller?

    I went with the ArduFlyer (RCTimer) and now all my parts are ordered. (my frame is here and built) frame: Quadcopter "Big Body" (QuadLugs) controller/autopilot: ArduFlyer 2.5.2 915Mhz telemetry (RCTimer) esc: 45A (Turnigy) motors: 1100Kv (Turnigy) propellers: 11x4.7, (Turnigy) motor to motor...
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    HobbyKing had a RUN on flight controllers!

    Just went (world wide warehouse side) to look at flight controllers for my build and found they're practically backordered on everything! They have one NAZA and some junk, but everything Arduino seems to be gone.
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    Questions on motors & props

    I did more research. For my 610mm QuadLugs big body frame I settled on Turnigy D2836 8 1100KV motors, and 11" x 4.7 props on 45amp ESCs. Powered on a 5000mah 4S 40C lipo. Placed a BIG order from HobbyKing this evening. Oddly enough, not for the props motors or battery that can come from the...
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    Astak CM-7500 ActionPro 3

    ** UPDATE ** While you can "flip" the video on this camera, it only flips the recording and the back display. It does NOT flip the analog composite video output! So if you want to use this for FPV, you have to mount it right side up. ** This camera is similar to the GoPro line, but at a much...
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