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Home > ELEV-8 Tutorials > ELEV-8 v3 Quadcopter Assembly Guide
ELEV-8 v3 Quadcopter Assembly Guide
Congratulations and thank you for purchasing a Parallax
California, USA. If you require assistance, please do not hesitate to e-mail or call us
These instructions are for the Parallax
ELEV-8 v2
, go to the v2 Assembly Guide
[3]
Version" link at the bottom-right corner of this page (it may take several minutes to load). Be advised it's around 100
pages when printed.
If you have an ELEV-8 Quadcopter you must register it with the Federal Aviation
Administration's UAS Registry
Preparation
This guide will take you through assembly and configuration of your ELEV-8 v3 Quadcopter Kit. But first, go through
the Preparation list below.
Please do not rush through the assembly and testing process! Go slowly and don't
skip anything, to avoid a dysfunctional quadcopter and extensive troubleshooting.
It never hurts to double-check your work at each step!
http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]
ELEV-8 v3 Quadcopter
ELEV-8 v3 Quadcopter
instead.) To work offline or from paper, Click on the "Printer-Friendly
[4]
before flying outdoors.
[5]
, designed and manufactured in
[1]
.
[2]
(#80300) in its standard configuration. (If you have the
[1]

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Summary of Contents for Parallax ELEV-8

  • Page 1 Preparation This guide will take you through assembly and configuration of your ELEV-8 v3 Quadcopter Kit. But first, go through the Preparation list below. Please do not rush through the assembly and testing process! Go slowly and don't skip anything, to avoid a dysfunctional quadcopter and extensive troubleshooting.
  • Page 2: Additional Items Required

    Sales folks (888-512-1024). Note that some items are small sub-kits with parts not listed separately. (Also, parts and quantities are subject to change without notice). 3. BEFORE beginning assembly of your ELEV-8 v3 Quadcopter, please read the entirety of the UAV Safety, Laws, and Good Citizenship tutorial.
  • Page 3: Section 1: Assemble The Booms

    Hobby, Inc. and Bachmann Industries, Inc. Section 1: Assemble the Booms In this section, you’ll be assembling the four booms, or "arms" for your ELEV-8 v3. Warning! As tempting as it may be, DO NOT attach the propellers or propeller adapters to the motor yet.
  • Page 4 A PDF of the above drawing is available for download here [22] Step 1: Loctite® Motor Set Screws Apply Loctite® to the motor set screws to prevent them from loosening during flight and potentially causing equipment failure. Tools Needed: http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 5: Parts Needed

    Work over a paper towel or other disposable work surface for easy cleanup! If your motors have two set screws, remove and Loctite® the second set screw only after reinstalling the first one. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 6 #1 Philips Head Screwdriver Parts Needed: 4 – KEDA 1000kV Outrunner Motor (#750-900010) 4 – ELEV-8 v3 Motor Mount (#721-80304) 16 – Machine Screw, M3-0.5 x 6mm [21] Tip! For your reference, wherever hardware is included in a Parts list, just click on the item link to open this image in a new window.
  • Page 7 You may need to flip or rotate your mount around (so it may not match the shown image). http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 8 3. One at a time, insert four screws into the inner-most holes on the motor mount bottom, making sure to line up with the threaded holes in the bottom of the motor. Tighten with the screwdriver. 4. Repeat this process for the three remaining motors. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 9 Tools Needed: Needle Nose Pliers (optional) Parts Needed: 4 – Motor/Mount Assemblies from Step 2 2 - ELEV-8 v3 Boom - Silver (Clear Anodized) (#730-00065) 2 - ELEV-8 v3 Boom - Blue (#730-00066) 4 - Black Rubber Grommet (#700-00140) Instructions: 1.
  • Page 10 4. Pull/push the wires all the way through the boom until they emerge from the other end. You may find needle nose pliers helpful to pull the wires through. 5. Fit the grommet into the hole. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 11 6. Repeat this for the other three booms. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 12 Now you will be fastening the motor mounts to the booms and attaching one side of the landing gear. Tools Needed: #1 Philips Head Screwdriver Parallax Combination Wrench (#700-10025) Parts Needed: 4 – Motor/Mount/Boom Assemblies, prepared in Step 3 4 – Landing Gear (#721-80007) 8 –...
  • Page 13 4. Take the short side of the landing gear (see the last image on this page) and feed it over the screw next to the motor wires, followed by the locknut. 5. Place a washer over the other screw, followed by a locknut. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 14 6. Using the screwdriver and wrench, tighten (clockwise) until there is no longer a gap between any parts (including nut or screw-head). Then turn the locknut one more full rotation and stop. Do not turn more than this or you may begin to crush the boom. 7. Repeat for the other three booms. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 15 Step 5: Insert Tube Plugs In the final step of boom assembly, you'll be fitting plastic caps to the end of the booms, which will help protect them from impact and gives the ELEV-8 a cleaner look! Tools Needed: None Parts Needed: 4 –...
  • Page 16: Section 2: Assemble The Chassis

    3. Repeat for the other three booms. Section 2: Assemble the Chassis In this section, you will assemble the ELEV-8 v3 Quadcopter chassis, following the four steps below. This section will take approximately 0.5 to 1.5 hours, depending on your skill level and equipment.
  • Page 17 Step 6: Prepare the Top Chassis Plate Chassis assembly starts with laying out the hardware and placing the top chassis plate upside down on an elevated surfase, so that the booms can be positioned level in the next step. Tools Needed: http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 18 2. Holding the top chassis plate upright with the front toward you, place 1 3/8” screws through the holes indicated by red circles, and 1 5/8” (or 1 3/4") screws through the holes indicated by blue circles. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 19 3. Place the book or box (shown here as foam) over the plate and hold them together as you flip them over, so that the top plate is upside-down and the front is now aimed away from you. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 20 (appear silver in color) booms will be at the front, and the blue anodized booms will be at the rear. Parts Needed: 4 – Motor/Boom Assemblies, prepared inStep 5 1 - Top Chassis Plate, prepared in Step 6 http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 21 2. Repeat with the other silver boom over the front left pair of screws. 3. Put the remaining two blue booms over the back two pairs of screws. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 22 With everything prepared, you will now carefuly attach the bottom chassis plate. Some patience will serve you well here. The ELEV-8 v3 is designed with tight tolerances to achieve the strongest and most rigid from possible, so it may take a miniute or two to get everything lined up properly.
  • Page 23 2. Slide the bottom chassis plate over the screws, so that the large hole is towards the front (farthest away from you). 3. Slide the landing gear over the outer screws. 4. Thread locknuts onto all eight screws. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 24 Adding the foam pads more firmly secures the battery in place and also works to prevent slipping. Tools Needed: Scissors Parts Needed: 1 - Chassis Assembly, prepared in Step 8 4" - Foam, Adhesive-Backed (#900-00105) 2 - Hook and Loop Cable Tie (#900-00021) Instructions: http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 25 1. Using the scissors, cut the foam padding in half, creating two 2” strips. 2. Orient the ELEV-8 so that it is upside-down and facing away from you. 3. Remove the protective paper backing from each piece of foam and attach to the bottom chassis plate, as shown in the figure below.
  • Page 26 4. Taking the narrow end of one of the hook and loop cable tie, feed it through the slot in the bottom chassis plate shown in the image below. 5. Insert the strap back into a slot three spaces away from the current one, and feed it up through the chassis. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 27: Section 3: Connect The Escs

    6. Use the same procedure to install a second strap on the other side of the ELEV-8. Section 3: Connect the ESCs In this section, you will connect the electronic speed controllers (ESCs), following the 3 steps below. This section will take approximately 10 to 30 miniutes, depending on your skill level and equipment.
  • Page 28 ESCs at that time. Parts Needed: 1 - Chassis Assembly, prepared in Step 9 4 - Parallax xRotor 20A ESCs (#750-90015) Instructions: 1. Arrange the wires exiting each boom at the center of the chassis so that they go to the right.
  • Page 29 Step 12: Route ESC Signal Cables through Chassis For a cleaner apperance and better protection, route the signal cables for the ESCs up through the center of the top chasis plate. Parts Needed: 1 - Chassis Assembly, prepared in Step 11 Instructions: http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 30: Section 4: Make The Isolation Assembly

    Parts Needed in this Section 8 - Machine Screw, #4-40 x 3/8” , #1 in drawing below [21] 1 - ELEV-8 v3 Flight Controller Cover (#721-80300), #2 in drawing below 4 - Nylon Machine Screw, #4-40 x 5/8" , #3 in drawing below [21] 1 - ELEV-8 Flight Controller (#80204), #4 in drawing below 4 - Nylon Spacer, #4 x 3/16"...
  • Page 31 Tools Needed: Paper Towels or other disposable work surface/wipes #1 Philips Head Screwdriver [14] Flat-Nose Pliers [17] Parts Needed: 1 - Isolation Plate (#721-80301) 4 - Screws, #4-40 x 3/8" [21] 4 - Standoffs, #4-40 x 7/8" [21] http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 32 2. Feed a screw through one of the holes indicated in the image below. Thread on a standoff from the opposite side and hold pliers while you use the screwdriver in the other hand to tighten. Tighten until you start to feel resistance, and then one ¼ turn. 3. Repeat this for the remaining three standoffs. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 33 [21] 4 - Nylon Hex Nut, #4-40 [21] Warning! The ELEV-8 Flight Controller is a sensitive piece of elecrical equipment. Handle it with care, and do not expose it to water or static elecricity. Instructions: 1. Feed the nylon machine screws through the holes in the flight controller.
  • Page 34 4. Slide the power distribution board down over the four screws, facing up (while the assembly is upside-down). 5. Slide the 1/8" nylon spacers over the four screws. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 35 1. Hold the isolation assembly upside down so that the front of the flight controller is facing away from you. 2. Carefully feed the cable from the left side in between the isolation plate and power distribution board and plug it into the header at the front of the board (farthest from you). http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 36 4. Double-check to ensure that the cable is plugged in correctly: WARNING: If the 3-pin cable connecting the flight controller to the power distribution board is plugged into the 3-pin header incorrectly, it will destroy your flight controller when you connect your battery! http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 37 [14] Parts Needed: 1 - Isolation Assembly, prepared in Step 15 1 - Foam, Open-Cell Block (#900-00106) 1 - ELEV-8 v3 Flight Controller Cover (#721-80300) 4 - Machine Screw, #4-40 x 3/8” [21] Instructions: 1. Using the scissors, cut the foam block in half.
  • Page 38 FC points away from you when the writing on the cover plate is oriented towards you. 5. Thread the screws into the standoffs with your screwdriver, just until you start to feel resistance. Do not overtighten. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 39: Section 5: Install The Electronics

    Section 5: Install the Electronics In this section, you will install the isolation assembly and electronics in your ELEV-8 v3 Quadcopter, following the 4 steps below. This section will take approximately 30 to 60 minutes, depending on your skill level and equipment.
  • Page 40 Don’t push too hard or use a sharp object, as that may damage the dampers. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 41 2. Place the isolation assembly over the chassis, lining up the front of the chassis with the arrow on the flight controller. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 42 3. Carefully feed the top flange of each damper through the corresponding hole on the isolation plate. Step 18: Connect the ESCs to the PDB and FC With all the major components of the ELEV-8 v3 installed, the wiring process begins with connecting the ESCs. Parts Needed:...
  • Page 43 2. Orient your ELEV-8 so that it is upright and facing to your right. Locate the ESC/AUX header pins on the right side of the flight controller (the side closest to you). 3. Take the ESC signal cable that you labeled 1 and insert into the farthest left pins (labeled 1 on the flight controller PCB) oriented vertically so that the black wire is on the bottom and white wire is on the top.
  • Page 44 Step 19: Connect and Mount Your Radio Receiver In this step you will connect the signal cables for the receiver to both the ELEV-8 Flight Controller and the receiver, and then mount the reciever to the chassis. Tools Needed: Flat-Nose Pliers...
  • Page 45 THRO, AILE, ELEV, RUDD, GEAR, and AUX 1, respectively), keeping the orientation you determined in Instruction 1. (Spektrum AR610 receiver shown below.) 3. Now, locate the pins for the receiver signal cables on the left side of the flight controller (“Receiver Port” is written http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 46 4. Plug the throttle channel into the farthest left pins (labeled 1 on the flight controller PCB) oriented vertically so that the black wire is on the bottom and white wire is on the top. 5. Using the same orientation, plug in the remaining cables in the following order: THRO-AILE-ELEV-RUDD- GEAR-AUX 1. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 47 Alternate Mounting (Best for receivers w/ headers on their side, such as Spektrum AR8000): 7. Feed the receiver cables down through the hole in the center of the chassis, and mount the receiver to the underside of the chassis as shown below. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 48 Instructions for Antenna / Satellite Module 8. If your receiver came with a long antenna, you can mount it as shown below: http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 49 It is now time to install the battery underneath the chassis. Thanks to the hook-and-loop straps, it can be easily removed for charging and storage. Parts Needed: 1 - ELEV-8 v3 Assembly, from Step 19 ELEV-8 PDB Power Cable, 6" (#800-00300) –...
  • Page 50 2. With the ELEV-8 upside-down, slide the battery through the straps so that the battery leads face the back of the ELEV-8. 3. Take one end of the strap in each hand and pull firmly apart and slightly up to tighten, and then push down to secure.
  • Page 51: Section 6: Software And Firmware

    This section will take approximately 1 to 2 hours, depending on your skill level and equipment. Parts Needed in this Section ELEV-8 v3 Assembly w/ LiPo Battery, prepared in Section 5 Fully Charged RC Radio Transmitter (not included) RC Reciever Bind Plug (not included) SD Card &...
  • Page 52 Radio transmitters come with an overwhelming array of settings. This step will guide you through configuring your transmitter so that it can properly control your ELEV-8 v3. Below is a table of transmitter setting recommendations for flying the ELEV-8 v3, regardless of transmitter selection. You will also bind your transmitter to your receiver, which enables your particular transmitter to control your particular receiver for the ELEV-8 v3.
  • Page 53: Configuration Instructions

    7. Scroll right to “Select Option”, and click. Scroll right until “Import Model” appears and click again. 8. Scroll to select the “001~ELEV-8 v3.SPM” file on the SD card. When prompted, scroll then click to select “Import.” This will import all configuration settings.
  • Page 54 When prompted "Data will be reset", select "Yes". 5. Scroll to “Model Name” and click once. Use the roller to name your model (we suggest “ELEV-8 v3”); scroll until the cursor is under the character you wish to edit, then click once; scroll until the character you want appears, then click again to save.
  • Page 55: Step 22: Install Software

    2. Make sure your transmitter is switched off and the throttle is all the way down. 3. Connect the battery to the PDB Power Cable to provide power to the ELEV-8. The LED in the receiver should be flashing rapidly.
  • Page 56 Instructions: 1. Connect your ELEV-8 flight control board with to your computer's USB port with a USB A to micro B cable. 2. Wait for your computer to install any necessary drivers. It should say “Your device is ready to use”...
  • Page 57 During calibration, only actuate switches for the axullary channels. Do not move Dual-Rate (D/R) switches (leave them in high or disable them), or Throttle Arm/Disarm switches (leave in "Arm" postion). This is especially important for the Spektrum DXe Transmitter. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 58 9. Flip the Gear switch down (and if desired, any Aux switches or knobs) and push both sticks down and to the left. Hold them there until the timer runs out and the yellow bar at the bottom of the screen disappears. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 59: Section 7: Configure The Escs

    You can reassign and reverse the channels by using the checkboxes and drop-down menus for each channel. This will allow you to fly your ELEV-8 v3 according to your preferences.
  • Page 60 Watch for screen indicators. 1. Connect your ELEV-8 Flight Controller to your computer's USB port with a USB A to Micro B cable. 2. Launch the Parallax GroundStation Application & navigate to the System Test tab.
  • Page 61 2. Open the ELEV-8 GroundStation software. The Status tab will be displayed first. Use the information displayed in the bottom-left corner to verify that the ELEV-8 v3 is properly connected. It will display “Connected” if it is 3. Once the ELEV-8 v3 is connected to the GroundStation software, click on the System Test tab.
  • Page 62 If the Motor Did Not Spin in the Correct Direction: 5. Turn the ELEV-8 over and locate the ESC corresponding to (matching the number of) the motor in question. 6. Locate any two of the (three) blue extension wires running to the ESC and unplug them from the ESC.
  • Page 63 With the motors all spinning the correct directions, you can now secure the ESCs so that they don't move during flight. By securing them to the booms, they won't get in the way of folding up your ELEV-8 for transport if you ever choose to do so.
  • Page 64 2. Take the ESC connected to the wires coming out of that boom and place it up against to boom, with the wires above it, inside of the zip tie. Fasten the zip tie loosely around the ESC and wires as shown below. 3. Feed another zip tie around the boom and fasten as shown in the picture below. http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 65: Section 8: Final Testing

    At the end of the Step 30, you will be you will be directed to the How to Fly a Multirotor sUAV tutorial, where you will learn to fly your ELEV-8 v3. DO NOT attempt to fly your ELEV-8 v3 until you have read through both this and the UAV Safety, Laws, and Good Citizenship tutorials, as you may put yourself and others needlessly at risk.
  • Page 66 If you release the button the transmitter will go back to Full Power. You should have full control of your ELEV-8 from this distance. If you are unable to arm/disarm your ELEV-8 v3 as described below, do not fly! Some component of your system is malfunctioning and you should begin troubleshooting.
  • Page 67 When the ELEV-8 v3 is unarmed, the RGB LED on the flight controller will be green. There is also a different color that flashes to indicate the flight mode (gear). The LED's flash color pattern indicates the ELEV-8 v3's Status and Mode:...
  • Page 68: Arming Procedure

    Disarmed (Manual Mode - Green with Orange Blink): Arming Procedure: To arm the ELEV-8 v3, make sure that the Gear Switch is in the correct mode, and then push and hold the transmitter sticks down and to the center: The RGB LED on the flight controller will turn yellow: After 1 second, the flight controller will beep, the RGB LED will...
  • Page 69: Disarming Procedure

    Disarming Procedure: To disarm the ELEV-8 v3, push and hold the transmitter sticks down and away from the center: The RGB LED on the flight controller will turn yellow. After 0.5 seconds, the flight controller will beep, the RGB LED will turn green with a mode color blink, and the propellers will stop spinning.
  • Page 70 Motors. Tools Needed: #1 Philips Head Screwdriver [14] Parts Needed: ELEV-8 v3 Assembly, prepared in Step 28 Flat Head Phillips Screws, M2 x12mm (four included with each motor) – 4 – Propeller Adapters (one included with each motor) Instructions: 1. Remove the nut and washer from the top of each propeller adapter and set aside for use in the next step.
  • Page 71: Step 30: Attach Propellers

    STOP!! Propeller blades can cut skin. Do not install propellers until you are ready to fly in a properly prepared indoor OR outdoor flying area. Never install [33] [34] propeller blades on a quadcopter in a classroom or a bench testing area. Never http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 72 5/16" Wrench, 5/16" Socket, or Adjustable Wrench Flat-nose Pliers Parts Needed: ELEV-8 v3 Assembly, prepared in Step 29 4 – Propeller Adapter Nuts (one included with each motor) 4 – Propeller Adapter Washers (one included with each motor) 2 – 11x4.5 CCW (L) Propeller (#721-80040) 2 –...
  • Page 73 4. Thread a nut onto the adapter and tighten until it makes contact with the washer and propeller, and the resistance increases; then tighten another 1/4 turn. 5. Using the same procedure, attach a CW (R) propeller to motor #3. Attach a CCW (L) propeller to motors #2 and http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...
  • Page 74 ELEV-8 v3. [35] PLEASE DO NOT attempt to fly your ELEV-8 v3 until you have read through both the How to Fly a Multirotor sUAV and UAV Safety, Laws, and Good Citizenship tutorials, as you could put yourself and others needlessly at risk.
  • Page 75 [18] http://learn.parallax.com/sites/default/files/content/ELEV-8/Tools/tool_dikes.jpg [19] http://learn.parallax.com/sites/default/files/content/ELEV-8/Tools/tool_flathead.jpg [20] http://learn.parallax.com/sites/default/files/content/ELEV-8/Tools/tool_wrench2.jpg [21] http://learn.parallax.com/sites/default/files/content/ELEV-8/v3-Assembly/v3-HardwarePackSingles-Labeled.png [22] http://learn.parallax.com/sites/default/files/content/ELEV-8/v3-Assembly/80300-BA%20RevA03.PDF [23] http://learn.parallax.com/sites/default/files/content/ELEV-8/v3-Assembly/80300-CA%20RevA01.PDF [24] http://learn.parallax.com/sites/default/files/content/ELEV-8/v3-Assembly/80300-IA%20RevA03.PDF [25] http://www.parallax.com/downloads/spektrum-dx6-or-dx7-configuration-file [26] https://www.parallax.com/downloads/simpleide-propeller-c-software-windows [27] https://www.parallax.com/downloads/simpleide-propeller-c-software-mac [28] http://www.parallax.com/downloads/elev-8-flight-controller-firmware [29] http://www.parallax.com/downloads/parallax-groundstation-software-windows [30] https://www.parallax.com/downloads/parallax-groundstation-software-mac [31] http://learn.parallax.com/elev-8-v3-quadcopter-assembly-guide/step-21-configure-transmitter-and-bind-receiver [32] http://learn.parallax.com/sites/default/files/content/ELEV-8/v3-Assembly/Step25-ThrottleCalibrationBeeps.zip [33] http://learn.parallax.com/uav-safety-laws-and-good-citizenship/flying-indoors [34] http://learn.parallax.com/uav-safety-laws-and-good-citizenship/flying-outdoors [35] http://learn.parallax.com/how-fly-multirotor-suav http://learn.parallax.com/print/book/export/html/1186[26/09/2017 12:28:19]...

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