This thing uses the tracks, cogs, and associated motor mount frame from the ProtoTank by timmiclark. What this adds to timmiclark's design is an entirely new
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enclosed hull and turret with pan/tilt motion. It also features a removable battery cover, held onto the rear of the hull with magnets. Please see timmiclark's original post for the ProtoTank to obtain those files and information regarding motors and how to print/assemble the tracks.
The turret is designed for the Runcam Owl or equivalent FPV cameras with the same mounting interfaces.
The aft body shell has a small "chimney" to mount the AKK X1 5.8 Ghz Transmitter.
There are standoffs/mounts on the underside of the forward body shell to mount a FrSky XSR or D4R-ii 2.4 Gz Rx.
For power distribution, I just re-used an old power distribution board from a ZMR180 quadcopter that I had laying around.
For power, I am using a Turnigy nano-tech 1300mah 2S 25~50C Lipo Pack. Run times and performance have been excellent with this, and it fits nicely in the hull.
All hardware is M3. Recommend purchasing an assortment of M3 screws with nuts and washers.
The turret uses two servos. 1 for yaw, 1 for pitch. I used: ElectroBot 2X Pcs Sg90 Micro Servo Motor 9G Rc Robot Helicopter Airplane Boat Controls. You will have to trim the tips of the control horns to get the right fit.
Note: Some of the component-level photos shown here are "version 1" components, but I posted them for assembly help where design changes did not impact how parts fit together.
"What's the difference between TurretPitchTableV3.stl and TurretPitchTableV4.stl?" - TurretPitchTableV4 is 1mm thicker in the front right corner, where the control horn for the servo is "clamped". This was added to get rid of the "jiggle" on the pitch axis that you can see in my video. The source FreeCad file was also uploaded, so you can change to suit your servo/control horn. The extrusion you'll want to edit is Pad003, which is extruded from sketch, "AntiPitchJiggleExtrusion". Of course, you could also just wrap tape around your control horn to make it fatter too. Likewise, "PitchHornDownRestraintV2.stl" is also intended to provide a tighter "clamp" on the turret pitch servo control horn.
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PARTS PARTS PARTS!!!! - These are all from Amazon (US), and I've copy/pasted the exact item descriptions so you can easily search for them.
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-Black PLA: HATCHBOX PLA 3D Printer Filament, Dimensional Accuracy +/- 0.03 mm, 1 kg Spool, 1.75 mm, Black
-Gray PLA: HATCHBOX PLA 3D Printer Filament, Dimensional Accuracy +/- 0.03 mm, 1 kg Spool, 1.75 mm, Gray
-Qty 4 Motors: Doradus 5Pcs DC 3V-6V Dual Axis Gear Reducer Motor For Arduino Smart Car (source: Amazon)
-Qty 2 ESCs: Hobbypower RC 20A ESC Brushed Motor Speed Controller for RC Car Boat W/O Brake. Each side of the tank gets one ESC. Wire the motors to the ESC i
