![]() ![]() ![]() I could have used smaller/lower power ESCs, as the motors will only pull about 15A at 100% throttle, however several people told me that these Hobbywing XRotor units worked much more reliably with the low kv & high stator count of my motors. Unfortunately the physical size of the ESCs meant that there wasn’t really an alternative to having the motor wires pointing outward. Apologies for the non matching heatshrink colours, but I ran out of the correct diameter in red/black… Next I extended the power & signal wires on the ESCs, shortened the motor wires, fed the wires through the arms & bolted the motors in place with blue Loctite. The only thing I didn’t like was the amount of flux left over on the pin header connections, so I washed that end of the board with isopropanol. I checked the version of the STM32F4 & it didn’t have the 1MB limit of the earlier revisions. It seemed to be a decent sample, with all of the surface mount kit straight/neatly soldered & with a piece of foam over the barometer. I started off by inspecting the Pixhawk that I bought from Unmanned Tech. ![]() I didn’t save a screenshot from eCalc with the 14″ props, but it didn’t make a huge difference. In the end I couldn’t find any 15×5.5 props with the correct hub design & realised that the motors would actually be slightly over their rated power at 100% throttle, so I opted for 14×5.5 instead which kept the motors happy even at 100%. Naturally I took the numbers from the eCalc simulations with a grain of salt, however they indicated that I was in the right ballpark roughly 7kg of thrust with a total weight of about 2.6-2.7kg, hovering stationary in no wind for 27 minutes. Pixhawk flight controller with uBlox M8N GPS.Toward the end of 2016 I decided that I wanted a large ‘copter for aerial filming & general ‘heavy lift’ something with a full GPS autopilot with plenty of configuration flexibility/component support, some sort of standard mounting system for equipment & enough power to safely lift arbitrary payloads of maybe a few kilograms.Īfter much research & learning how to use eCalc, I came up with the following parts list ![]()
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