250 slimbuild (zmr rework)

thingiverse

Here is the rewritten text: Most streamlined, thinnest build design ever created using the ZMR250 as a foundation. The fundamental differences are immediately noticeable in the general frame/arm layout, specifically designed to correct the slightly odd motor to motor dimensions of the stock ZMR250 frame (namely, it's not a true X configuration which leads to instability and flight flaws). I repositioned the arms to make this design a fully true 250 X frame, requiring drilling 4 new holes in one of the main plates, but nothing too insane or difficult to accomplish. Secondary to the frame correction, I wanted to take the concepts used on my Glowrider design (https://www.thingiverse.com/thing:3065911) to the next level and literally slam this design to its limit, making it as slim as possible. But that's not to say I made any sacrifices. The configuration includes a F4 45amp OSD AIO ESC&FC board, FrSky X6B RX, Foxeer Arrow Micro, Eachine TX03 0/25/50/200mw VTX, Racerstar 2403 2300kv motors, and onboard DVR (optional but worth it in my opinion). The AUW is 268g (minus lipo), and the configuration flies like a trooper, very fast, with lots of grunt, very rigid & durable. Added DVR with decent cam means I don't fly an actioncam anymore. The best part is that it's lost the typical ZMR flight flaws as it's now a true X frame. A visual example of the frames depth shows just how thin it is - thinner than the width of a 5pence piece, at 14.9mm thick. Any thinner and the FC/ESC would have been grazing the top and bottom plates, which would have transmitted vibes (not to mention Carbon's conductive properties would have undoubtedly shorted something out). To make that depth possible, I didn't use standoffs for the FC and instead seated it on a 2x layer of 3M double-sided foam tape, killing vibes and holding the board exactly where I wanted it.