![\"TMotor1806-13KV2500\"](\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/02\/TMotor1806-13KV2500.jpg\")
<\/a><\/p>\nEach motor weighs 26g which is on the heavy side (for reference Cobra 2204 2300kv weighs 24.6g). The wires are long and should fit most mini-quad\u00a0builds. The prop shaft is\u00a04mm\u00a0which is thinner than the\u00a05mm popular the 18xx and 22xx class. This is a bit annoying as it requires prop adapters and carrying a different\u00a0prop wrench. Overall the motor has a solid feel to it,\u00a0with smooth rotation of the bell,\u00a0strong and well-protected base. The winding wire appears a bit thin compared to the DYS 1806, but the coils look tidy.<\/p>\n
The build<\/h2>\n
I wanted to go light to preserve power. The no-battery, no HD cam weight came to about 316g, which is not as light as I was hoping, but close enough. I opted for a QAV180 frame, not the lightest 180 but is very strong and versatile.<\/p>\n
- \n
- SPRF3 Flight Controller (Started with a Naze32 Rev6 but ran into bad gyro noise issues)<\/li>\n
- T-Motor 1806-13 KV:2500<\/li>\n
- LittleBee 20A ESC with BLHeli 14.4<\/li>\n
- DAL 4045BN, HQ 4045BN<\/li>\n
- FrSky D4R-II\u00a0with telemetry<\/li>\n
- Eachine ET600R 600mW VTX<\/li>\n
- Pyro Drone 1\/3 Sony Super HAD II CCD 650<\/li>\n
- Birdseye Mini 36mm V1.2 PDB<\/li>\n
- Micro MinimOSD<\/li>\n
- Lumenier GoPro QAV mount + GoPro Hero4 (took it down for some of the flights to reduce weight)<\/li>\n<\/ul>\n
![\"TheaBuild3\"](\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/02\/TheaBuild3-150x150.jpg\")
<\/a> ![\"TheaBuild2\"](\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/02\/TheaBuild2-150x150.jpg\")
<\/a> ![\"TheaBuild1\"](\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/02\/TheaBuild1-150x150.jpg\")
<\/a><\/p>\n![\"TheaBuild5\"](\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/02\/TheaBuild5-150x150.jpg\")
<\/a> ![\"TheaBuild4\"](\"http:\/\/jaisor.net\/wp-content\/uploads\/2016\/02\/TheaBuild4-300x199.jpg\")
<\/a><\/p>\n<\/p>\n
The Software, Tuning and Flight<\/h2>\n
BetaFlight 2.3.5<\/h3>\n
For a while I’ve been flashing\u00a0BetaFlight on my quads. On this one, I decided to use the latest 2.3.5. A quick\u00a0maiden flight showed the basics were ok, so I jumped into tuning. I mentioned above, my first flight controller choice was a Naze32 Rev6. I had no idea\u00a0about\u00a0the gyro noise issues at low looptime (Standard Betaflight has looptime of 1000). I noticed and heard oscillations right away. I spent\u00a0several hours trying to tune them out. In the end I had to re-enable and jack up all the filters and\u00a0reduce P and D to values that made the quad barely stable in flight. That is when I decided to\u00a0swap the Naze32 for an SPRF3 board, which solved the gyro issues right away.<\/p>\n
2Khz mode!<\/h3>\n
A wise man said “Anything worth doing is worth overdoing” so I decided\u00a0to push it a further enabling\u00a02KHz mode (500 looptime). There we no noticeable oscillations and the\u00a0quad flew great, but looking at the blackbox log, the gyro is definitely noisier. For curiosity, the 2Khz is turned on by disabling the gyroscope\u00a0low pass filter and with the D term filter already disabled as of 2.3.3, there really isn’t much filtering going on.<\/p>\n
I tried both 3S and 4S with 4045BN props (DAL and HQ). The quad flew tight and fast, but\u00a0after each 2-3 min flight sessions the motors felt quite warm. Not really hot, but definitely not comfortable, even on 3S with a more casual flight.<\/p>\n