"At least the user comments at HK told me that there is a heat problem with MinimOSD V0.1 powered by 12V.
Yes, I found mine (acquired from 3DR) to be suspiciously warm, but otherwise I wouldn't have addressed the issue, with probably…"
Curiously, the wiki about contra-rotating propellors mentions improved efficiency and increased noise. In practice the sound is different but the noise level is certainly not excessive, and while I'm pretty sure that the bottom props…"
"I had the same idea some time ago, and ultimately decided on an X8 coaxial configuration where the motors are all tilted 15 degs outwards. Another member here (Aerhead) has tried something similar before using a dual quad config.
It already flies…"
"Hmm. I had another problem today (motors responding incorrectly to yaw) and so I went back from 2.7.4-Beta to 2.7.3. When trying to apply my arming fix to the source code, I found that the bug wasn't there, and so must have been introduced…"
"They also didn't use the capabilities of 3D printers to create complex structures that cannot be practically otherwise. I mean, it should be possible to design and print an optimal trellis instead of the traditional solid rib and spar structure."
"I feel for you, and alas, your problem might be the same as mine, or then it might not. The saying 'the journey is the destination' certainly applies here.
And like I said: the bad news is that you will have to build the code yourself.…"
"The Good News: I've solved the issue.
Tracing with a logic analyser revealed the exact problem. Power is applied at A. When APM initilizes the rc channels, it activates the outputs and drives them high at B. PWM starts at C.
"Basically, I connected the scope to an output, set 500us/div, configured a falling edge repeating trigger and connected the battery (well, actually a bench lab ps). Once the APM2 starts generating output frames, the scope is triggered and starts…"
"I'm having the same problem. Originally standard octo firmware was loaded by latest version of the planner, and all 8 TGY Plush 25A escs armed. Rebuilt arducopter in Arduino with OCTA_QUAD_FRAME and now only 3 escs arm. With a scope I see at…"
"The current reliance on PID controllers without considering kinematics such as linear+angular momentum and acceleration, gyroscopic effects, motor thrust in a theoretical manner has it's limits. Multipilot32F4 / AutoQuad FC and ESC32 may…"
"FrSky also makes the Futaba FASST compatible TFR4B. This 4 channel full range rx is quite cheap, small and light and can output CPPM and RSI using the jumper method. It works like a charm with APM2 and my T8FG.
@Veikko: I don't know about the…"