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David Long's Discussions
Motor and ESC Selection and Scaling Up
Started Jun 9, 2012 0 Replies 0 Likes
I have been told that some motors and ESCs are more suited to multirotor applications than others. Heat dispersion and pulse patterns were vaguely mentioned. Can anyone speak to this?How were the…Continue
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David Long replied to Majid Khan's discussion Help needed regarding arducopter crashes"After testing and re-examining the 3DR PDB wiring...
In hindsight it's obvious... at least one of the red (middle, power) wires from the BEC needs to remain connected to power the ArduPilot. This is how the 3DR PDB are designed,…"
David Long replied to Majid Khan's discussion Help needed regarding arducopter crashes"I am also suspecting the BECs are the problem. Here's my reasoning:
RedPalm's log does seem to show the ArduPilot was giving the right signals. Unless the motor failed, the BEC cutting the power to the motor is the most likely…"
David Long replied to Majid Khan's discussion Help needed regarding arducopter crashes"I should add that I've been flying ArduPilot aircraft (multi-rotors and planes) for about three years now and this is the first time I've encountered this problem. Because of this, I'm more than a little inclined to think…"
David Long replied to Majid Khan's discussion Help needed regarding arducopter crashes"Hi Majid,
I'm having a similar problem and am trying to get to the bottom of it by comparing your configuration with mine.
BTW, I admire the foam cushion design.
Can you share a little more of your thinking on why you reduced the RATE_PIT_P…"
David Long posted a discussionMotor and ESC Selection and Scaling Up
I have been told that some motors and ESCs are more suited to multirotor applications than others. Heat dispersion and pulse patterns were vaguely mentioned. Can anyone speak to this?How were the motors and ESCs used on the 3D Robotics kits selected?My purpose in asking... I plan to build a multirotor with much larger motors than the ones I'm using now.In other large model aircraft, I used Hacker and Omega motors with Castle Creations ESCs. But I'm concerned they might be inappropriate in…See More
David Long posted a status"Are the ArduPlane and ArduCopter Manuals undergoing maintenance? I'm getting http 500 errors when I try to access them."
David Long replied to Steve's discussion Servo vs Nav PID Gain Tuning?"I believe I have read the Manual thoroughly and have not found a complete key to the parameters. So, I have experimented and parsed the code to learn their effects. I also have not found a detailed key to the log files. I figured…"
David Long posted a status"Xbee question... I flew Tuesday and telemetry worked great. Today, with no changes, won't connect. Anyone else experienced this? Ideas?"
Warren Eather left a comment for David Long"I'm new to the RC world but have worked in military and health electronics for 25 years."
David Long commented on Chris Anderson's group ArduPlane User Group"I bought a Castle BEC a few months ago and I've been staring at it :) wondering: Is the BEC necessary because the ESC is designed poorly? Why doesn't someone make an ESC that isolates the motor pulse circuit from the BEC?"
David Long commented on Chris Anderson's group ArduPlane User Group"I really am of a mixed on this. On the one hand, the amount of current that the ESC must supply to run the servos, APM, Rx, and Xbee is trivial compared to the motor's draw. (This points to quality, not quantity.) But the fact…"
David Long commented on Chris Anderson's group ArduPlane User Group"Warren... Yep, the Xbee is on there too."
David Long commented on Chris Anderson's group ArduPlane User Group"Warren, I agree with you on the quality of the current being the big factor. However, capacity comes to mind... when I removed the aileron servos (which together have leads about a meter long) and attached a single…"
David Long commented on Chris Anderson's group ArduPlane User Group"I realized something that I should have picked up sooner: When you install an APM in a model plane that calls for, say, a 30 amp ESC, you may need to increase the size of the ESC. I was recently getting some strange bugs (servos moving…"
David Long posted a status"Interesting link - quads working together to build things: http://ning.it/v80xCg"
Profile Information
- About Me:
- Love planes, trains, and automobiles.
- Tell us a bit about your UAV interest
- Been flying model planes for 40 years. Started with line control, moved onto R/C, and started experimenting with telemetry about 5 years ago. My sons and I have flown competitively and won a purse or two. UAV could make us even faster.
- Hometown:
- San Jose
Comment Wall (1 comment)
- At 7:40pm on December 1, 2011, Warren Eather said…
- I'm new to the RC world but have worked in military and health electronics for 25 years.
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Season Two of the Trust Time Trial (T3) Contest has now begun. The fourth round is an accuracy round for multicopters, which requires contestants to fly a cube. The deadline is April 14th.A list of all T3 contests is here.
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