Kilby
Active Member
Hey gang,
So I have a problem that I think I have figured out, but I wanted to run it past you guys and see what the verdict is.
On my x650 frame with the DJI WK-M, I have been running 10x4.7 apc props since I had it. It did ok, but I wanted to try out the 11x4.7 ones I had waiting on the sideline. All went well for the first couple of batteries, but then I started to get this very strange pulsing of the throttle. It almost seemed like someone was throwing my throttle up and down maybe 2x a second. At first I thought it was just one motor and suspected an ESC, but after test flights in the garage to study it, it's def all the motors together. It will jump straight up and down if controlled a little. It also only seems to start when the craft goes from a hover throttle rate to a climb. It was fine on spool up or if I got it up and in a hover, but not on a climb or take off.
At first I thought it might be in the DJI, so I went in and updated to the last firmware, reset all the settings to default and tried again... same problem.
I then swapped the 11x4.7 for the 10x4.7 and the problem was gone. It sounds to me like there is more power needed than my power harness can deliver once it's propped up to the 11's. I'm using the Avroto short shafts btw. Since I had my ESC's on the end of the arms, I had a lot of extra wire left over from the long motor leads. This is what I made the harness out of. I think the runs up the arms are ok, but when all those leads come together I ended up using more of the same wire instead of something larger. I'm thinking this is my weak point, the wire leading up to the distribution point where it splits and runs down the arms. Before jumping into the project of re-soldering all of that i wanted to ask a few of the fine folks on this board what they thought.
The only thing that makes we question this is the fact that it ran fine for a couple of batteries before this problem started.
Thanks for any input.
-Terry
So I have a problem that I think I have figured out, but I wanted to run it past you guys and see what the verdict is.
On my x650 frame with the DJI WK-M, I have been running 10x4.7 apc props since I had it. It did ok, but I wanted to try out the 11x4.7 ones I had waiting on the sideline. All went well for the first couple of batteries, but then I started to get this very strange pulsing of the throttle. It almost seemed like someone was throwing my throttle up and down maybe 2x a second. At first I thought it was just one motor and suspected an ESC, but after test flights in the garage to study it, it's def all the motors together. It will jump straight up and down if controlled a little. It also only seems to start when the craft goes from a hover throttle rate to a climb. It was fine on spool up or if I got it up and in a hover, but not on a climb or take off.
At first I thought it might be in the DJI, so I went in and updated to the last firmware, reset all the settings to default and tried again... same problem.
I then swapped the 11x4.7 for the 10x4.7 and the problem was gone. It sounds to me like there is more power needed than my power harness can deliver once it's propped up to the 11's. I'm using the Avroto short shafts btw. Since I had my ESC's on the end of the arms, I had a lot of extra wire left over from the long motor leads. This is what I made the harness out of. I think the runs up the arms are ok, but when all those leads come together I ended up using more of the same wire instead of something larger. I'm thinking this is my weak point, the wire leading up to the distribution point where it splits and runs down the arms. Before jumping into the project of re-soldering all of that i wanted to ask a few of the fine folks on this board what they thought.
The only thing that makes we question this is the fact that it ran fine for a couple of batteries before this problem started.
Thanks for any input.
-Terry
