Hi finally was able to test my jDrones quad outdoors but I'm not sure everything is ok, but maybe, having never flew copter, this is the right behavior.

Behavior I noticed in the quad

First problem I've seen is that the quad drift quite a lot forward/left. If I don't touch any stick it move a lot to one side.

Also, after I take off it climbs, but then when I remove just enough throttle to stop the climb, it starts descending, and it feels like there is no sweet spot where it doesn't climb or descend.

Yaw on the other end works perfectly.

Another thing I noticed is that if I pitch or roll, the quad looses height and I have to correct with the throttle to keep it at more or less the same height: I would have expected it to just move, not also loose a lot of height.

I checked the frame and it looks ok, no obvious misaligned motor or arm. Only possible issue I found is that a motor doesn't oppose the same resistance when I turn it manually as the others, but not sure this is a issue.

Are these normal behaviors that I should learn to counterbalance or is there something wrong in my frame?

I've attached the log: if you have a look at it, you'll notice that I have a lot o roll/pitch even when not applying any stick.

Any advice will be appreciated.

Thx

Simone

2012-12-19 21-08 14.log

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • T3
    A lot depends on the wind. Keep in mind your copter will act like a balloon and get pushed around by the wind. Manual altitude hold never really holds even if it's dead calm. The flight mode ALT HOLD should hold within 1 meter. Again winds makes a big difference. Change yaw will cause a drop in altitude because the motors are changing speed to turn the copter and you loose a bit of lift. The programmers might be able to fix this in the code. Not to sure, the code is way over my head. Even when I fly waypoints and change yaw I've notice either a drop or up lift when the copter changes yaw. I recommend you fly in stabilize mode and get a real good feel for how your copter responds. Then try ALT HOLD. Remember if anything happens you need be able to fly in manual mode. I've had some really crazy flights and crashes. Almost every time I saved my copter I did it in stabilize mode with me flying.

    Good luck and Merry Christmas.
    Richard
This reply was deleted.

Activity

DIY Robocars via Twitter
18 hours ago
DIY Robocars via Twitter
RT @f1tenth: What can we learn from autonomous racing? Actually, a lot! To get an idea what you can do in this field and where the research…
Monday
DIY Robocars via Twitter
Monday
DIY Robocars via Twitter
RT @a1k0n: It's aliiiiiive! Less than a week until @selfracingcars and I'm just now digging this bad boy out. Been a crazy few months. Hope…
Monday
DIY Robocars via Twitter
RT @OttawaAVGroup: Mark your calendars. CAV Canada is happening on Dec. 2nd, 10am-4pm EST. And guess what - admission is FREE! Get your ti…
Oct 6
DIY Robocars via Twitter
RT @f1tenth: Our new 1:10 scale 3D racetrack is here. We will implement it in the @SVLSimulator in the next weeks so everybody can use it.…
Oct 6
DIY Robocars via Twitter
RT @DAVGtech: Received sweet autonomous Ferrari's that we plan to demo at the @IndyAChallenge on our portable @donkey_car track. Let us kno…
Oct 6
DIY Robocars via Twitter
Sep 30
DIY Robocars via Twitter
Sep 9
DIY Robocars via Twitter
RT @chr1sa: We've got another virtual @DIYRobocars race tomorrow at 9:00am PT. Two dozen autonomous cars will compete, four at a time. Ther…
Sep 4
DIY Robocars via Twitter
Sep 1
DIY Robocars via Twitter
Aug 31
DIY Robocars via Twitter
Aug 31
DIY Robocars via Twitter
RT @ExplorerRobocar: Sometimes, I am really a big kid!! Having fun with my virtual RC car on the @diyrobocars track 😜😉, by using the « AR R…
Aug 24
DIY Robocars via Twitter
RT @grepLeigh: @donkey_car @unity3d @TensorFlow ~1050 episodes into training, my agent learned to erratically drive in the left lane. 🤖😆 ht…
Aug 24
DIY Robocars via Twitter
RT @EclipseCyclone: Sweet! http://Robotec.ai high performance #ROS 2 @unity3d #CycloneDDS bridge for @AutowareFdn @SVLSimulator now…
Aug 24
More…