This project has been a very interesting first foray into UAV design. I still need to get some ground-to-air footage of it flying but at least I got to test the nose mounted camera…
Foam Board UAV – The on-board footage
I think the general theme recently has been the ongoing windy weather so I won’t go into it again!
I had made a few modifications to the foam board UAV – adding some down-thrust to the motor and also moving the battery into the mid fuselage so I could remove a lot of nose weight. So, with a quick check of the controls I started recording and threw the model… straight into the ground!
Fortunately the damage was very minimal and I picked it up and chucked it again. Being a pusher motor the single hand-launch is a bit of a trial but in the end the takeoff was a lot smoother than some commercial UAV launches I’ve seen.
Flight observations
Obviously there is a little “jello” on the footage but I am putting this down to the fact that the GoPro mount had come loose slightly during the initial failed launch. Only another flight will confirm this.
I have noticed that the model “crabs” a lot in the wind. I think this is because of two things:
- There is a very short moment arm from wing to tail. This reduces the stabilising effect of the vertical component of the fins.
- The angle of the V-tail is actually quite shallow so the model may be lacking a little vertical tail area.
The only way to test this would be to replace the tail with a more acutely angled V-tail. This UAV might also benefit with a little bit of rudder/aileron mixing to coordinate the turns more.
Of course, flying it in something less than a gale might prove different results! On the subject of high-wind performance I was really pleased to see how stable the footage is.
Where to next?
The Hobbyking APM2.5 clone is now ready to go with full telemetry added. I have it working on both my Sony Vaio Ultrabook and my Google Nexus 7 tablet (mission planner and droid planner respectively).
Now we have achieved a solid flight performance I will begin retrofitting the autopilot ready for the first fully autonomous flight.
Watch this space!
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Log In to reply
Photoshop had done something weird to them and faded them out. I've just republished and they should be much better now. :-)
Log In to reply
Log In to reply