Over the New Years holiday I was able to test out my FW550 with the new AC3.1.
Previously I was running I think 2.6 and had problems with it. This new 3.1 is soo much better than the previous FW. The alt hold, loiter, drift and RTL worked really well. I did have a couple of anomalies though.
The RTL was fantastic. It would consistently land within inches of its takeoff point.
However, first interesting thing. I made quite a few flights and executed the RTL just for fun. At one point the battery had run low and it went into the RTL routine on its own. However, on subsequent flights, it would not initiate RTL upon low battery. The only thing that I know was different was that the first time it happened (initiated RTL) I had a 4s 5000 battery on board. The other flight where it wouldn’t go to RTL on its own I was running a 3s 5000 battery. I was using an external voltage annunciator and it was sqealing but the copter didn’t RTL. The last flight it was a ways out and it started descending. I tried to recover in stabilize mode but it kept descending. I switched to RTL and it just kept descending until it hit the ground. It popped the landing gear and brushless gimbal off the frame.
At another time while flying in Alt Hold mode abt 6 feet above ground. As I flew it away from me it started to descend. I let it go to see if it would recover. I finally stopped it when it was abt a foot off the ground.
The last little bug was after several flights I landed, put in a new battery and took off. It would start to twitch like it was trying to bank to the right. It would do this several times then stop. It was in stabilize mode at the time.
Has anyone else seen these little things?
All in all it is a lot better than it used to be. Thanks to the Devs for all of their work. I was ready to scrap the APM for a KK2.1 board. Now I’ll keep the APM.