Quad Crashing Issues

[RobG]

Hey, I'm a fairly new quad flier and have been having some issues over the past couple of days. Twice I have been flying and my quad has essentially dropped out of the sky.

Quad Specs:
DJI F450 frame
Naza V2
Devo7 transmitter + receiver it came with
DJI 920kv Motors
DJI 15A OPTO ESC
3s 5500mAh battery

Below I have posted videos of both crashes. The quad remains sort of upright while falling and the props are still spinning, yet when I upped the throttle the copter still wouldn't recover (however when the copter hit the roof on the first video I was able to recover AFTER the crash).

Any ideas what is going wrong? (i.e. some settings may be off, or am I being too rough on the controls...)

Thanks!

 

[John Doecliff]

Well it doesnt look like your props stopped or anything wierd like that. It doesnt even seem like they slowed down from the tone of the audio. Is it infrequent or all the time? does it fly ok normally and these are just 2 fluke incedents? Are your gains set too low? When it happens are you trying to back off on the throttle or hover?

 

[RobG]

This has only happened on both of these occasions, however I have only flown this thing about 9 times for ~15 minutes each flight. The gains don't seem to be low at all, normally it responds very promptly. The first time I was backing off of the throttle while pitching backwards, the second time I was only yawing. Another thing to note is that this has only happened while flying with the Gimbal/Landing gear, it has not happened when free flying without them.

Thanks for the reply!

 

[Long Range RC]

Ok, I have an answer. I had this problem with one of my raptor 50 helicopters. Some receivers go into a failsafe when a voltage drops to a certain level. If it goes into a failsafe and you don't have your failsafe idle set to a good hoover speed it could drop. That is one explanation. The other is that when using a naza v2 if you drop your stick down below 10 percent it will go into smart shut down which will cause it to drop but it will drop and still remain level. If you don't have your max idle set up it could go into this mode much earlier than 10 percent. To set you speed controllers to work correctly take your blades off and have the copter powered off. Turn your radio on and put the throttle stick to full throttle. plug your copter into power with the blades off and wait till you hear a quick beep from the controllers and or motors. immediately pull the throttle stick down to max throttle off and the controllers and or motors will beep again. Shot everything off and the put your blades back on. You should be good to go from there. Next time your flying and if it ever does this again you can quickly take control of your heli by switching the gps, atti, manual mode switch back and fourth quickly once and throttle up. If I ever have an issue with control I always revert to manual and I can usually pull out of most falls.

I hope this helps a little.