From looking at your video it sure looks like your gain is too high. You can see the rapid twitching. I would recommend you take it down 10 points in AL and try that. I generally have the gain settings for AL and ML set the same. If the gain is too too low my hell looks and feels "wobbly" if it's too high it looks "twitchy." Not sure what others have experienced, but on average, I have had my helicopter mysteriously drop out of the sky about once every 300 flights. I've had it happen with MK and Hoverfly. I am confident it has never been a low battery that caused these mishaps. On one occasion I think I flew too far away and lost signal and on one occasion a wire likely came loose, but the others are unknown causes in my mind. I'm sure not happy about it, but I have not been able to eliminate it. As a result, I would never fly over people or roads and I am far less interested in carrying expensive cameras than previously. Good Luck!
Hoverfly Crash - Need help figuring out why
- Thread starter eddarack
- Start date
JZSlenker
Yeah, I can blow that up.
Ed, i agree your gain looks too high. A word of caution. Don't put much credence in others gain values. Just because someone has a particular value doesn't mean that your MR will work well with that number. A high value isn't bad or good, just like a low value isn't bad or good. The gain is merely a value placed on the system to quantify it for that particular craft. Each craft is different and will have a different ideal gain value. I adjust my gain depending on flight conditions. Windy vs calm conditions benefit from a gain tweak. Increase your gain slowly until you have oscillations (which you have at the current value) then start slowly lowering the gain from there. When you find a gain that flys well and sounds good in manual mode, copy that value to AL. Then turn AL on, adjust your trims, land with AL on. Un-Arm. Turn AL off. Disconnect your flight battery. When you turn the power back on you will be ready to go. (Do not Change the Trims Back!)
Thank you all very much. I've adjusted my gains down and read the notes on 4.8. Everything is back together; just waiting on two prop adapters to get it in the air again. One thing I noticed on the notes is that I need to wait until the GPS is solid green before arming. I did not do this. I armed when it was flashing purple, and then I saw the GPS light go green, and then I tried activating position hold once in flight. Might this have something to do with the crash?
Best,
Ed
Best,
Ed
Bartman
Welcome to MultiRotorForums.com!!
regarding Hoverfly gains.....the old method was to tune to remove wobbles and to match manual vs. auto-level gains to get optimum performance and to eliminate the dreaded twitch when switching between modes.
with 4.8, it possible to have no wobbles at all at the gain starting values of 25 and -25. in this case it's a challenge to see a twitch let alone tune any twitches out. to see a twitch it's a good practice to hover near a fixed obect, i like to hover near the ridgeline of my house's roof as it lets me reference level and see any subtle twitches more easily.
a good thing to look for when tuning though is any surge in the motors when applying large throttle changes or abrupt attitude changes. if the motors sound like they're over-caffeinated and over-responding then the numbers need to be worked a little to settle things down. At the same time, if there were any little twitches remaining, they should also be worked out as a result of tuning out surging motors.
so, hover in a fixed spot and slam the throttle forward for a couple of seconds. if the heli responds with growling overaggressive sounds then tuning is required. if you slam the pitch or roll over from level and the motors surge and overrespond, tuing is necessary.
hope that helps.
bart
with 4.8, it possible to have no wobbles at all at the gain starting values of 25 and -25. in this case it's a challenge to see a twitch let alone tune any twitches out. to see a twitch it's a good practice to hover near a fixed obect, i like to hover near the ridgeline of my house's roof as it lets me reference level and see any subtle twitches more easily.
a good thing to look for when tuning though is any surge in the motors when applying large throttle changes or abrupt attitude changes. if the motors sound like they're over-caffeinated and over-responding then the numbers need to be worked a little to settle things down. At the same time, if there were any little twitches remaining, they should also be worked out as a result of tuning out surging motors.
so, hover in a fixed spot and slam the throttle forward for a couple of seconds. if the heli responds with growling overaggressive sounds then tuning is required. if you slam the pitch or roll over from level and the motors surge and overrespond, tuing is necessary.
hope that helps.
bart