I use a Flip 1.5 controller on my quad. After building it, of the first thing I decided I had to do was set up failsafe. I was afraid of my Turnigy 9x radio failing or losing signal and it just flying away. So enabled the failsafe so if it lost signal, 3 seconds later it would set the motors to "minimum throttle" plus 200 for 20 seconds then shut off. I tested this with no props on and it seemed to work fine.
On my first day to fly it after configuring the failsafe, I landed the quad and, for a reason I don't remember now, I turned off the transmitter and set it down. I had forgotten to disarm. Three seconds later, the motors spun up and I learned that "minimum throttle + 200" was enough to not make the quad come down easy, but to go UP. And at a nice pace too. In my newbie panic, unfamiliar with the transmitter, I fumbled with it to get it back in my hand, fumbled to turn it back on, fumbled with it to try to clear the "switch error" that plagues the Turnigy 9x if all the switches aren't in the proper position when you turn it on. At some point, I realized my fight with the transmitter was pointless and I just watched the quad as it flew higher into the air, drifting from the grassy area I was in to move over a parking lot, cut power to the motors, then gracefully roll upside down as it fell back to earth to slam onto the parking lot pavement.
With a sickening feeling, I went to retrieve it, just glad it hadn't landed on a car or hit somebody. Fortunately, damage was minimal. Some broken zip ties, a bent motor mount, and a couple dinged up propeller nuts. I had to recalibrate an ESC (I thought I had damaged it until I tried recalibrating on a whim and it worked again), but that was about it!
I disabled failsafe.
On my first day to fly it after configuring the failsafe, I landed the quad and, for a reason I don't remember now, I turned off the transmitter and set it down. I had forgotten to disarm. Three seconds later, the motors spun up and I learned that "minimum throttle + 200" was enough to not make the quad come down easy, but to go UP. And at a nice pace too. In my newbie panic, unfamiliar with the transmitter, I fumbled with it to get it back in my hand, fumbled to turn it back on, fumbled with it to try to clear the "switch error" that plagues the Turnigy 9x if all the switches aren't in the proper position when you turn it on. At some point, I realized my fight with the transmitter was pointless and I just watched the quad as it flew higher into the air, drifting from the grassy area I was in to move over a parking lot, cut power to the motors, then gracefully roll upside down as it fell back to earth to slam onto the parking lot pavement.
With a sickening feeling, I went to retrieve it, just glad it hadn't landed on a car or hit somebody. Fortunately, damage was minimal. Some broken zip ties, a bent motor mount, and a couple dinged up propeller nuts. I had to recalibrate an ESC (I thought I had damaged it until I tried recalibrating on a whim and it worked again), but that was about it!
I disabled failsafe.
