I know it's been a while guys, but we did the maiden flight! I actually maidened on my last day working full time for the company (which was Friday Aug 14, so I've been sitting on this footage for while).
Later today I'm planning on using the Pixhawk's autotune function to tune the PIDs, which should be rather exciting!
impressive. even tho the first thing i thought of when your boss took control of the Science AP FH machine... get the man a nano qx 60.00 BNF.. and practice in acro mode ( red led )for a day or two, then he would not be nervous.. or maybe he would be that is a monster.. and it sounds like a small heli taking off. heh.
im thinking 1 case of beer, ill be waiting for it to arrive on my front door.
would you post the specs again.. just frame size, motor/prop/FC. nothing to detailed.. it looks like its using yard sticks for props im guessing they are 18" or something silly like that.
it would be impressive to see in person that is for sure.. if you gonna go big, go big or go home
I can't believe you spun the props up the first time indoors, without the copter tethered in any way! Living on the edge! I've seen a mis-tuned PID loop take a copter to the moon the first time the throttle left zero. Not a big deal when it's a $300 mini quad weighing 550 grams, though.
Nice build and log! I do echo @joshuabardwell's observation about spinning up untethered. Those are some impressive gonads! I was a little more concerned about the FOD potential especially with those scissors below the prop blast.
Here's how I'd answer that. The worst-case scenario on a spinup is that something goes wonky on the PID controller and the motors all go to full. Or maybe the copter starts oscillating like crazy and shakes itself to pieces, while clattering all over the room in the process. So now ask yourself: if I throttle up and that happens, am I willing to accept the consequences? If the answer is no, then the copter should be restrained on first throttle up. If the copter is capable of seriously injuring you, seriously damaging something expensive in the room, or damaging itself to a point where you'd be upset to have to fix it, then it should be restrained on first throttle up.
With my mini quad, I always do a hand-held test after any configuration changes or after changing a prop where I throttle up and tip it forward, back, left, right, and feel that it pushes back correctly. I also feel for oscillations. I started doing this after once accidentally setting P gain to 25 (the max value) on Luxfloat, which resulted in the copter just taking off for the moon, oscillating wildly, the second the throttle left zero. I cut throttle and it fell from about 30 feet and landed on my Mobius and destroyed it. I mean, you think that if you just give it a little throttle, then you'll catch any bad tendencies and throttle back, but that's not what happened with my mini quad. There were two settings: to the moon, and off. And what if your brand new FC has a damaged gyro or something and does a flip of death?