Some nice flips and rolls there jhitesma!
So that's where my first view came from
For everyone who isn't following my youtube feed:
I really, wasn't really trying to show off or anything with it yet - just feeling out it's envelope and how it responds to various things at this point. When I got there I had the whole park to myself. But in the evening the light is horrible flying from the parking lot. So I had to walk way out into the field to try and get better light. I was almost at the far end when I did the first flight - then I broke that prop. While I was replacing the prop some people with dogs showed up. And while it's an on-leash only park I'm still nervous flying near dogs. So I cut my flying window in half. So by the time I really got going on flips I was in a smaller area
Then two people showed up to play Frisbee golf. So my flying area got even smaller. That was when I pulled out the quad. Which didn't go well:
That first crash was because it was responding REALLY odd in the air and heading towards the golfers - so I decided to just ditch it ASAP. Looked fine when I picked it up, but then armed the motors and half a prop flew off. Replaced the prop and then it wasn't responding to my TX. Took a closer look. The power wire to the RX had come loose. Even after I promised to put a drop of hot glue (I say epoxy in the vid but meant hot glue) on those last time this happened (at this same park.) So I've got a small wiring repair to make again.
Went to fly the hex again...and while I was getting it prepped my TX started beeping at me about a low battery. I just charged it 3 weeks ago and haven't flown much at all. It's also getting puffy. It's a LiFe and has been treated well and in turn treated me well. But right when I got it I had a small accident with a charging harness and as a result it's had one cell that never really balances well. Probably time to pickup a new battery.
I find the hex is absolutely elegant in the air. Those barrel rolls are beautiful to watch, particularly when you have forward momentum. I like how this copter cuts through the air too. It has enough ballast to handle some moderate breezes and enough power to fly against some wind.
Fully agreed. That first reverse barrel roll really caught my attention. But I just didn't have enough space to really feel safe doing many moves with momentum. I don't know how well it comes across in the audio but you can probably hear the wind blowing, it was a good 15mph with some decent gusts on top and the hex handled it great. That was what happened when I went to land in the truckbed. Not only had I not left enough room but a gust came up and spooked me so I aborted and did a ground landing instead
Definitely handles wind better than anything else I have though.
I have had mine out at the new field once now. I got it up to <> 75% throttle doing flips and rolls before I chickened out on the speed. I'll get the Mobius out this weekend when I go to the new field.
That one punchout was at about 75%. The problem I'm having is even when I try to give it full throttle I can't bring myself to just slam the stick - and it takes it a moment to "spool up" and start responding to the stick...then suddenly once it does it just takes off. It doesn't have the instant response that a quad does - but when it gets going it GETS GOING. It's more like driving a truck than a sports car - but still driving it like it's a sports car
That Brain with TAU on it seems to handle pretty well. I find the hex to be wide enough that it has some natural stability in rate mode. That with the ballast, makes it pretty easy to park the copter in one place or catch the copter coming out of a flip, spin or roll.
I really can't get over how locked in it feels just with the autotune. I have seldom had my MW (8 or 32 bit variants) setups this locked in - and it always took weeks of tweaking to get there. There is definitely a lot more natural stability than mini quads, and there's more than my similarly sized knuckle quad. This is actually slightly larger than my knuckle (and my knuckle is actually slightly larger than stock as I sized it for future experiments with 10" props.) The combination of extra size and 2 extra motors really makes it stable. You may notice in the videos that I actually look down at my TX a little even when flying in rate. I don't do that with any of my other multis as none of them feel stable enough for me to feel safe glancing away.
It does roll great, but I'm still only at 400 deg/s on my rate. If I get that up a bit higher it will to tighter quicker flips, but as you probably saw in the video with careful throttle modulation it can do some very precise flips already. The 35% expo I added in did help smooth it out without removing that edge - I can see it will be nice for FPV. But for LOS I preferred no expo even if it looked a little "sharp" in the sky.
My only real concern now is battery life. My 1300mAh 45-90C lipos don't last long and my 2200mAh 45-90 lipos are almost 3 years old and start to sag (on any of my copters) at about the 5 minute mark. My 1800mAh at 35 C is woefully underpowered (Mustang triggered a voltage alarm Sunday in under a minute of flight). I am thinking of getting some nice 65C 2200s so I can really crank it.
Both of the flights that made up that video were on the same Zippy 40C 2200 on one charge. The pack was reading 7.8v on each cell after resting a few minutes. Motors and ESC's were cool to the touch. Recharging the pack it sucked up 1400mah. That was pretty low throttle flying though. Still it looks like I should be able to easily get gentle 7-8 minute flights off my good 2200's. I doubt spirited flying would go much past 5 minutes - and I doubt I could keep it up for much more than 5 minutes anyway
I'm glad you flipped it, jhitesma. I think your FPV experience will be better for it. I hope this copter helps you explore some canyons in style.
Well, the FPV experience is going to be a bit delayed due to the flipping.
Though to be totally honest it wasn't the flips. It was just playing around with little throttle cuts and an accidental brush with the ground.
Need at least a new antenna and probably a new TX now. I was thinking about getting a different one anyway...I'm going to need 1.2/1.3 for where I hope to fly this eventually....