I finally worked up the balls to fly the thing!
Im quite impressed that it actually flew and didnt just explode on the spot after arming the motors ;)

A little wobbly, but thats more me and the shaking than anything else.
Slight drifting, however I havent done the whole in flight leveling thing.

Firmware 2.2b2 Octa. Default PIDS.
So need to tune them! Any Octo guys have some pid suggestions? (What should I change?)
Im definitely looking for sluggish movement for taking photos/videos. I dont need any aerobatics.

As far as power goes, the whole time, i wasnt using more than a 1/4 throttle, even for lift off.
It did bob up and down a bit, thats also coz my TX throttle is a little stiff...

Yaw was perfect :)

All in all, it was a successful test flight! Especially since the last thing i built and flew was the
arducopter. Going from something that weighs 1.5kg with +-3kg of thrust.
To a MONSTER that weighs 4.7kgs with +-20kgs of thrust, is quite intimidating to say the least!

This is definitely a testiment to my engenuity, and most of all an absolutely SUPERB autopilot!

Next job, PID tuning!

Till then!


Views: 1050

Comment by Russell B. Sutton on January 18, 2012 at 1:31pm
Try lowering P_stab, then do the in flight tuning by holding the throttle stick in the arm position for 20 sec, then just let it hover, if it drifts or leans in one direction hold throttle stick in the disarm position for 15 sec and re level. Looks great Bud!

Comment by Adam Rivera on January 18, 2012 at 1:51pm

I agree with Russell. Lower your P_stab on both pitch and roll. I use around 2.8 for an octo that has a wider span than yours.

Comment by Gareth Rens on January 18, 2012 at 1:58pm

Will do :) Thanks guys!

Let you know how it goes tomorrow!

Comment by Ellison Chan on January 18, 2012 at 4:35pm

Nice.  It must be scary with all those ginsu blades spinning. ;-)

I like the wife, in the background, as the voice of reason, "Don't get too brave."

Comment by Anish on January 18, 2012 at 4:50pm

btw keen to know ur specs, esc,motor, props, frame, battery :)

Comment by bmarshall5253 on January 18, 2012 at 7:22pm

Great first flight, looks like you've started to tamed the monster. You should be able to lift a big payload!

What was that dangling from the copter and swinging back and forth? I could tell from the sound of the motors you were not using much power.

Comment by Gareth Rens on January 18, 2012 at 11:09pm

@Anish: Specs are here:


If you want frame dimensions, just shout :)

@Ellison: I managed to cut myself bleeding last night on one of the props. And all I did was walk past and bump my hand on in. Karlas always got some or other wise crack going ;)

@bmarshall: In theory should be able to lift 10kg. (perhaps a rocket launcher or paintball gun) >:)

The thing dangling was a lipo monitor. I had the tm1000 telemetry connected, so I just wanted to compare voltages between the two.


Comment by Karla Jean Fripp on January 18, 2012 at 11:27pm

@Ellison. Gareth has been building and stressing for the past month. I don't want him to crash it. Like all guys he gets overly enthusiastic and then something could go wrong. He always complains about my wise cracks. I'm female I can't help it. Nex time i'll leave the manual focus on :)

Who likes my Hen?

Comment by Duran - ALTI on January 18, 2012 at 11:36pm

Nice Gareth, congratz getting her in the air.

Mu suggestions, lower your P stab and you your rate a little, it works well for our octo, ive also assigned tune 1 on ch6, we we keep for changing the flight stab for smooth video or rigid photo work.

@ Carla, nice Hen ;)

A big thing Gareth, test it as much as you can, keep it simple and make sure it flies well and reliable, I've flow my big octo around 1400 times now without a single issue, it's all about reliability, especially if your going to flying near people. We just shot a rock show hovering over about 2000 people with live video feed going to the big screens on stage...

My tips:

Hard solder as much as you can, dont rely on connectors, even our signal and rc wires are soldered directly to AMP
ALWAYS check voltage, and on a big octo like this it drops before you reach 3.3, trust me, we've set ours alarms to 3.65v per cell

not sure what props your running, but get APC 12x3.8, the bets by far.

other than that enjoy! :)

Comment by Karla Jean Fripp on January 18, 2012 at 11:51pm

Thanks Duran :) How is the Photoduino Kit Duran?


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