PS: Here's the link to Airmaxx23's motor dampener model: http://www.thingiverse.com/thing:2097105

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Finished & tested the video part first, so i can figure out where to place the rest... it's gonna be tight.



LC-filter by rtfq, 3s balancer plug cut open on 1 side so i can grab 3 cells off 4s balancer plugs. Cord & glue.
Thick doublesided foam tape to fixate cam, and removed the cam's back plate (red stuff is plastidip spray).

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Not that it would make a difference, but it's probably the most centered gyro i had on a quad so far.




After cutting wires, i soldered everything outside of the frame:








Already had it together, only to notice i broke or shortened the 5V piece. But maintainability is ok.




And i also had this already prepared before:

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Didn't find any space for a beeper...




Friend is printing a cam mount, so will be few more grams then.

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Finished. Well, except for the cam mount. The mobius was simply taped on for now. And flying

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Looks good!

You'll love the way it flies. I have a very similar frame for 5" props - the EMax Nighthawk HX200. It's also a true X with a lowrider rear plate and the handling on it is just superb.

Looks great!
Out of curiosity, what kind of prop nuts are you using? (They are sharp looking) Did they come with the motors?

Low-ride-ahh

Thx yeah it felt pretty good already on first few flights, it's just that the 5545 props make the batteries sag that little bit more... maybe i just need better batteries eventually.

The alu prop nuts i think i got them from myrcmart (good price btw), they are somewhat medium profile, i think 4.5mm high.

So, those Tattu batteries don't like a huge current draw then?

I will be starting a new build soon with 2306 2400kv motors and they will be even more thirsty than your 2206 motors. If you find anything better, please let us know!

(28-Mar-2017, 08:58 AM)unseen Wrote: So, those Tattu batteries don't like a huge current draw then?

I only got the 45C version, and i got them cheap, meaning they probably were old and had quite a bit of shelf life before...

PS: friend tested the 95C racing edition last weekend and his quad went pretty good

I have one of the 4S 1550mA/h 75-150C Tattu batteries in anticipation of my new build, so I'll see how that performs. They're quite expensive here in Sweden though at $30 each.

A bit cut together from first 3 flights, mostly cruising over the place to get a feel for it. Only lowered P&D a bit, hardly adjusted anything else. Seems like with the lowered battery position it behaves even more neutral.

Looks smooth man! Great flying as usual Loved the "halfpipe" moves
I hit my first airgates yeaterday! and "hit" them a couple times too anyways my experience with toys has left me with what seems, a very small learning curve with really making my nox5r scream! But as for tuning I am a nervous noob :/
Ive been learning how/when to tune but I still havent changed anything but turning my yaw P and D down by 15% (worked great) Been nervous of making it fly bad as roll and pitch are more dramatic (flies great atm just some osci on hard hard acceleration and on hard descents) My ? Is how much is your "little bit" Or should I just quit being a baby about it and start changing some PIDs?

Hey thanks for the kind words about the "transition riding", i caught myself thinking about skateboarding again lol... how would one do a mc-twist with a quad, instead of a 540°? Would it be kind of a roll, or flip & 180°? Or a diagonal flip and something?

About the PID, as this is my 3rd quad using betaflight 3.0.1 i could somewhat estimate where i would have to go. As a first step i lower P&D ("little bit" means 3-5 points on P, 2-3 points on D) and the dterm weight slider (for sure below 1, in this case 0.8) usually just to be safe until i adjusted the filters, and also since i like a "softer" feel anyway. Then i do LOS yaw 360°s to adjust yaw (upped P from 70 to 72 and lowered yaw_accel_limit to 180 to reduce upwards jump).

My best advice on adjusting PID is to use the multiple profiles - always keep a profile that worked well enough, and adjust another profile to try out any changes compared to the first. If it turns out to be better, adjust the previous and keep the new one as "backup", so in case it turns out to be worse you can quickly go back to the other profile without having to adjust things in the field. Even if it's easy with an android phone & OTG cable & ez-gui, like QMF says "I'd rather be flying"

About your quad's oscillations, that's hard to tell. If it's only at the beginning of very quick acceleration, then it's probably simply propwash, just like when catching a straight descent, or when falling backwards and rev'ing up. Now i read some guys adjust (increase) I-term to fight propwash, but imho I-term has too strong effect on a quad's feel to be adjusted only for that... A lower P-term can make things smoother in this situation, but it can also be too low. Besides, hardware makes a much bigger difference here - the lighter the props and stronger/quicker the motors & escs, the less visible propwash will be when it happens. Will be interesting to see how well i can get it on this quad - props are heavier and escs are less "sharp" than the kiss24a on my smaller rage.

Best is, to fly around propwash For example, instead of descending straight flat, push the nose down before you throttle up.

PS: Here's the current diff that shows all changes from defaults (also as a "note to self" lol so i can go back here and check what i did). Already changed few things for next flight but in very small increments.

Thanks fftunes that actually fills the gaps in my research (for lack of better words)
I know the ins-n-outs of propwash as I started with a Syma X5C which would descend to the ground in not maneuvering out of it good times
The part id likee to really tune is the hard acceleration. @ mild forward pitch (cruising) then add pitch and hard throttle (a rolling start to a race kind of senario) Almost feels like a burnout and goes away as speed increases.
Ill definitely set up some profiles! Thanks for the tips mate!

Hey, just got reminded that in betaflight 3.1.x not all control channels are smoothed by default anymore, instead only roll&pitch are smoothed, yaw and throttle have hard rc command steps, maybe that plays into your oscillations? To enable full smoothing on all channels you would have to "set rc_interp_ch=rpyt" in CLI.

Other than that maybe a blackbox log could help.