Moka Ayleon HD 5" Ultra Lightweight 4s - 250g AUW

By wrong17 on Dec 25, 2021

10  411  4

This is my first time building a Moka frame and so far, I am impressed. First, I like the color of the carbon fiber and the design is very simple and easy to work on. All the cuts are nice and clean, but the edges are bit too sharp for my taste. So, I soften them up a little bit with a file. To keep the weight low, I did not install any of the extra 3D printed parts that Moka designed on Thingiverse. But I have to say, the STL files for this frame are very attractive and easy to print. For example, I like how the arm guard wraps around the edge of the arms and does not act as a soft mount either. It also has a build in clip that secures itself to the arm very well.

Alt Tag I am kind of torn about this way the Caddx Vista sitting right above the FC because it makes the over height of the quad taller. I kind of wish the frame was a tad longer in the rear where I put the Vista directly behind the FC. If they moved the FC 5mm forward, you would get almost 30mm of space in the rear. So, if you extend it 5 more mm you will have more than enough space for the Caddx Vista. I hate to do this, but this quad is a direct competitor to 2fiddy that I build earlier this year. The main difference would be the motor configuration. I was not sure if I wanted to build another 6s 250g 5” quad or should I try an 4s. The main issue I had with the 2fiddy is trying to stay under 250g AUW because the battery would need to be super small. Where as an 4s build, it would be easier to have a larger capacity lipo and still be under 250g. The Ayleon quad originally was designed to use 23mm m2 standoffs, but I was cheap and only bought the frame kit without the hardward and used whatever I had on hand. I tried using a 20mm standoff, but it was too short for a digital build so, the only other option was to use 25mm. I could easily take down the 25mm to 23mm with a lathe, but I rather keep the extra 2mm because of the battery strap. Similar to the Carnage build, I sandwich the batter strap to the frame with the Caddx Vista and that would push the Vista down about 2mm.

As you can see in the image gallery, it has been raining and I have not had a chance to do a maiden flight. I did do a test hover in the garage to make sure it even flies.

PIDs/Rate/Filters

Alt Tag
This quad has a similar layout as the Ummagawd 2fiddy so I use that PID, Rate, and Filter setting similar to what Tommy suggested in his build video. Since I am using a 2004 motor with a higher KV rating 2910kv) than I would like, I had to setup a throttle limit in Betaflight to 80%. That would put the motor closer to a 2300kv. I notice when I had the throttle limit set to 85% is felt great with an 850mah 4s lipo but when I switched to a lighter 660mah or 720mah lipo it is getting a bit too sensitive on the throttle. I was kind of disappointed at that point and I thought it would not hurt to try reducing the throttle limit a little more. That 5% made a huge difference and it feels good when using both the lighter and heavy lipos.

Alt Tag
Here are the rates I am using, and everything else is pretty much default. The only changes are the slightly increased rates and added some EXPO. Notice that I did NOT set the throttle limits in the rates but in the PID Profiles.

Alt Tag
These are the filter setting. I do have BiDirectionalDSHOT turned on and the ESC set to 48khz. The final thing I did in betaflight is applied the HD presets (smoothed FF for HD cameras, strong low turn rate smoothness, low iterm relax to minimise bounce back):
set iterm_relax_cutoff = 10
set rc_smoothing_auto_smoothness = 20
set ff_interpolate_sp = AVERAGED_3
set ff_smooth_factor = 40
set ff_spike_limit = 55
set ff_boost = 0
set feedforward_transition = 40
set yaw_lowpass_hz = 70
set throttle_boost = 5
set throttle_boost_cutoff = 10
set dyn_lpf_dterm_curve_expo = 7
set gyro_rpm_notch_q = 800


Due to the weather, I had to keep all the test flights short. This was the last flight of the day with all the setting I mention above and GNB 660mah 4s Lipo. I was expecting to have a poor flight experience because of the light weight battery but it turned out well.

More info coming soon.....

Photos

Discussion

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Mr_Stripes   28 days ago  

What is flight time on 660mah

wrong17   25 days ago 
1

It all depends on how you fly but I am guessing about 3 - 4 minutes of flight time. I typically like flying with the 850mah lipo because I like the feel of it more. That is why I do not know what is the typically flight time I get with the 660mah lipo. I was hoping to fly a few pack to give you a better estimate but I have been busy, so I give you an update later.

Madcatmike3d   Dec 28, 2021  
1

That is a gorgeous frame.. That carbon weave is so cool looking!

Jodie Froster   Dec 26, 2021  
1

Love the symmetry and antenna/xt30-mount print!

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