Sloth SX - X Class Octo

By sloth on Feb 16, 2021

37  1,027  18

Alright so I first did this mockup in early 2020, I'll leave the old frame renderings in there, but basically I took this quad to the X Class World Championship and won!
What you're seeing here now in the images is the 2021 version of my 2020 winning quad. The only difference I made has been really the frame. Trying to push it lighter and lighter.

Why Octo
Well I watched the Catalyst guys first put theirs together and tried to learn from them. No one else really runs this setup. There are good and bad points to it. First, she turns on a dime which is awesome, and second it much cheaper to build and repair. On the down side, it hits a speed barrier that will leave you behind on a big straight away for sure.

2021 Improvements
Basically I only changed the frame, reducing the number of bolts I needed to take apart to fix something, skinnier arms and my last upgrade will be connectors (My connectors melted off on my winning run). I would LOVE to find a lighter motor that can give me the same power, but everything seems heavier so I'm sticking with the iFlight combo for now. I think I blew 4 or 5 ESC's in 2020, none to smoke, they all died mysteriously. I can't say I'd recommend these iflight ESC's for the same money you can get APD, get the APD.

For props, the HQ's turned out to be super brittle. These MAS ones fit the bill perfect but I'd like to try some more in 2021.

This quad now sits at 1438g + batteries.

Alt Tag


Part List

Flight Controller

MATEKSYS F722-PX w/Pixel OSD Flight Controller (5 builds)


8 x 120F3[x] 12S 50V 120A


8 x XING X2814 FPV NextGen Motor (2 builds)


HQProp MQ 9x5x3 Macro Quad Prop (4 builds)

FPV Camera

Caddx Vista Digital HD System for DJI HD FPV (98 builds)


OCP 5.8 - TrueRC Canada (14 builds)


FrSky R9MM Long Range 915MHz RC Receiver - Get Yours Today! - RMRC (114 builds)

Power Distribution

APD - PDB500 - X 14S 60V 500A (2 builds)
See Site

Power Distribution

Matek XCLASS FCHUB 30x30 PDB 12S : 5V & 12V Output (3 builds)
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Mothmanfpv   Jan 02, 2022  

very nice I've spent about 8 hours researching on building the quietest drone possible at hovering and this is similar to what I was gonna design haha do you find this or the sx quieter at

MPHP   Apr 23, 2021  

Jesus mother Mary of Christ. I like

MINGA   Feb 27, 2021  

Love this build. Will I be able to buy the frame or a manual to build it? Would like to build a cheap x class.

sloth   Mar 01, 2021 

Sorry this frame won't be available for sale.

butcher51   Feb 23, 2021  

I tried this esc-s too and constantly die one, switched to tekko 32 65A, and they works perfectly since a year with no issue. Great clean build btw!

sloth   Feb 23, 2021 

Yep I've killed 4 or 5 of them without any visible issues. I've never seen one go up in flames or anything, they just stop working. Very dissapointing.

jolars   Feb 22, 2021  

Thats awesome! And honestly, much less expensive than a lot of rigs I have seen in this class. Using more small motors really saves a lot of $$ apparently.

techguy1623   Feb 21, 2021  

Crazy coo!

Keeph   Feb 21, 2021  

grats on winning world championship!!!
your Iflight xing motors, what kv are they? I have 8- 2814-880kv motors and wanted to try a x class running 12s. I'm new to x class, dont really care to race I like the bigass foot print of x class drones and want one, lmao. your will definately be my muse in designing mine.
great build, ,i love it...

sloth   Feb 21, 2021 


I'm running the 880kv on 8s if love to jump to the 1100kv but i think id also need to jump to some bigger ESCs

KaiZenDon   Feb 18, 2021  

Congrats winning World Champ!
How are the motors wired? eight signal wires or one signal wire per each pair of motors?

sloth   Feb 18, 2021 

Thanks! So I've actually tried both. I was running a Talon F7 feeding two motors with 1 signal and I switched to the Matek with a custom mapping. I don't think I noticed much difference. Maybe unrelated, I stopped blowing ESC's. But in terms of performance it felt about the same.

KaiZenDon   Feb 19, 2021 

Good to know it can work both ways! it gives us layman a chance to build one too!
I'm really tempted to design a 2" version....not sure if it would look cool or cute hahaha

Kstone   Feb 18, 2021  

Can it fly "if" it loses a motor?

sloth   Feb 18, 2021 

Yep! When I first tried the HQ props I shattered 4 on punch out. Also I've had ESC's fail mid flight and no issues flying and landing safely.

kwadkenstine   Feb 16, 2021  

Cool , when the parts come , i too will be adding 4 extra motors to the big stick

sloth   Feb 16, 2021 


phaley51   Feb 16, 2021  

Dear Santa...

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