Shendrones Squirt v2

By bootbox on May 22, 2019

28  3,491  28

I was browsing RotorBuilds one night and stumbled upon rtyler's insanely clean Squirt v2 build. I couldn't get it out of my head and knew I had to build one.

I copied Nurks PIDs from his blog and they work great. Based on a few things I had read I was prepared to have a bit of a hard time flying it in a cinematic way but it wasn't that bad. I definitely need to slow down my pans so the horizon doesn't tilt so much. I'm considering trying RealSteady GO for horizon lock, I just need to print a new GoPro mount that isolates from vibration better, as there are issues with the Hero7 and RealSteady if you have any vibrations reaching the camera.

The maiden flight video below was filmed at dusk last week so the lighting isn't the greatest. I've got some ND filters I'm excited to try out on a nice sunny day though, hopefully soon. I love this thing and can't wait to get more footage this summer.

I almost forgot - the TPU ducts. I have an Ender3 3D printer and it's pretty dialed in for TPU. I figured these ducts would be no problem at all to print and I'd save $55 vs buying the pre-printed ducts. Up until this project my TPU prints had all been pretty small - battery holders and canopies for whoops basically. These ducts are huge and even with retractions turned down as far as I could reasonably set them, I had 5 or 6 prints fail at about 90% (8 hours into printing) leaving me with a bunch of nearly finished ducts to throw away. I eventually tried a slightly harder TPU from Amazon - Priline Black in 98a shore hardness. It produced a perfect set of ducts on the first try. They are nice and soft but not so soft that they deform at the slightest touch. I also printed the GoPro mount and the antenna mount (designed by rtyler, see link below) in the same TPU and they came out great as well. The GoPro mount could probably stand to be printed at 99% for the Hero7 Black, it's a bit loose, forcing me to run a velcro strap around the camera.


Part List


Shen Drones Squirt V2 3" Cinewhoop Frame - Carbon & Hardware Only (Ducts Sold Separately) - Choose Your Version (17 builds)

Flight Controller

Airbot Omnibus F4 Nano V6 20x20 Flight Controller w/ LC Filter (57 builds)


Airbot Ori32 32Bit 25A 2-4S 20x20 4in1 ESC (82 builds)


4 x Lumenier RX1407 3200Kv Motor (5 builds)


HQ Prop 4x4.3x3 V1S Tri-Blade 4" Prop 4 Pack - Choose Your ColorOrange (31 builds)

FPV Camera

Foxeer Falkor 2 Micro FPV Camera - 1.8mm Lens - 1200TVL 16:9/4:3 PAL/NTSC G-WDR - Choose Your Color (74 builds)

FPV Transmitter

Team BlackSheep Unify Pro32 Nano 5.8GHz Video Transmitter (2 builds)


Lumenier Micro AXII 5.8GHz U.FL FPV Antenna - Choose Your PolarizationLHCP (59 builds)


Team BlackSheep Crossfire Nano SE Receiver


Tattu R-Line 14.8V 4S 850mAh 95C LiPo Micro Battery - XT30 (66 builds)


LATEST Jumper 2020 T16 PRO Type-C Charge and Folding Handle OPENTX Radio Transmitter PRIORITY US SHIPPING INCLUDED (24 builds)


DJI Digital FPV Goggles V2 - Ultra Low Latency 810p 144FPS Digital HD (163 builds)

Misc Parts

Ummagawd UMMAGRIP Universal Super Sticky Battery Pad (173 builds)

Misc Parts

Unify Pro Nano Mounting Board (Nano-Nano) (20 x 20) (8 builds)

Misc Parts

GoPro Hero 5/6/7 protector for shendrones squirt v2 by mg_earl
See Site

Misc Parts

Shendrones Squirt Antenna Mount for U.FL Micro AXII and Immortal-T v2 by mackhistory
See Site

Radio Module

Team BlackSheep Crossfire Micro TX Module (143 builds)

Battery Charger

HOBBYMATE Duo Lipo Charger Dual Charge Port, Fast Lipo Charger, AC/DC Balance Charger 12A 120-240W W/ AC Power
See Site

Soldering Iron

Weller WLC100 40-Watt Soldering Station (9 builds)


Moore Ideal Products 9512 Metric Speed Tip Set (4 builds)


DroneGuard BP 450 AW
Show stores (9)


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Bikke Vliegen FPV   Sep 28, 2020  

What's your flight time with 850 4s lipos? Did you try to go 11000 mah or 1300 mah?

bootbox   Sep 28, 2020 

I sold this but I used to get around 4min on an 850mah 4s. For what it's worth, if you're considering building a Squirt, if I were to build another one I'd use 1507 motors, the 1407s I used on this build were underpowered.

Bikke Vliegen FPV   Sep 28, 2020 

maybe because of the kv? I'mt thinking about FPV cycle 2203 3450kv (kebab) or xnova 1804 3500kv (lightning) or 1507 xing 3600 kv

O.B. Juan Kenobi   Aug 19, 2020  

Hi Bootbox, nice build. I just got an Ender 3 printer. What did you do to "dial in" your printer to make it better for TPU and also what type of filament were you using when your prints failed? Andy Shen highly recommends the SainSmart 95A filament, but he uses a different printer. Thanks for your information.

bootbox   Aug 19, 2020 

Hi, the biggest improvement for TPU printing on my Ender 3 was changing the stock extruder to a SeeMeCNC EZR Struder. There are also some Cura slicer changes you can make that will help a lot - Set all speeds (inner and outer walls, supports, top and bottom surfaces etc) to 20mm/sec. Turn off wall compensation, turn off any variable flow rate settings, basically you want the pressure in the bowden tube to always be the same. Turn on 'connect infill lines', set combing to 'all'. With regard to retraction, I did not change the settings at all from PLA (4.5mm @ 28mm/sec), and my TPU prints are beautiful with no stringing.

For what it's worth, the first time I crashed the quad in this post the TPU ducts were absolutely shredded to pieces by the props. I printed some PETG ducts and sold the whole setup. If I were to buy another cinewhoop today it would be something like the iFlight Bumblebee with the injection molded ducts and foam bumpers.

O.B. Juan Kenobi   Aug 19, 2020 

Wow, fast response. I know that the Andy Shen made the ducts soft and thin on purpose and said that they do get wrecked pretty easy. I bought my first set of ducts, but want to try and print my own, in the event of the crash.

bootbox   Aug 19, 2020 

Haha yeah I have my email tab open all day. Not a bad idea to have a spare set on hand. Be sure to disarm right away if you crash. When my ducts shredded they turned into TPU belts and got caught up in the motors and twisted/tightened around them immediately. If I hadn't disarmed when I did, it for sure would have burned out my ESC.

Tomahawk   Sep 17, 2019  

Nice build and lots of great photos. stands up to current state of the art. I'm just building one now and this helps a lot. good job! it will be a good addition to the cine-fleet.

bootbox   Sep 17, 2019 

Thanks! You're going to love it, these are really great for taking smooth footage.

TaterrsFPV   Jun 30, 2019  

Hey Bootbox I finished my Whoop but what wories me are the motors get hot I havent done anything but fly stock steetings

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TaterrsFPV   Jun 30, 2019 

I know these are quad blade but I jave switched them

bootbox   Jun 30, 2019 

How hot are they? Most people say as long as you can leave your fingers on them for 2 seconds without getting burned you're ok.

If they're seriously too hot to touch you may want to search around for filtering and PID tips for hot motors.

TaterrsFPV   Jun 30, 2019 

THanks yeah I have never had motors that felt like this before thats why I freaked. Ill do some more testing. I think Ill flash Nurks BF version and go from there. Thanks again Bootbox!!

TaterrsFPV   Jun 25, 2019  

Hey Bootbox I finished printing my ducts and was just wondering if this was your end result and thanks

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TaterrsFPV   Jun 25, 2019 

Thanks BTW for responding!!

bootbox   Jun 25, 2019 

No problem! Can't wait to see your build on here :D

TaterrsFPV   Jun 25, 2019 

Oh yeah:)

TaterrsFPV   Jun 21, 2019  

Hey Bootbox how are you liking your Shendrones Squirt V2. I just bought the frame, but will be printing my own parts. Also wanted to ask I see everyone is using 5mm hub motors and was thinking of going w/ Emax RS1408 1.5MM shaft so I would not have to cut props any thoughts on this and thanks sir.

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TaterrsFPV   Jun 21, 2019 

Yeah buddy of mine might be building one now lol. I have a 550 hexacopter I was using for aerial video, but this is whay smaller and cooler.

bootbox   Jun 21, 2019 

I was really suprised how locked in it flies. It's super stable even in acro mode. I think it has to do partly with the design and partly with Nurk's PIDs. He has the I-term pretty high and the D-terms relaxed. It wouldn't be a very good setting for a freestyle quad, it's really stiff. But it's perfect for the Squirt.

TaterrsFPV   Jun 21, 2019 

Im really super excited about this build and enjoyed your video. Look forward in tuning it. Id like to see what Plazma Tree says with those pids

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