SubSonic

By Pie on Dec 03, 2021

5  323  1

First Build!

Went pretty well, no magic smoke here.
Currently cruising around like a charm, can't speak for tunes, pids, or general feel as im just a beginner myself!
Planning on updating T-lite to edge TX, and quad to 4.3 and eLRS when that arrives.

Parts:

  • Frame: Brilliant. Build well, thick lower plate w/metal for rear antenna and front camera. Plus their lifetime warranty is gonna be great for when I inevitable wreck it in a crash.
  • FC/ESC: Great hardware. Lacklustre documentation. The plugs for the ESC and Vista are super handy, no need to fiddle with more small wires than you need. The wiring diagram itself is.... acceptable. Nothing great, but not incomprehensible either. I don't regret getting it, but if there's something better available, grab that.
  • Motors: Oh man. These things are beasts. I'm hovering around 20% throttle, which is quite mad personally. Huge amounts of lift, and not even warm by the end. Would recommend.
    I also managed to break one however, all four of my motor screws fell out, leading to the copper wires pulling out from the coils themselves. I've ordered some replacement T-motor 1204 5000kvs, and some rcINpower 1204/5000kv, which are identical except for the branding.
    The Armattan ones appear not be up for restocking, so worth looking into the rcINpower ones for exact matches, or the T-motor ones.
  • Props: I've ordered a bunch of different props for testing, but first flights with these windancers, yup. They are props. Great speed and lift, cornering seems pretty nice. Getting a bunch of prop wash on descents, however. But maybe that's just my flight style.
  • Video: So this is definitely the real deal. After playing with a few analogues, it's mad how much more you can see with HD. It's truly like looking through a GoPro. The wiring was a bit finicky on the vista itself, and fitting it into this frame seemed to be a bit of a challenge, I had to spin it 180 to get all the cable to fit without crushing them. The rear antenna mount is also very close, meaning I had to run the antenna cable front to back. Not exactly ideal I think. Be mindful when taking off also, as the vista lags for a brief time when switching out from standby/overheat to running mode.
  • Receiver: eLRS is a dream. ExpressLRS is akin to HD for your RX. Binding is super easy, simply set the same phrase on both TX and RX and you're good to go. Updating is easy, just hook up to its wifi and flash, easy as pie. Its constantly getting updated with new features, recently (2.0) it got dynamic power, helping to mitigate TX heat issues. Its got mucher faster polling rates, so feeling better already for flight, plus low latency. Not to mention its insane range and signal strength. You'd think the tiny (thumbnail sized) EP2 would be a poor purchase, but so far, not a single problem.
    Preivously i was using an R-XSR. Fits in the frame okay, had to route the antennas back to front, and down the sides, rather than down the arms themselves. Binding was a pain, with all the conflicting info online about ACCST vs ACCESS, etc. For the record it is bindable with a T-lite, you just need to be in FrSkyX2 D16 mode.

Personally, i am sticking ELRS for all future builds. Its just so easy, up to date, and the best for the job.

  • Batteries: Tried a 350 3S initially, fairly zippy but low flight times. 550 4S seems to be working perfectly. Great throttle response, and reasonable flight times too, plus quick(ish) to charge. Paired with Betaflights VBAT_SAG compensation, you can at least cruise around for a good five minutes. (I think)

Build notes:
Personally, I think this is a great pairing of parts, and makes for a good little beginner build with not too much difficulty in construction and setup.
The cap that comes with the FC/ESC is quite large and difficult to fit inside the frame. Next time i'm gonna mount that out on the pigtail.
I had to spin both the FC/ESC and Vista 180 to get them to fit in the frame better, thus the front-mounted pigtail.
Also meant I had to manually rearrange motors in Blheli32suite.
Using USB-C for everything is very convenient I must say.
The rear antenna mount is also a touch loose and doesn't always hold the connector in place. I used some hot glue to just kinda stick it in there.
The front stack screws are a bit long, even the shorter ones and they are metal. So just be careful when getting that mounted.
By default, the R-XSR comes with 2 sets of plugs, a 3-wire and an everything-wire.
You'll need to swap the 3-wire a little bit, as by default it goes - + SMARTPORT. I moved the smartport cable to SBUS so that I didn't have to use the everything-cable. - + SMARTPORT empty > - + empty SBUS
You'll need a small (1.5mm maybe?) Allen key for most of this build, maybe some small pliers/tweezers, wire snips, and a soldering iron.
Make sure you get an XT30 to XT60 adapter for your charger.
Don't wire the DJI controller wires that come with the FC/ESC unless you have a DJI controller
Careful of long wires, I've had to stick mine together to reduce prop strikes. Next time I'll be making them all shorter.
Apologies for the lack of photos, first time doing this lol.

Photos

Part List

Frame

Tadpole HD (3 builds)
Armattanquads.com
$45.00

Flight Controller

SucceX-D Mini F7 TwinG Stack (Mini F7+45A ESC) (2 builds)
Shop.iflight-rc.com
$130.99

Motors

4 x 4x Armattan 1204/5000kv Motors (2 builds)
Armattanquads.com
$203.00

Propellers

Gemfan WinDancer 3028 Tri-Blade 3" Prop 4 Pack (5mm/1.5mm Mounting) - Choose Your ColorWhisky (9 builds)
Racedayquads.com
$2.69

FPV Transmitter

Caddx Nebula Pro Micro Vista Kit - Choose Color (11 builds)
Racedayquads.com
$165.00

Receiver

FrSky R-XSR 2.4GHz Micro ReceiverDefault Title (929 builds)
Racedayquads.com
$21.99

Receiver

Happymodel 2.4g ExpressLRS EP2 RX Receiver module (67 builds)
Pyrodrone.com
$13.49

Batteries

Gaoneng GNB 14.8V 550mAH 80C/160C 4S Lipo Battery with XT30 Plug For RC FPV Racing (2 builds)
Banggood.com
$22.99

Radio

Jumper T-Lite 16CH Hall Sensor Gimbals CC2500/JP4IN1 Multi-protocol RF System OpenTX Mode2 Transmitter Support Jumper 915 R900/C (21 builds)
Banggood.com
$69.99

Goggles

DJI FPV Goggles HD Digital 5.8Ghz 1440*810 720p/120fps Low Latency with DVR Compatible With Caddx Vista for FPV Racing Drone RC (125 builds)
Banggood.com
$534.29

Video Receiver

Eachine PRO58 RX Diversity 40CH 5.8G OLED SCAN VRX FPV Receiver for FatShark Goggles (37 builds)
Banggood.com
$34.97

Radio Module

Happymodel ExpressLRS 2.4GHz Slim ES24TX-Lite TX Module (Jumper T-Lite) (2 builds)
Getfpv.com
$36.99

Battery Charger

ISDT Q6 Nano BattGo 200W 8A Lipo Battery Charger Colorful Pocket for 1-6S Lipo Battery (4 builds)
Banggood.com
$32.99

Tools

Ethix Prop Tool - KiwiQuads (2 builds)
Kiwiquads.co.nz
$25.99

Accessories

Menace Digital HD Antenna Pack (DigiPack) DJI FPV - Quad Junkie
Quadjunkie.co.nz
$69.00

Accessories

BDI DJI Digidapter Plug & Play Analog Adapter for The DJI Digital FPV System
Newbeedrone.com
$59.99

Accessories

HGLRC Lipo Battery Balance Charger Board Pro 40A XT60 XT30 Plug 2-6S Integrated with Lipo Discharger for IMAX B6 ISDT Q6 Nano HO
Banggood.com
$29.99

Accessories

CellMeter-7 Battery Capacity Checker Tester LiPo LiFe Li-ion NiMH NiCd (2 builds)
Banggood.com
$11.99

Misc Supplies

GNB Battery 11.1V 120C 1550mAh 3S - KiwiQuads
Kiwiquads.co.nz
$34.99

Misc Supplies

Ethix Goggle Strap HD Black Logo - Quad Junkie
Quadjunkie.co.nz
$27.90
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Discussion

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benjo   2 days ago  

Nice build! Are you running BF4.1 or better? Do you recommend a filter or PIS preset? I'm running a similar build and I love it but I'm getting a little bit of wobble on the hard turns.

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