Free250

By N00bly on Mar 21, 2019

2  165  2

They say the HSKRC Freestyle 250 is a clone of a more well known pilot designer frame. I really wouldn't know since I only own this one. The low-profile styling most likely was inspired (read copied) by the original, but the assembly and construction differs.

I made a few different design choices during the build:

  • ESC Placement - I routed the motor wires and ESC below the arm. It saves the ESC and wires from prop hits. I also wanted the ESC LEDs to be viewable from the underside i.e. when the quad is "going", instead of "coming".
    Alt Tag
    Alt Tag

  • Lipo Orientation - The lipo battery strap slots were positioned across the body, so I went with it. I feel like it gives me slower, but more stable rolls.
    Alt Tag

I definitely recommend an AIO for this frame. A double board 30x30 stack is possible, but it would not leave room for much else. Even with the single FC layer, I had to position the VTX in the tail section. The receiver and and 12V regulator are a snug fit under the inverted FC. For SmartPort telemetry, the Flip32 requires a BAT54 Schottky diode across the one of the inverted UARTs. Fortunately, these diodes are cheap and readily available on eBay. ReadytoFlyQuads.com provides a diagram on where to install the diode.

The XSR-M antenna placement was inspired by Whiffles, of course.

I'm still in search of a 3D printing service with teal TPU, for matching, of course!

Photos

Part List

Frame

HSKRC Freestyle 250 248mm Carbon Fiber True X RC Drone FPV Racing Frame Kit 118g (4 builds)
Banggood.com
$30.99

Flight Controller

Flip32 OMNIBUS F4 Pro Corner (4 builds)
Readytoflyquads.com
$38.99

ESCs

2 x 35A Brushless ESC, Rcharlance BLHeli_S 32 Bit 35A 2-5S Electronic Speed Controller Built-in LED Support Dshot150/300/600/1200 On
Amazon.com
$45.98

Motors

4 x DYS Samguk Series Wu 2206 2400KV 2700KV 3-4S Brushless Motor CW for RC Drone FPV Racing (25 builds)
Banggood.com
$39.96

Propellers

HQ Prop 5x4.3x3 V1S Tri-Blade 5" Prop 4 Pack - Choose Your ColorBlue (343 builds)
Racedayquads.com
$3.69

FPV Camera

Caddx Turbo S1 1/3 CCD 600TVL IR Blocked FPV Camera Yellow/Green NTSC/PAL DC 5V-40V Wide Voltage (4 builds)
Banggood.com
$27.13

FPV Transmitter

AKK X2(Smart audio ) (26 builds)
Akktek.com
$16.99

Antenna

Spedix Pagoda 5.8GHz SMA Antenna - RHCP or LHCP (27 builds)
Racedayquads.com
$5.99

Receiver

FrSky XSR-M D16 Telemetry Receiver (20X20mm, 16 Channel SBUS / CPPM) (2 builds)
Getfpv.com
$19.99

Batteries

Indestructible Quads "Black Label" 4S True 80C Racing LiPo 1300mAh/1500mAh Battery V2 (34 builds)
Indestructiblequads.com
$16.00

Power Distribution

Matek 12v Linear Regulator for 4S Quadcopter Setups - in line voltage step do...
Ebay.com
$2.99

Radio

FrSky ACCST Taranis Q X7 2.4GHz 16CH Mode 2 Transmitter Blue Orange for RC FPV Racing Drone (174 builds)
Banggood.com
$115.00

Goggles

Aomway Commander V1S FPV Goggles - Gloss Black (30 builds)
Racedayquads.com
$279.99

HD Camera

GoPro Session (53 builds)
Getfpv.com
$149.99

Misc Parts

Universal GoPro Session Sleeve Case Mount Tpu Lipo Strap Qav Alien Reverb Skitzo
Ebay.com
$10.00

Battery Charger

ISDT SC-608 150W 8A MINI Smart LCD Battery Balance Charger AU Warehouse (6 builds)
Banggood.com
$54.27

Soldering Iron

YIHUA 908+ 220V 60W Electric Iron Soldering Station Welding Rework with Soldering Stand + Cleaning Ball + 5 Tips
Banggood.com
$46.61
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Discussion

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Jodie Froster   Mar 22, 2019  
1

I love that you got the LED's on your ESC's to point down, that looks aweseome in flight. I know ppl talk a lot about frame cloning, but it's not worth an extra $70-80 for the same frame. If the designers didn't try to gouge us on the prices, there wouldn't be a clone of every frame.... So that's on them. I dig that you went for the toilet tank battery orientation, how is that working out? Also: with your motor wires run through the crash absorbent structure added to the end of the arms, have you lost any motors/ESC's in crashes?

N00bly   Mar 22, 2019 

Thanks for the feedback!
Toilet tank battery orientation....haven't heard that one, but I like it! So far, I haven't seen the need to change it, so I guess it's working out. No major crashes or repairs yet. The motor wires definitely look like they're hanging out there, all exposed. I probably could have cleaned that up with shrink wrap to bundle them together.

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