Kittyhawk 140mm 3" FPV

By dadougler on Sep 01, 2019

3  658  3

I wanted to see if I could build a quad using only parts from Amazon Prime. I wanted to make the quad under 250 grams but using larger motors than 11xx. This was my attempt. I think the weakest part here is the frame at $22 but I wanted a "traditional" looking quad. I haven't built a quad yet but these parts are on the way. Let me know how I screwed up or where I could have done better. Checked these same parts but from banggood and I would save about $60 if I was patient. Yikes! With the 850mah 4s I got about 220g AUW.

Post Build Notes:
I built went as good as you could expect for a first time. While messing with mounting the antenna I tried to unplug the MMCX connector and it jerked all the wires and pulled the pad off the vtx feed from the flight controller. I decided to bypass the FC OSD and just put the video from the cam directly into the vTX. Works ok, but I am going to replace the FC at some point. I didn't connect the rx telemetry correctly. I should have used the uninverted pads from my rx. I still need to weight this and see if it's under 250g.

Maiden Flight Video here:

Part List

Frame

Usmile GX140 140mm Drone Frame Designed for Rumcam Split Mini 2 Caddx Turtle V2 1080P HD FPV Camera Micro 3 inch Quadcopter Fram (2 builds)
Amazon.com
$23.79

Flight Controller

HGLRC F428 Fly Tower F4.V2 Flight Controller 28A 2S 3S 4S Blheli_S 4 in 1 ESC Betaflight for RC Racing Drone FPV Quadcopter Heli
Amazon.com
$68.99

Motors

HGLRC 4PCS 1407 3600KV 3S 4S Brushless Motor DIY for FPV Racing Drone Quadcopter Motor (3 builds)
Amazon.com
$1.00

Propellers

Gemfan 3 Inch 3 Blade Props 3052, 4 Pairs 3" Drone Propellers Designed for for Mini Straight Racing Tracks, Suitable for 13
Amazon.com
$7.98

FPV Camera

RunCam FPV Camera Phoenix Oscar Edition 1000tvl Super 120dB WDR 2.5mm Lens Mini FPV Camera Support OSD FC Control PAL NTSC Switc (2 builds)
Amazon.com
$37.99

FPV Transmitter

Team Blacksheep TBS Unify PRO 5G8 HV - Race 2 (MMCX) (2 builds)
Amazon.com
$32.95

Antenna

iFlight Pagoda-2 5.8G RHCP Omni FPV Antenna MMCX for FPV Quadcopeter TX/RX/VTX (Pack of 2)
Amazon.com
$10.99

Receiver

FrSky R-XSR Ultra SBUS/CPPM D16 16CH Mini Redundancy Receiver for RC Multirotor FPV Racing Drone (936 builds)
Amazon.com
$24.00

Batteries

Tattu 14.8V 4S 75C 850mAh LiPo Battery Pack with XT30 Plug for Multirotor FPV from Size 100 to 180 Owl Racing Quadcopter
Amazon.com
$25.99

Misc Parts

BETAFPV 6pcs Amass XT30 Plug Connector Male 68mm with 18AWG Silicone Cable for 2S LiPo Battery FPV Quadcopter Beta75X 2S Whoop D
Amazon.com
$8.99

Misc Parts

532pcs Heat Shrink Tubing Black innhom Heat Shrink Tube Wire Shrink Wrap UL Approved Ratio 2:1 Electrical Cable Wire Kit Set Lon
Amazon.com
$7.98

Misc Parts

Litorange 320PCS M2 Male Female Nylon Hex Spacer Standoff Screw Nut Assorted Assortment Kit (Black)
Amazon.com
$12.99
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Discussion

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Schwifty McVeigh   Sep 06, 2019  

i reluctantly just ordered one of these frames and was curious what kind of punch and flight times youre getting? did you manage to get it under 250grams?

dadougler   Sep 10, 2019 

I don't have super accurate scales at work. But I weight this with the 650mah 4s and it was right around 200g. I haven't been able to test a full flight for flight times yet.

Schwifty McVeigh   Sep 10, 2019 

i ended up completing my build with this frame yesterday. with a 650mah battery and 1507 motors it comes in at 248 grams. with hard freestyle i get 4 minutes of flight time. it is a pretty heavy frame but does the job for now.

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