UltraLight 7"

By Blunzn on Jul 21, 2019

11  1,296  10

Druckbär Ultralight 4 Race with custom 7" racearms.
2405 1722kv Hyperlite
temporary HGLRC F4 Stack
will be replaced with Matek F722 mini / Aikon ak32pin 35A esc
Runcam Micro Eagle
TBS Unify Pro32
Crossfire Diversity Nano
Lumenier AXII 2 Long Range
Hellgate Buzzer
Gemfan 7042

285g

Final Build will include a canopy with
Caddx Turtle v2 or Runcam Split 3
and a 4g BN180 GPS
~315g

there is a lot of weight to be saved replacing the mmcx vtx/mmcx to sma adapter/longrange antenna with a lighter 800mw vtx + ufl antenna. sub 300g would be possible.

first tests, sporty cruising
sls noc 4s 1550 ~5 min
sls noc 4s 1800 ~8:30min
got a 2300mah 30c lipo too for the next tests

Backup-quad will have same parts except
custom 6" racearms
Racer nano
Caddx Turtle v2
2205.5 1722 Hyperlite
Gemfan 6042
292g

work in progress

Photos

Part List

Frame

Druckbär Ultralight 4 Race (2 builds)
Druckbaer-racing-frames.de
$77.93

Flight Controller

Mini Flight Controllers (20x20) (12 builds)
Racedayquads.com
$41.59

ESCs

Aikon AK32PIN 4-in-1 35A 6S 20x20 (55 builds)
Pyrodrone.com
$59.00

Motors

4 x PyroDrone HyperLite 2405-1722 HV Edition (3 builds)
Pyrodrone.com
$91.96

Propellers

2 Pairs Gemfan Flash 7042 7.0x4.2 PC 2-blade Propeller 5mm Mounting hole for RC FPV Racing Drone (13 builds)
Banggood.com
$3.86

FPV Camera

CADDX Turtle V2 TURBO EYES LENS (64 builds)
Pyrodrone.com
$64.99

FPV Camera

RunCam Racer Nano (16 builds)
Pyrodrone.com
$25.99

FPV Transmitter

TBS Unify Pro32 HV 5.8GHz Video Transmitter (MMCX) (80 builds)
Getfpv.com
$49.95

Antenna

Lumenier AXII 2 5.8GHz Long Range SMA Antenna - RHCP or LHCP (48 builds)
Racedayquads.com
$19.99

Receiver

TBS Crossfire Diversity Nano Rx - FPV LONG RANGE DRONE RECEIVER (48 builds)
Team-blacksheep.com
$49.95

Batteries

SLS NOC Race 1800mAh 4S1P 14,8V 2N (3 builds)
Stefansliposhop.de
$37.67

Batteries

SLS NOC Race 1100mAh 6S1P 22,2V 2N
Stefansliposhop.de
$37.21

Batteries

TATTU 2300mAh 14.8V 45C 4S1P Lipo Battery Pack (2 builds)
Gensace.de
$36.05

Misc Parts

MAMBA FLASH BANG SW401 LED BOARD (3 builds)
Pyrodrone.com
$9.99

Misc Parts

2 x TBS CROSSFIRE IMMORTAL T ANTENNA V2 - EXTENDED
Pyrodrone.com
$11.90

Misc Parts

HellGate FPV Buzzer - HellGate FPV Buzzer (17 builds)
Buzzer.hellgatefpv.com
$25.01

Misc Parts

Smallest Mini Dual GLONASS+GPS BN-180 Micro Double GPS Antenna Module UART TTL For CC3D F3 RC Drone Airplane (31 builds)
Banggood.com
$11.32
Show stores (9)

Discussion

Sign in to comment

alwaysbless   Jul 28, 2019  

Its like you attached a micro to the top of a full sizes quad lol. Very interesting design!

FPVisioning   Jul 23, 2019  

I kind of want to build a even lighter one

Blunzn   Jul 23, 2019 

there is still a lot of potential. go for a light 14x14 cam, like the nano racer ~4g, instead of a ~8g micro eagle/ratel. my vtx (9g)/antenna(11g)/mmcx-sma adapter(3,5g) are pretty heavy. a simple 5g 800mw vtx and a 2-3g ufl antenna would reduce weight by ~20g. also the new upcoming runcam split 3 nano will be a few grams lighter than the turtel v2. and maybe it has a good enough fpv picture to get rid of the second cam alltogether.

MattS   Jul 22, 2019  
1

Great Job! I'm currently working on a similar project and hoping to have it finished by the end of the week! I'm using a little beefier motors though - Hyphylite 2408.5 1622kv for 7" on 6S. Also using a WhitenoiseFPV Synergy F4 with Crossfire Nano and a TBS Unify. I don't think with those porky motors I'll be able to get it under 300g (40g per motor)...  I'm looking forward to seeing photos with the canopy.

fovea   Jul 22, 2019  

what means ul-7" in weight?

Blunzn   Jul 22, 2019 
1

as of now its ~285g. the final weight with turtle, gps and canopy will be around 310g

freerider101   Jul 22, 2019 
1

God all mighty... that is light!!!

fovea   Jul 22, 2019 

thanks for share, nice build and video!

KryptoSteel24   Jul 22, 2019  

slap a go pro on that baby !

fovea   Jul 22, 2019 

nooo - ul means no useless gopro! at least for me.

Guides & Reviews

59 4,800  49
Aug 26, 2020

For the longest time we've been limited to 3 to 4 minutes of flight and lots and lots of batteries. With more efficient motors and frame designs it's now possible to push the envelope much further. This guide will walk you through the process of building a micro long range quad capable of flying 8-30 minutes and more than 4km. The build is moderately difficult, but with the right tools and steady hands..

Read more
36 2,690  19
Jul 20, 2020

Until recently GoPros were delegated to larger quads. A typical GoPro weighs around 125g and we've only recently begun to mount them on 3" cinewhoops. Even that is a stress on the motors. Now we've got the "GoPro Lite". Remove the battery, displays and casing and you're left with a small, lightweight board and sensor. Wrap it in protective TPU casing and you've got a 30g micro GoPro. The Hero6 is..

Read more