Fractal 04 Air

By Davidpe on Apr 25, 2025

5  0  5

This was a challenging but satisfying build. It was inspired by JakeFPV and used the Fractal Engineering 75 frame kit. I pulled the motor and SH1.0-6Pin HD digital port and direct soldered. With two boards it raised up the stack a bit and requires a frame cut on the Mobula7 V4 75mm frame. Fortunately I bought a backup because it's a bit tricky to figure out the best prop guard cuts and I screwed up the first frame.

I'm using the Tiny Whoop 0802/ 25Kv Snowblower motors with 1.5mm shafts. I really like these motors and have been anxious to use them.

I'm using the new DJI 04 Air unit which has been great so far! Quality on par with the DJI 03 Air however does not touch the quality of the DJI 04 Air Pro. I used an Ort Antenna which is my go-to for any of my naked 03/04 builds.

The frame looks hashed up but it's a result of the way you have to snip the frame. I don't love that but it's just a cosmetic thing and does it's job to protect the props.

JakeFPV created some nice design files for the camera mount and I printed the Frantal Engineering grommets to connect the boards. I did have to purchase some extra long 1.7 x 10mm screws.

It flies great and still blows me away that you can have this image quality in such a tiny package!

Photos

Discussion

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JakeFPV   7 days ago  

Hey that looks familiar! love to see it man amazing build!

Davidpe   6 days ago 

It should! Thanks for the inspiration. I'm loving this thing.

Davidpe   8 days ago  

BF 4.5.1 Diff All

Betaflight / STM32G47X (SG47) 4.5.1 Dec 6 2024 / 06:48:51 (77d01ba3b) MSP API: 1.46

config rev: 283a21f

start the command batch

batch start

reset configuration to default settings

defaults nosave

board_name BETAFPVG473
manufacturer_id BEFH
mcu_id 005500233841501420343141
signature

name: Fractal 04 Lite

feature

feature OSD

serial

serial 1 0 115200 57600 0 115200
serial 3 131073 115200 57600 0 115200

beeper

beeper -ON_USB

beacon

beacon RX_LOST
beacon RX_SET

map

map TAER1234

aux

aux 0 0 0 1400 2100 0 0
aux 1 13 2 1400 2100 0 0
aux 2 35 3 1400 2100 0 0

master

set gyro_lpf1_static_hz = 0
set dyn_notch_count = 1
set dyn_notch_q = 400
set dyn_notch_min_hz = 120
set dyn_notch_max_hz = 400
set acc_hardware = NONE
set acc_calibration = 24,-14,11,1
set baro_hardware = NONE
set dshot_idle_value = 500
set dshot_bidir = ON
set dshot_bitbang = AUTO
set motor_pwm_protocol = DSHOT300
set motor_poles = 12
set motor_output_reordering = 2,3,0,1,4,5,6,7
set align_board_pitch = 180
set vbat_max_cell_voltage = 440
set vbat_min_cell_voltage = 325
set vbat_warning_cell_voltage = 340
set vbat_scale = 112
set ibata_scale = 550
set ibata_offset = -100
set yaw_motors_reversed = ON
set small_angle = 180
set pid_process_denom = 2
set osd_units = IMPERIAL
set osd_rssi_dbm_alarm = -99
set osd_vbat_pos = 2561
set osd_rssi_pos = 192
set osd_link_quality_pos = 2496
set osd_rssi_dbm_pos = 2305
set osd_rsnr_pos = 160
set osd_tim_1_pos = 386
set osd_tim_2_pos = 3629
set osd_remaining_time_estimate_pos = 33
set osd_flymode_pos = 1550
set osd_throttle_pos = 1518
set osd_vtx_channel_pos = 33
set osd_crosshairs_pos = 313
set osd_current_pos = 2592
set osd_mah_drawn_pos = 2625
set osd_craft_name_pos = 2582
set osd_home_dist_pos = 98
set osd_flight_dist_pos = 130
set osd_warnings_pos = 14837
set osd_avg_cell_voltage_pos = 44
set osd_pit_ang_pos = 97
set osd_rol_ang_pos = 65
set osd_disarmed_pos = 267
set osd_esc_tmp_pos = 129
set osd_esc_rpm_pos = 150
set osd_core_temp_pos = 225
set debug_mode = GYRO_SCALED
set gyro_1_sensor_align = CW0
set gyro_1_align_yaw = 0
set craft_name = Fractal 04 Lite
set pilot_name = Davey Boy

profile 0

profile 0

set profile_name = GF 35mm
set vbat_sag_compensation = 100
set iterm_relax_type = GYRO
set throttle_boost = 0
set i_pitch = 75
set d_pitch = 57
set f_pitch = 31
set i_roll = 72
set d_roll = 42
set f_roll = 30
set i_yaw = 72
set f_yaw = 30
set d_min_roll = 42
set d_min_pitch = 57
set thrust_linear = 30
set feedforward_averaging = 2_POINT
set feedforward_smooth_factor = 60
set feedforward_jitter_factor = 10
set dyn_idle_min_rpm = 30
set simplified_i_gain = 90
set simplified_d_gain = 140
set simplified_dmax_gain = 0
set simplified_feedforward_gain = 25
set simplified_pitch_d_gain = 120
set tpa_rate = 70
set tpa_breakpoint = 1400

profile 1

profile 2

profile 3

restore original profile selection

profile 0

rateprofile 0

rateprofile 0

set rateprofile_name = OG
set roll_rc_rate = 22
set pitch_rc_rate = 18
set yaw_rc_rate = 16
set roll_expo = 56
set pitch_expo = 56
set yaw_expo = 56
set roll_srate = 75
set pitch_srate = 60
set yaw_srate = 53

rateprofile 1

rateprofile 1

set rates_type = BETAFLIGHT
set roll_rc_rate = 142
set pitch_rc_rate = 162
set yaw_rc_rate = 145
set roll_expo = 23
set pitch_expo = 23
set yaw_expo = 23
set roll_srate = 77
set pitch_srate = 77
set yaw_srate = 71

rateprofile 2

rateprofile 3

restore original rateprofile selection

rateprofile 0

save configuration

save

Jeremy257   9 days ago  

Slick, I have all the parts and planned to do the same. Thanks for showing the way with the Matrix FC! :) How hard was it to remove the HD plug from the AIO? Did you snip the corners off the 04 air unit like you did on the FC?

Davidpe   9 days ago 
1

Thanks! It's a tricky build but a lot of fun. the HD digital port was easy to remove however I decided not to use the pads underneath and instead use the TX4/RX4 pads next to the removed HD port. I also used the 5v/ground pads next to the removed HD port. Just for simplicity of soldering.

I did not snip the corners off the 04 air. In fact, I ended up not really needing to snip the FC corners.

One other thing I changed. And I need to post some updated pics. I rerouted the ORT antenna to the as to not interfere with the battery leads.

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