After i saw some 5„ sub 250 build, i wanted to own something like that as well - but it must be durable! Decided to go with the good old RCExplorer 10×10 square-carbon tubes that have proven to be nearly indestructible and small 1.5mm centerplates.

As its winter in Germany, i took it to the indoor flying. Hovers at ~10% of throttle and the fist very short throttle push fired it into the ceiling. Power is overwhelming, crash test succeeded

So far i was only able to fly it indoors, most on 2-3S. It flies so stable and is so quite on 2S, can't wait to test the 4S beast outside.

Use Custom Betaflight for BF warnings on DJI OSD

# 

# diff all

# version
# Betaflight / STM32F405 (S405) 4.2.8 Mar 19 2021 / 21:00:59 (norevision) MSP API: 1.43
# config: manufacturer_id: JHEF, board_name: JHEF405, version: dfa09d94, date: 2021-03-06T10:55:26Z

# start the command batch
batch start

# reset configuration to default settings
defaults nosave

board_name JHEF405
manufacturer_id JHEF
mcu_id 003c00423548500720313753
signature 

# name: LOW BATTERY

# feature
feature -RX_PARALLEL_PWM
feature TELEMETRY

# beacon
beacon RX_LOST
beacon RX_SET

# serial
serial 2 1 115200 57600 0 115200
serial 5 64 115200 57600 0 115200

# aux
aux 0 0 0 1700 2100 0 0
aux 1 1 1 900 1300 0 0
aux 2 2 1 1300 1700 0 0
aux 3 13 3 1700 2100 0 0
aux 4 35 2 1700 2100 0 0

# master
set acc_calibration = 6,-26,38,1
set rssi_channel = 15
set serialrx_provider = CRSF
set motor_pwm_protocol = DSHOT600
set align_board_yaw = 90
set vbat_scale = 114
set ibata_scale = 108
set report_cell_voltage = ON
set osd_warn_rssi = ON
set osd_warn_dji = ON
set osd_vbat_pos = 2419
set osd_rssi_pos = 2197
set osd_link_quality_pos = 121
set osd_rssi_dbm_pos = 89
set osd_tim_2_pos = 407
set osd_flymode_pos = 2183
set osd_vtx_channel_pos = 65
set osd_crosshairs_pos = 2287
set osd_current_pos = 2374
set osd_mah_drawn_pos = 2406
set osd_craft_name_pos = 2224
set osd_warnings_pos = 14794
set osd_avg_cell_voltage_pos = 2387
set osd_stat_max_spd = OFF
set osd_stat_bbox = OFF
set osd_stat_bb_no = OFF
set gyro_1_align_yaw = 900
set name = LOW BATTERY

profile 0

profile 1

profile 2

# restore original profile selection
profile 0

rateprofile 0

rateprofile 1

rateprofile 2

rateprofile 3

rateprofile 4

rateprofile 5

# restore original rateprofile selection
rateprofile 0

# save configuration
save
#