Servers by jDrones

RQ-7B Shadow Scratch Build

and fitted the power switch and ignition switch and kill

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congratulations, excellent project, I would love to see you fly.

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install 3 Frsky lipo sensors
and gas suit ( rpm and engine governor and 2 temp sensors )


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and install the 3 axis gimble with gopro hero4 i will be using it to recored 4K video and using it as an FPV camera
and the 800mw video transmitter a

and antenna

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What gimbal are you using there? Looks nice and clean.

Tarot T4-3D 3-axis gimbal

Ok fitted the cube with 2 power bricks and 2 distribution boards one is 7.4 volt for the servos and video TX
the other is 5 volt for receivers 2 x frsky xr8r and osd and rdf 900+
nothing is powered off the cube

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@yak-54

Great job so far Colin! Looks fantastic. What type of wood (6mm plywood ?) and what did you use for paint?

I used 3mm Marine Plywood
its not paint its just cheap covering from hobby King 5 bucks a for 5 meter roll

Interesting! Is it plastic or paper. Looks great on your build

its just cheap iron on covering from hobby King

Ok mounted the new RCGF 61 in test bed and run it up or out of the box setting runs great and i will save 1500g in weight from the 70cc twin


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well all the hardware and the wiring ready to go
now its time to start to program The Cube

from what i have been reading this is some off the setting to start tuning
BRD_TYPE = 3
EK2_IMU_MASK = 7 (or EK3_IMU_MASK = 7 if using EKF3)
INS_USE =1
INS_USE2 = 1
INS_USE3 = 1

The following parameters should be a good starting point: for a large V-Tail

  • RLL2SRV_P: 1.0
  • PTCH2SRV_P: 1.3
  • NAVL1_PERIOD: 19
  • THR_PASS_STAB: 1
  • THR_SUPP_MAN: 1
  • THR_SLEWRATE: 30

SERIAL0_BAUD,115
SERIAL0_PROTOCOL,1
SERIAL1_BAUD,57
SERIAL1_PROTOCOL,1
SERIAL2_BAUD,57
SERIAL2_PROTOCOL,1
SERIAL3_BAUD,57
SERIAL3_PROTOCOL,-1
SERIAL4_BAUD,57
SERIAL4_PROTOCOL,10
SERIAL5_BAUD,57

My Here2 Gps are on the Can Bus
Note SERIAL3_PROTOCOL,-1
Note SERIAL4_PROTOCOL,10
mavlink to frsky passthrough
and i will using yaapu Alex Apostoli telemetry script

screenshot_x10_19-04-27_15-16-08

Lets setup the servos

SERVO_AUTO_TRIM,0
SERVO_BLH_AUTO,0
SERVO_BLH_DEBUG,0
SERVO_BLH_MASK,0
SERVO_BLH_OTYPE,0
SERVO_BLH_PORT,0
SERVO_BLH_TEST,0
SERVO_BLH_TMOUT,0
SERVO_BLH_TRATE,10
SERVO_RATE,50
SERVO_SBUS_RATE,50
SERVO_VOLZ_MASK,0
SERVO1_FUNCTION,4 AILERON
SERVO1_MAX,2100
SERVO1_MIN,900
SERVO1_REVERSED,0
SERVO1_TRIM,1500
SERVO10_FUNCTION,4 AILERON
SERVO10_MAX,2100
SERVO10_MIN,900
SERVO10_REVERSED,0
SERVO10_TRIM,1500
SERVO11_FUNCTION,79 VTAIL_LEFT
SERVO11_MAX,2100
SERVO11_MIN,900
SERVO11_REVERSED,1
SERVO11_TRIM,1500
SERVO12_FUNCTION,3 FLAP
SERVO12_MAX,2100
SERVO12_MIN,900
SERVO12_REVERSED,0
SERVO12_TRIM,1500
SERVO13_FUNCTION,0
SERVO13_MAX,1900
SERVO13_MIN,1100
SERVO13_REVERSED,0
SERVO13_TRIM,1500
SERVO14_FUNCTION,0
SERVO14_MAX,1900
SERVO14_MIN,1100
SERVO14_REVERSED,0
SERVO14_TRIM,1500
SERVO15_FUNCTION,1 RCPassThru gimble
SERVO15_MAX,1900
SERVO15_MIN,1100
SERVO15_REVERSED,0
SERVO15_TRIM,1500
SERVO16_FUNCTION,1 RCPassThru gimble
SERVO16_MAX,1900
SERVO16_MIN,1100
SERVO16_REVERSED,0
SERVO16_TRIM,1500
SERVO2_FUNCTION,80 VTAIL_RIGHT
SERVO2_MAX,2100
SERVO2_MIN,900
SERVO2_REVERSED,1
SERVO2_TRIM,1500
SERVO3_FUNCTION,70 THROTTLE
SERVO3_MAX,1683
SERVO3_MIN,900
SERVO3_REVERSED,0
SERVO3_TRIM,900
SERVO4_FUNCTION,26 GroundSteering ( nose gear )
SERVO4_MAX,2100
SERVO4_MIN,900
SERVO4_REVERSED,0
SERVO4_TRIM,1500
SERVO5_FUNCTION,3 FLAP
SERVO5_MAX,2100
SERVO5_MIN,900
SERVO5_REVERSED,0
SERVO5_TRIM,1500
SERVO6_FUNCTION,61 61:RCIN11 Kill
SERVO6_MAX,1900
SERVO6_MIN,1100
SERVO6_REVERSED,0
SERVO6_TRIM,1500
SERVO7_FUNCTION,60 60:RCIN10 Start
SERVO7_MAX,1900
SERVO7_MIN,1100
SERVO7_REVERSED,0
SERVO7_TRIM,1500
SERVO8_FUNCTION,0
SERVO8_MAX,1900
SERVO8_MIN,1100
SERVO8_REVERSED,0
SERVO8_TRIM,1500
SERVO9_FUNCTION,0
SERVO9_MAX,1900
SERVO9_MIN,1100
SERVO9_REVERSED,0
SERVO9_TRIM,1500

ok i did update the battery from 6000 to 22000 :grin:

well its all over just the maiden to do its winter here now to cold and wet

Hey there, how did you deal with the vibration caused by the engine? Was pixhawk able to fly properly in auto mode? Thanks much.

Hi it has not had its maiden yet to wet and windy it winter here the engine is on a soft mount so vibration should not be an issue

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Gotta, looking forward to the flight video. Cheers!

Servers by jDrones