Bill of Materials¶

Complete parts list for the Bennu 7" photogrammetry quadcopter.

Pricing

Prices estimated as of 2026. Total: ~$550--750 excluding RC transmitter and 3D printer.

Frame (~$50--70)¶

Component	Part	Price	Notes
Base frame	TBS Source One V5 7" Deadcat	$35--45	Open-source carbon fiber frame, 30.5mm stack, deadcat = no props in camera view
GPS mast base	3D printed (CF-PETG)	~$2 filament	Clips onto rear standoffs, holds 12mm CF tube
Pi 4 top plate adapter	3D printed (CF-PETG)	~$2 filament	Mounts Pi 4 above FC stack on standoffs
Camera mount	3D printed (CF-PETG)	~$2 filament	Bottom-mount, 15° forward tilt for IMX477
Canopy	3D printed (CF-PETG)	~$3 filament	Protects Pi 4 and wiring
CF tube 12mm OD x 150mm	GPS mast	$5	Vertical mast for GPS antenna
M3 hardware + heat-set inserts	Assorted	$10	Frame assembly

Component	Part	Price	Notes
Flight Controller	Holybro Pixhawk 6C	$110--150	STM32H743, dual IMU, PX4 reference board, TELEM2 for companion
ESC	Holybro Tekko32 F4 4-in-1 50A	$60--80	BLHeli_32, DShot600
Motors	T-Motor Velox V2207.5 1950KV x4	$50--60	Efficient at 7", well-proven
Props	HQProp 7x3.5x3 tri-blade x4+ spares	$15	Good thrust/efficiency at survey speed
GPS	Holybro M9N (u-blox M9N)	$40--50	PX4-native, built-in compass
RC Receiver	TBS Crossfire Nano or ELRS 900MHz	$25--40	Long range >10km
Battery	4S 2200--3000mAh LiPo x2	$50--70	~15--20 min flight per battery
Power Module	Holybro PM02	included	Current/voltage sensing
Telemetry	Holybro SiK Radio V3 (433/915MHz)	$40--50	MAVLink to QGC

Component	Part	Price	Notes
Camera	Raspberry Pi HQ Camera (IMX477)	$50	12.3MP, CS-mount, ~35g
Lens	6mm CS-mount	$20	~2cm/pixel GSD at 50--80m

Component	Part	Price	Notes
Computer	Raspberry Pi 4 (4GB)	$55	ROS2, uXRCE-DDS, libcamera
Storage	64GB+ microSD	$10--15	Image storage during flight
Power	BEC 5V 3A	$5--10	Dedicated BEC from battery voltage