Fixed Wing 2025
Introduction
Name
Eclipse
High Level Specs
1.5 m wingspan
Max takeoff weight = 5kg
6S Battery Voltage
~1.1kg of batteries
two 6S packs in parallel
Modular wings & fuselage
Purpose, Quantity, & Timeline
High Level
Pursue the primary purpose for roughly a full year with this plane and then hand it off to other subteams for learning in the secondary purpose before decommissioning
Quantity
A single aircraft will be built (and maintained in the unlikely event of damage)
Primary purpose
learning how to design fixed wings → mechanical skills
learning how to operate fixed wings → ardupilot & pilot skills
Secondary purposes
Custom battery long term? Could be saved for VTOL depending on EE interest
flight testing bench for EE and EFS new CAN architecture.
testing EFS milestones milestones M2 and M3
testing EE ZP3 hardware designs
Budgeting
Will be less expensive than fancy composites
Will be more expensive than hacked together foam planes we’ve done in the past
Related Resources
[DRAFT] S24 Fixed Wing Project Proposal mech’s initial proposal
2024-06-05 Big Fixed Wing Architecture Sync arch sync first one
Mechanical
All mechanical design documents can be found in 2024 Post-Season Fixed Wing Mechanical Decisions Documentation
A row of balsa ribs mounted on an aluminum box tube. The ribs are spaced by 3D printed leading edges
Main doc for airframe design. Main aluminum mounting plate which accommodates 90% of electronics, and the motor
Tail boom and wing spars attach to the main plate
Tail dragger design → 2 wheels at the front and 1 at the tail
Plan is to make the tail wheel steerable for yaw control on ground at low speeds
A conventional tail configuration with 1 servo each for elevator and rudder
Electrical
Electrical Components
Flight controller: Pixhawk 6X
Mounted level in central location
Vibration dampened but robust mounting
Mounting holes are M2, but the dimensions are not in their diagram. You will have to look at the existing mount and/or measure the Pixhawk
All ports accessible
Useful Resources:
Power module: PM02D https://holybro.com/products/pm02d-power-module
Power leads and white JST port accessible
ESC: APD 120 F3 120F3[X] — Advanced Power Drives or Flycolor 80A 12S Flycolor X-Cross HV 80A ESC (5-12s) V3 | Team BlackSheep
Case design already exists for APD ESC
This ESC is kinda overkill
This ESC is expensive asf.
Maybe we sub it with a cheaper one in the future.
Expose this to air for cooling if possible
Motor: AT3530 580KV https://store.tmotor.com/product/at3530-long-shaft-fixed-wing-motor.html
ELRS Receiver: https://rotorvillage.ca/happymodel-expresslrs-tcxo-ep1-dual-rx/
Antennas exposed, solder pads accessible
Analog camera: https://rotorvillage.ca/caddx-baby-ratel-2-fpv-camera/
Facing forward, connector accessible
Max vin = 40V
VTX: XILO STAX 5.8GHz FPV Video Transmitter (25-600mW) w/ Smart Audio
Should be relatively exposed for cooling
Only intended for use on takeoff and landing so while it will get warm it doesn't need super special considerations
How exposed depends on what Tx power and on time we wanna use on the VTX.
Max Vin = 36V
Pitot Tube: https://rotorgeeks.com/matek-digital-airspeed-sensor-aspd-dlvr
Need to receive smooth airflow for most accurate data
Electronics mounted close enough to connect with tube
Has CAN passthrough capability
Magnetometer: https://www.getfpv.com/holybro-dronecan-rm3100-professional-grade-compass.html
Mounted level (can be upside down too)
Away from metal and radios
Away from high current wires
do not mount near motors and batteries
GPS: https://holybro.com/products/m9n-gps
Mounted level, away from metal and high current wires
Printed text on GPS facing air
Safety switch accessible
Rangefinder: https://ca.robotshop.com/products/benewake-tf02-pro-lidar-led-rangefinder-ip65-40m
Mounted level, facing downwards
Unobstructed view of ground
6S Battery: 4500 mAh LiHV batteries in bay
we have 60 of them
Dimensions: 140 mm x 43 mm x 48 mm
Two in parallel.
Servo module
Hoping to be able to use https://uwarg-docs.atlassian.net/wiki/spaces/EL/pages/2596929559/6S+Servo+Module?search_id=c3260b70-5085-4a1c-b8da-0c2765872da3
Backup: https://uwarg-docs.atlassian.net/wiki/spaces/EL/pages/2173960269/Servo+Module+12S?search_id=8095fbab-8b82-4b21-ae73-490aad03c35a or COTS alternative.
Single Servo Driver
CAN Splitter
Lighting PCBA
Raspberry Pi Adapter
Isolated HD Camera
Runcam Thumb
Servos
Electronics System Diagram
Electronics Placement Diagram