gps-denied-onboard/_standalone/UAV_frame_material/01_solution/solution_draft07.md

Solution Draft (Rev 07) — Complete UAV BOM & Cost Analysis

Reconnaissance fixed-wing UAV. 18 kg MTOW, 3.8m wingspan, catapult launch, parachute recovery. S2 GFRP airframe with CF wing spar. Optimized for radio transparency, parachute landing durability, and field repairability.

Material Architecture

S2 fiberglass (GFRP) everywhere — skins, fuselage structure, ribs, hat-section stiffeners, tail surfaces, control surfaces. Carbon fiber only in the main wing spar (one per wing half, carry-through at fuselage center section).

The CF wing spar runs spanwise through the wing and connects at the fuselage center section, providing flutter resistance and torsional rigidity. The fuselage remains 100% GFRP — fully RF-transparent, radar-transparent, field-repairable, with no hidden damage from parachute landings.

Fuselage panels use foam-core sandwich construction (S2 FG skins over PVC foam core). Hat-section S2 FG ribs at load-bearing stations.

Bill of Materials — Complete UAV (Per Unit)

1. Composite Reinforcement Fabrics

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
1.1	S2-glass cloth, 6oz plain weave	Style 4533, 30" width, aerospace silane finish	15 yd	~2.0 kg (in laminate)	$10.45/yd	$156.75	LeapTech	S2 provides 30-40% higher tensile strength and 10× fatigue life vs E-glass. 6oz for 2mm skin layups (3-4 layers). Plain weave for compound curves.
1.2	S2-glass cloth, 9oz satin weave	Style 7781, 38" width	5 yd	~0.8 kg (in laminate)	$14.50/yd	$72.50	LeapTech	Satin weave drapes on tight-radius parts (nose cone, wing root fairing). 9oz for wing root junction reinforcement.
1.3	CF unidirectional tape, 250gsm, 50mm	12K, glass cross-stitch	8 m	~0.15 kg	$4.70/m	$37.60	Easy Composites	Maximum stiffness along spar axis. 50mm matches spar cap. 4-6 layers per cap.
1.4	E-glass cloth, 4oz plain weave	Standard, 50" width	3 yd	—	$4.50/yd	$13.50	The Gelcoater	Non-structural areas: cable guides, servo mount pads. E-glass adequate where S2 premium isn't needed.

Subtotal fabrics: ~$280 / ~3.0 kg in laminate

2. Matrix Resin System

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
2.1	Aeropoxy PR2032 + PH3660 hardener	3:1 mix, 1-hour pot life	1 qt kit	~0.9 kg	$81.50	$81.50	Aircraft Spruce	Aerospace-grade, Rutan-tested. Room-temp cure. Good wet-out. Compatible with S2 FG and CF.
2.2	Aeropoxy PR2032 + PH3630 fast hardener	3:1 mix, 30-min pot life	1 pint	~0.45 kg	$45.00	$45.00	Aircraft Spruce	Fast hardener for bonding joints, fillets, quick repairs.

Subtotal resin: ~$127 / ~0.8 kg in structure

3. Core Material

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
3.1	PVC foam core, 3mm, 80 kg/m³	EasyCell 75 / Divinycell H80	8 sheets	~0.33 kg	$9.10/sheet	$72.80	Easy Composites	Fuselage panels, tail surfaces. 3mm foam + 2×1mm FG skins = ~5mm sandwich.
3.2	PVC foam core, 5mm, 80 kg/m³	Same material, thicker	4 sheets	~0.27 kg	$9.10/sheet	$36.40	Easy Composites	Wing trailing edge panels and control surfaces.

Subtotal core: ~$109 / ~0.60 kg

4. Consumables (Layup & Cure)

#	Component	Specification	Qty	Unit Price	Total	Link
4.1	Vacuum bagging kit	Film, sealant tape, peel ply, breather, tubing	1 kit	$42.48	$42.48	Fiberglass Supply
4.2	Mold release wax	Partall paste wax, 12oz	1 can	$18.00	$18.00	Aircraft Spruce
4.3	PVA mold release	Liquid, 1 pint	1 pint	$12.00	$12.00	Aircraft Spruce
4.4	Mixing cups, brushes, squeegees	Assorted laminating tools	1 set	$25.00	$25.00	Various
4.5	Sandpaper assortment	80, 120, 220, 400 grit	1 pack	$15.00	$15.00	Various
4.6	Acetone / IPA	Surface cleaning, 1 gallon	1 gal	$12.00	$12.00	Various

Subtotal consumables: ~$125

5. Structural Hardware

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
5.1	Wing root aluminum fittings	6061-T6, CNC machined	2 pcs	~120g	$35.00/pc	$70.00	SendCutSend	Transfers wing bending loads to fuselage. Small, inspectable, not in RF path.
5.2	Wing spar carry-through tube	Pultruded CF tube, 25mm OD × 1.5mm	0.6 m	~60g	$15.00	$15.00	DragonPlate	Connects L/R wing spars through fuselage. Airframe backbone.
5.3	Control surface hinges	Composite-compatible pin hinges, 50mm	10 pcs	~50g	$2.50/pc	$25.00	Aircraft Spruce	Aileron (4), elevator (4), rudder (2). Stainless steel pins.
5.4	Servo mounting plates	G10 fiberglass, 3mm, 100×60mm	5 pcs	~45g	$3.00/pc	$15.00	Aircraft Spruce	RF-transparent, strong, bonds into FG structure.
5.5	Threaded inserts	M3 and M4 brass	30 pcs	~30g	$0.50/pc	$15.00	Various	Access panels, servo covers, wing mounting.
5.6	Stainless fasteners	M3, M4 bolts/nuts/washers kit	1 kit	~80g	$20.00	$20.00	Various	Corrosion resistant.
5.7	Push rods + clevis	2mm steel rod + nylon clevis	5 sets	~60g	$4.00/set	$20.00	HobbyKing	Servo-to-surface linkage.

Subtotal hardware: ~$180 / ~0.45 kg

6. Belly Protection (Parachute Landing)

#	Component	Specification	Qty	Weight	Unit Price	Total	Why This
6.1	Replaceable belly panel	S2 FG / foam sandwich, 2mm skins + 3mm foam	2 pcs (1+spare)	~150g each	$15.00/pc	$30.00	Sacrificial panel, field-swappable in <10 min.
6.2	EVA foam bumper strip	15mm closed-cell, adhesive-backed	1 m	~40g	$5.00	$5.00	Wraps gimbal cavity. Absorbs minor impacts.

Subtotal belly protection: ~$35 / ~0.19 kg installed

7. Parachute Recovery System

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
7.1	Fruity Chutes FW Recovery Bundle	IFC-120-S Iris Ultra Compact + pilot chute + deployment bag + Y-harness + shock cord	1 system	950g	$830.00	$830.00	Unmanned Systems Source	Proven fixed-wing recovery system. IFC-120-S canopy rated 44lb (20kg) @ 15fps (4.6 m/s). Pilot chute ensures reliable air-stream deployment. Spectra shroud lines. Compact packing (190 cu"). Repackable. No pyrotechnics, no CO2 — just pilot chute + deployment bag for planned parachute landings.
7.2	Servo-actuated hatch	Spring-loaded door, triggered by autopilot	1	80g	$30.00	$30.00	Custom	Autopilot triggers servo → spring ejects parachute bag into airstream. Same concept as Shark M: simple, reusable, no gases or explosives.
7.3	Parachute riser cutter	Servo-actuated line cutter	1	30g	$40.00	$40.00	Custom	Cuts risers after touchdown to prevent wind drag.

Subtotal parachute: ~$900 / ~1.06 kg

8. Propulsion

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
8.1	T-Motor AT4120 KV250	Long shaft pusher motor, 12S rated, 2100W max	1	304g	$110.00	$110.00	T-Motor Store	12S rated, triple-bearing long shaft for pusher config. At 40-50% throttle: 275W cruise, 7.8-8.7 g/W efficiency. 304g is lightweight for this power class.
8.2	T-Motor ALPHA 60A 12S ESC	FOC, 18-50.4V, 60A continuous	1	73g	$110.00	$110.00	T-Motor Store	Matched to AT4120 motor. FOC for smooth low-RPM cruise. 60A continuous gives ample margin over ~7A cruise draw. Built-in protections.
8.3	APC 16×8E propeller	Thin electric, fiberglass nylon	3 pcs (1+2 spare)	~52g each	$10.00/pc	$30.00	APC Propellers	Excellent efficiency data matched with AT4120. 16" diameter for high propulsive efficiency at low RPM. Spares included — props are consumables.

Subtotal propulsion: ~$250 / ~0.43 kg installed

9. Servos

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
9.1	Digital metal gear servos	HV, 5-10 kg·cm torque, coreless	5 pcs	~175g total	$25.00/pc	$125.00	Savox / KST	2 aileron, 2 elevator, 1 rudder. Metal gears for reliability. HV (6-8.4V) powered direct from BEC. Coreless for precision and longevity.

Subtotal servos: ~$125 / ~0.18 kg

10. Flight Controller & Navigation

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
10.1	Holybro Pixhawk 6X Mini Set	STM32H753, triple IMU, PM02D power module	1 set	~38g	$313.00	$313.00	Holybro	Industry standard for ArduPilot. Triple redundant IMU. Ethernet for Jetson link. Mini form factor for fixed-wing.
10.2	Holybro M10 GPS	u-blox M10, GPS/Galileo/GLONASS/BeiDou, compass	1	~20g	$44.00	$44.00	Holybro	Matches Pixhawk 6X connector. Multi-constellation GNSS. Includes IST8310 compass, buzzer, safety switch.

Subtotal flight controller: ~$357 / ~0.06 kg

11. Onboard Computer

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
11.1	NVIDIA Jetson Orin Nano Super 8GB	67 TOPS AI, ARM Cortex-A78AE	1	~60g (board only)	$249.00	$249.00	NVIDIA	Runs GPS-denied navigation (visual odometry, terrain matching) + AI reconnaissance pipeline. 67 TOPS for real-time inference. Ethernet to Pixhawk.

Subtotal compute: ~$249 / ~0.06 kg

12. Cameras

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
12.1	ADTI 26S V1 + 35mm lens	26MP APS-C, Sony IMX571, mechanical shutter	1	~122g	$1,890.00	$1,890.00	UnmannedRC	GPS-denied navigation camera. Mechanical shutter eliminates rolling shutter distortion at speed. 21.6 cm/px GSD at 2 km. Lightest 26MP APS-C option (122g with lens).
12.2	Viewpro Z40K 4K gimbal	4K 20× optical zoom, 3-axis stabilized, 25.9MP	1	~595g	$3,000.00	$3,000.00	Viewpro	AI reconnaissance camera. 2.7 cm/px GSD at 2 km max zoom. 103×58m FoV in 4K. 479g lighter than Viewpro A40 Pro. PWM/TTL/SBUS control compatible with ArduPilot.

Subtotal cameras: ~$4,890 / ~0.72 kg

13. Communications

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
13.1	TBS Crossfire Nano RX	915 MHz, long range RC receiver	1	~2g	$30.00	$30.00	GetFPV	Long-range RC link (>40 km). Ultra-light. ArduPilot CRSF protocol support.
13.2	RFD900x telemetry modem (air)	900 MHz, 1W, >40 km range, AES-128	1	~30g	$97.00	$97.00	Droneyard	MAVLink telemetry + mission commands. Encrypted. Long range. Pixhawk-native integration.

Subtotal comms: ~$127 / ~0.03 kg

14. Power System

#	Component	Specification	Qty	Weight	Unit Price	Total	Link	Why This
14.1	Tattu 6S 33Ah 350 Wh/kg semi-solid	22.2V, 10C, 2216g each, XT90-S	4 pcs	8.86 kg total	$750.00/pc	$3,000.00	GenStattu	4× in 2S2P → 12S 66Ah (2930 Wh). 350 Wh/kg is highest available density in production. 500+ cycle life at 90% retention. Modular — individual pack replacement.
14.2	Power distribution board + BEC	12S input, 5V/3A + 12V/3A BEC outputs	1	~25g	$30.00	$30.00	Various	Powers servos (5V HV), Pixhawk, GPS, RC receiver.
14.3	Wiring + connectors + battery bus	10-12AWG silicone, XT90, series adapters, parallel bus bar	1 set	~450g	$80.00	$80.00	Various	2S2P wiring: 2× series adapters + parallel bus bar. Redundant connectors.

Subtotal power: ~$3,110 / ~9.34 kg

15. Catapult Interface

#	Component	Specification	Qty	Weight	Unit Price	Total	Why This
15.1	Belly mounting rails	Aluminum rails for catapult carriage attachment	1 set	~150g	$50.00	$50.00	Interface between airframe and pneumatic catapult carriage. Quick-release on launch.

Subtotal catapult interface: ~$50 / ~0.15 kg

16. Field Repair Kit

#	Component	Specification	Qty	Weight	Unit Price	Total
16.1	S2-glass patches	6oz, 150×150mm pre-cut	10 pcs	~50g	$2.00/pc	$20.00
16.2	Field epoxy kit	Aeropoxy PR2032/PH3630 fast, 4oz	1	~120g	$25.00	$25.00
16.3	Repair tools pouch	Cups, gloves, sandpaper, scissors, tape	1	~200g	$15.00	$15.00
16.4	Spare belly panels	Pre-manufactured (item 6.1)	3 pcs	~450g (stored)	$15.00/pc	$45.00

Subtotal repair kit: ~$105 / ~0.37 kg carried

Weight Summary

Category	Weight
S2 FG skins + ribs + stiffeners (cured laminate)	~3.80 kg
Foam core (in sandwich panels)	~0.45 kg
CF wing spar (both halves, cured)	~0.20 kg
Structural hardware (fittings, fasteners, hinges)	~0.45 kg
Belly panel + bumper (installed)	~0.19 kg
Catapult belly rails	~0.15 kg
Parachute system	~1.06 kg
Airframe subtotal	~6.30 kg
Motor + ESC + propeller	~0.43 kg
Servos (×5)	~0.18 kg
Pixhawk 6X + GPS	~0.06 kg
Jetson Orin Nano Super	~0.06 kg
ADTI 26S V1 + 35mm lens	~0.12 kg
Viewpro Z40K gimbal	~0.60 kg
TBS Crossfire Nano RX + RFD900x air	~0.03 kg
Power distribution + wiring	~0.48 kg
Electronics subtotal	~1.96 kg
4× Tattu 6S 33Ah 350 Wh/kg	8.86 kg
TOTAL	~17.12 kg

Margin to 18 kg MTOW: ~0.88 kg (for paint, antenna, miscellaneous hardware)

Per-UAV Cost Summary

Category	Cost	%
Composite fabrics	$280	3%
Resin system	$127	1%
Foam core	$109	1%
Consumables	$125	1%
Structural hardware	$180	2%
Belly protection	$35	<1%
Parachute system	$900	8%
Field repair kit	$105	1%
Airframe subtotal	$1,861	17%
Propulsion (motor + ESC + props)	$250	2%
Servos	$125	1%
Propulsion + actuators subtotal	$375	3%
Pixhawk 6X Mini Set	$313	3%
GPS M10	$44	<1%
Jetson Orin Nano Super	$249	2%
Avionics subtotal	$606	6%
ADTI 26S V1 + 35mm (navigation)	$1,890	17%
Viewpro Z40K 4K gimbal (reconnaissance)	$3,000	27%
Camera subtotal	$4,890	45%
TBS Crossfire Nano RX	$30	<1%
RFD900x air module	$97	1%
Comms subtotal	$127	1%
4× Tattu 6S 33Ah 350 Wh/kg batteries	$3,000	27%
Power distribution + wiring	$110	1%
Power subtotal	$3,110	28%
Catapult belly rails	$50	<1%
TOTAL PER UAV	$11,019	100%

Cost Drivers

The cameras (45%) and batteries (28%) together account for 73% of per-UAV cost. The airframe material is only 5% ($641 for fabrics + resin + foam). The parachute system at $900 is 8% — significantly reduced from the $2,310 ballistic system in earlier drafts by switching from the Peregrine CO2 ballistic system to the simpler FW Recovery Bundle (canopy + pilot chute + deployment bag). The UAV performs planned parachute landings, not emergency deployments — no ballistic launcher needed.

Tooling (One-Time)

#	Component	Cost	Amortization
9.1	Fuselage mold set (FG/epoxy female, L+R halves)	$800	50+ pulls
9.2	Wing mold set (FG/epoxy female, upper+lower)	$600	50+ pulls
9.3	Tail surface molds (H-stab + V-stab)	$400	50+ pulls
9.4	Wing spar jig (aluminum + MDF fixture)	$200	100+ uses
9.5	Vacuum pump (2.5 CFM electric)	$150	Permanent
9.6	CNC foam plug machining (outsourced)	$1,500	One-time
	Total tooling	$3,650

Ground Equipment (One-Time, Shared)

#	Component	Cost	Notes
G.1	TBS Crossfire TX module	$100	Shared across fleet, plugs into RC transmitter
G.2	RFD900x ground station modem	$200	Shared GCS telemetry module
G.3	RC transmitter (e.g. RadioMaster TX16S)	$200	If not already owned
G.4	Pneumatic catapult (ELI PL-60 class)	$15,000-25,000	Shared launch system; 108 kg, 2 transport cases
	Total GCS equipment (excl. catapult)	$500

Labor

#	Task	Hours (first 5 units)	Hours (at 100 units)	Rate
L.1	Mold prep + release	2h	1h	Technician
L.2	Fuselage skin layup + vacuum bag + cure	8h	5h	Technician
L.3	Wing skin layup + vacuum bag + cure	6h	4h	Technician
L.4	CF wing spar layup + cure	3h	2h	Technician
L.5	Tail surface layup + cure	3h	2h	Technician
L.6	Demolding + trimming	4h	2.5h	Technician
L.7	Assembly (bond ribs, fittings, hardware)	8h	5h	Technician
L.8	Electronics integration + wiring	6h	4h	Technician
L.9	Parachute system install + test	2h	1.5h	Technician
L.10	Finishing (fill, sand, paint)	6h	4h	Technician
L.11	Quality inspection + flight test	4h	2h	Senior tech
	Total labor per airframe	~52h	~33h

Fleet Cost — 5 Aircraft

Item	Calculation	Cost
Tooling (one-time)	Molds + jigs + CNC plugs + vacuum pump	$3,650
GCS equipment (one-time)	TX module + RFD900x ground + RC transmitter	$500
UAV components × 5	$11,019 × 5	$55,095
Labor × 5	52h × 5 × $30/h	$7,800
Spare parts stock	Extra belly panels, props, connectors	$600
Total for 5 aircraft		$67,645
Per aircraft (all-in, incl. tooling)		$13,529
Per aircraft (excl. tooling, marginal)		$12,699

Note: Catapult ($15,000-25,000) is listed separately as ground equipment — not included in per-aircraft cost. It's a shared infrastructure item amortized across operations, not per-unit.

Cost Breakdown — 5 Aircraft

Category	Amount	%
Cameras (×5)	$24,450	36%
Batteries (×5)	$15,000	22%
Airframe materials (×5)	$9,305	14%
Labor	$7,800	12%
Avionics + compute (×5)	$3,030	4%
Tooling	$3,650	5%
Propulsion + servos (×5)	$1,875	3%
Comms (×5) + GCS equip.	$1,135	2%
Spares + repair kits	$1,125	2%
Catapult interface (×5)	$250	<1%

Fleet Cost — 100 Aircraft

At 100 units, bulk pricing and learning-curve labor savings:

Item	Unit Price Change	Reasoning
S2 FG cloth	$7.50/yd (−28%)	Bolt pricing from AGY distributor
CF UD tape	$2.50/m (−47%)	800m order
Epoxy resin	$65/qt kit (−20%)	5-gallon drums
Foam core	$6.50/sheet (−29%)	Case quantity from Diab
Consumables	$80/set (−36%)	Roll quantities
Hardware	$140/set (−22%)	Batch CNC, bulk fasteners
Parachute	$700/unit (−16%)	Volume discount from Fruity Chutes
Motor AT4120	$95 (−14%)	100+ order from T-Motor
ESC ALPHA 60A	$95 (−14%)	100+ order from T-Motor
Batteries	$650/pc (−13%)	Tattu bulk/OEM pricing
ADTI 26S V1	$1,700 (−10%)	Volume pricing
Viewpro Z40K	$2,500 (−17%)	Direct OEM/volume
Pixhawk 6X Mini	$250 (−20%)	Holybro 100+ discount tier
GPS M10	$33 (−25%)	Holybro 100+ discount
Jetson Orin Nano	$199 (−20%)	NVIDIA volume/module pricing
RFD900x	$85 (−12%)	Bulk order
Servos	$20/pc (−20%)	Bulk order
Labor	33h × $30/h = $990 (−37%)	Learning curve, jigs, repetition

Item	Calculation	Cost
Tooling	2 mold sets (50 pulls each) + jigs + vacuum	$7,300
Airframe materials × 100	Bulk-priced fabrics + resin + foam + consumables + hardware	$116,000
Parachute systems × 100	$700 × 100	$70,000
Propulsion × 100	(95 + 95 + 25) × 100	$21,500
Servos × 100	$100 × 100	$10,000
Cameras × 100	($1,700 + $2,500) × 100	$420,000
Avionics × 100	($250 + $33 + $199) × 100	$48,200
Comms × 100	($30 + $85) × 100	$11,500
Power system × 100	($2,600 + $100) × 100	$270,000
Catapult interface × 100	$40 × 100	$4,000
Repair kits × 100	$80 × 100	$8,000
Labor × 100	33h × $30 × 100	$99,000
Spare parts stock	Belly panels, props, misc	$8,000
Quality tools	Ultrasonic tester, etc.	$2,000
GCS equipment	5 GCS sets at $500 each	$2,500
Total for 100 aircraft		$1,098,000
Per aircraft (all-in)		$10,980
Per aircraft (excl. tooling, marginal)		$10,883

Cost Breakdown — 100 Aircraft

Category	Amount	%
Cameras	$420,000	38%
Power (batteries + wiring)	$270,000	25%
Airframe materials	$116,000	11%
Labor	$99,000	9%
Parachute systems	$70,000	6%
Avionics + compute	$48,200	4%
Propulsion + servos	$31,500	3%
Comms + GCS	$14,000	1%
Tooling + quality tools	$9,300	1%
Repair/spares	$16,000	2%
Catapult interface	$4,000	<1%

Scaling Comparison

Metric	5 Aircraft	100 Aircraft	Savings at Scale
Per-aircraft total cost	$13,529	$10,980	−19%
Per-aircraft airframe	$1,861	$1,160	−38%
Per-aircraft cameras	$4,890	$4,200	−14%
Per-aircraft batteries	$3,000	$2,600	−13%
Per-aircraft labor	$1,560	$990	−37%
Tooling per aircraft	$730	$73	−90%
Parachute per aircraft	$900	$700	−22%

Scaling savings are modest (19%) because cameras and batteries dominate cost and have limited bulk discount potential. The largest percentage savings come from tooling amortization (−90%) and labor learning curve (−37%).

Parachute System Alternatives

The FW Recovery Bundle at $830 is the recommended baseline. For reference, other options:

System	Price	Weight	Rated	Deployment	Pro	Con
Fruity Chutes FW Bundle (recommended)	$830	950g	20 kg @ 15fps	Pilot chute + deployment bag (air-stream)	Proven, sized right, includes harness, repackable	2-4 week lead time
Fruity Chutes Peregrine UAV 5 Light	$2,310	1,480g	20 kg @ 15fps	CO2 ballistic ejection	Fastest deployment, works at zero airspeed	2.8× more expensive, heavier, CO2 cartridge consumable
Foxtech Parachute + Ejector 20kg	$899	1,600g	20 kg	Servo + spring	Cheaper than Peregrine	Designed for multirotor vertical eject, heavier, unproven for FW
Skycat X68 + IFC-84-SUL	~$1,100	420g	17 kg max	Skycat Fuse®	Lightest system, fast deployment	Max 17 kg — borderline for 18 kg MTOW
DIY: Rocketman 120" + custom deployment	~$350	~600g est.	~18 kg	Servo hatch + spring	Cheapest	Unproven for this weight class, 4 shroud lines only

References

1. S2-glass cloth: https://www.carbonfiberglass.com/product/6oz-s-glass-27-width-html/
2. CF UD tape: https://www.easycomposites.co.uk/250g-unidirectional-carbon-fibre-tape
3. Aeropoxy PR2032: https://www.aircraftspruce.com/catalog/pnpages/01-42135.php
4. PVC foam core: https://www.easycomposites.us/easycell75-closed-cell-pvc-foam
5. Fruity Chutes FW Bundle: https://www.unmannedsystemssource.com/shop/parachutes/fixed-wing-bundles/fixed-wing-recovery-bundle-44lbs-20kg-15fps/
6. T-Motor AT4120: https://store.tmotor.com/product/at4120-long-shaft-vtol-pusher-motor.html
7. T-Motor ALPHA 60A: https://store.tmotor.com/product/alpha-60a-12s-esc.html
8. APC 16×8E: https://www.apcprop.com/product/16x8e/
9. Holybro Pixhawk 6X: https://holybro.com/products/pixhawk-6x
10. Holybro M10 GPS: https://holybro.com/collections/gps/products/m10-gps
11. Jetson Orin Nano Super: https://www.nvidia.com/en-us/autonomous-machines/embedded-systems/jetson-orin/nano-super-developer-kit/
12. ADTI 26S V1: https://unmannedrc.com/products/26mp-26s-v1-aps-c-mapping-camera
13. Viewpro Z40K: https://www.viewprouav.com/product/z40k-single-4k-hd-25-times-zoom-gimbal-camera-3-axis-gimbal-uav-aerial-photography-cartography-and-patrol-inspection.html
14. TBS Crossfire Nano RX: https://www.getfpv.com/tbs-crossfire-nano-rx.html
15. RFD900x: https://event38.com/product/rfd-900x-telemetry-set/
16. Tattu 350Wh/kg 6S 33Ah: https://genstattu.com/tattu-semi-solid-state-350wh-kg-33000mah-10c-22-2v-6s1p-g-tech-lipo-battery-pack-with-xt90-s-plug/
17. Foxtech Parachute 20kg: https://store.foxtech.com/parachute-for-20kg-uav-airplanes/
18. Skycat X68: https://www.skycat.pro/shop/skycat-x68-3zdz9
19. Rocketman parachutes: https://www.the-rocketman.com/products/ultra-light-high-performance-drone-parachutes

Related Artifacts

• Previous drafts: solution_draft01.md through solution_draft06.md
• Research artifacts: _standalone/UAV_frame_material/00_research/UAV_frame_material/