MIDN Prickett, Swegle, Harris, Hong, Letson, Price, Satterlee 1

TEAM DESIGNATIONS

2

Fleet Application

Limited Forms of Cargo Transport

No true short to mid range cargo transport from ship to shore or vice versa

Payloads ranging from 0-11 lbs

Deliveries limited to aviation capable ships

3

Mission Statement

“To deliver small payloads up to 5kg(11lb) from the flight deck of a LCS to ground

units and return back to the flight deck with minimal effort from the operator.”

4

Design Options

We narrowed it down to either a quadcopter or VTOL transition aircraft based

on the stoplight chart below. Mission was put before build complexity, which

led to our decision.

Ship to Shore Delivery UAS Stoplight Chart

Conventional Fixed Wing

Aircraft Multirotor (Quadcopter) VTOL Transition Aircraft

Payload delivery to pre-designated remote locations

Unable to land in remote

locations

All weather capability (ability to operate in 25 knot

gusting winds)

No shipboard modifications required for all weather

operations

A net or equivalent will be

needed

Elevated Sea State Recovery

A net or equivalent will be

needed

Manual and autonomous operating modes

Self contained and used by a single operator

Lift to drag cruise performance rank 1 3 1

Control system complexity (1= Easiest, 3= Hardest) 1 2 3

Fabrication complexity (1= Easiest, 3= Hardest) 1 2 35

Initial Sizing

VTOL Design Option Quadcopter Design Option

6

Which Design Option Is More Efficient?

Specific Productivity Transport Efficiency

7

VTOL gives additional range

New 6 nm range allows for delivery to land units while maintaining safe distance from shore

Additional VTOL Capability

8

Additional VTOL Capability

9

Mission Success Criteria Breakdown

10

11

Propulsion•Sizing:

•Range: 6 nm

•Endurance: 11.33 minutes

•Components:

•Motor: 3x Tiger Motor U-Power U7 490Kv

•Propeller: (Front) 2x 18x12E, (Rear) 18x5.5MR; Wind tunnel Testing

•ESC: 3x Tiger Motor T80A ESC

•Battery: 2x Tattu 6S 6200 mAh Lipo (parallel connection)

Flight Condition Time (min / hr) Power Required (W) mAh Required Thrust Required (lb) Thrust Available (lb)

VTOL (Payload) 1 / 0.0167 3933 2959 27 30.6

VTOL (No Payload) 1 / 0.0167 2058 1548 16 30.6

Cruise 9.33 / 0.1556 600 4205 2 10.72

Total 11.33 min - 8712 - -12

Tricopter Frame

● Tricopter Frame was built using ½’’ x ½’’

x 1/16’’ 6063 aluminum tube.

● 16.5 feet of aluminum was used to build

the whole tricopter frame for a total

weight of 3.3 lbs

● This tricopter frame was able to

withstand 4g loading

● Integrated with wingsFEA of stress analysis on

new frame

13

Transition Mounts

14

Cargo Delivery System

• Servos hold cargo in place, pins pulled autonomously to release payload

• Open bottom in fuselage• “Convertible” concept

15

AerodynamicsWing Parameter Value Units

S 12 ft2

Aspect Ratio 8.33 -

b 8 ft

Taper Ratio 0.5 -

Washout 6 degrees

Dihedral 0 degrees

Sweep 20 Degrees (c/4)

Cr 2 ft

Ct 1 ft

Winglet Parameters

Half Span 1 ft

Cr 1 ft

Ct 1 ft

Sweep 30 degrees

V-Speed Value Units

Vs 22 knots

Vy 35 knots

ROCMax 1275 ft/min

Vbe 23 knots

Vbr = Vbg 31 knots

Vcarson 41 knots

Vh 62 knots

Vne 74 knots

16

Flight Dynamics

- Initial flight test led to control surface resizing

- 5% Static Margin with demonstrated stability through flight test

- Vertical mode stable - rear motor rotates to counteract yaw in Y3 design

- Horizontal mode stable (proven through flight test)

- Transition (blend) mode stable

- 45° motor orientation to gain horizontal speed then 0° motor rotation once 24 kts is achieved

17

Mission Systems

Requirement: Stability in Hover, forward and transitioning flight

UI: QGroundcontrol & Mission Planner

FCS:

Arducopter 3.3.4 RC Control VTOL Firefly Y6 Firmware

Tricopter MOD2 Mk2 Double Puller MOD2 Mk1 Davids 1

18

Tricopter Evolution

19

Current State

3 Models currently built

Tricopter MOD2 Mk2 (Vertical flight model): Tuned, flies autonomously, flown in high winds.

- Plan: Mount P80 Propulsion system (Heavy Lift backup) and new wiring system installed

Davids 1 (Transition model): New electronics and wiring onboard, needs vertical flight tuning,

transition capable (airspeed sensor,etc)

- Plan: Tune vertical flight in Halsey 19APR-21APR, Transition attempt 29APR

Davids 2 (Vertical flight and payload delivery model): Waiting on rear motor mount to be

printed and welded. Front motors fixed in vertical flight mode.

- Plan: Mount electronics, utilize tricopter firmware, tune and fly route autonomously with autonomous

payload delivery.20

21

22

Schedule

23

Questions?

24

Forward Propeller Optimization

25

Rear Propeller Optimization

26

Rear Propeller Optimization cont.

27

Propeller Options at 10 lbs of

Thrust.

Propeller Options at Maximum

Thrust.