Flapping Wing Flapping Wing MAVMAV

Group 13 – NASA AmesGroup 13 – NASA AmesParker CookParker Cook

George HellerGeorge HellerJoshua NguyenJoshua NguyenBrittney TheisBrittney Theis

The CustomerThe Customer

- Dr. ShihDr. Shih- Funding to be Funding to be

provided by the provided by the NASA Ames facilityNASA Ames facility

The ProblemThe Problem

- We are tasked with designing and We are tasked with designing and building a flapping-wing micro aerial building a flapping-wing micro aerial vehicle (MAV) that is constrained by vehicle (MAV) that is constrained by certain specifications provided by the certain specifications provided by the customer and inspired by the customer and inspired by the European Micro Air Vehicle European Micro Air Vehicle Conference and Flight Competition.Conference and Flight Competition.

Project Scope and NeedsProject Scope and Needs

OperationOperation SpecificationSpecification

Flight TypeFlight Type Flapping WingFlapping Wing

Flight TimeFlight Time 10mins10mins

Ground ClearanceGround Clearance 5m5m

Flight DistanceFlight Distance 50m50m

Degrees of FreedomDegrees of Freedom 33

Size SpecificationsSize Specifications 10cm x 10cm x 10cm10cm x 10cm x 10cm

WeightWeight 100g100g

Ease of OperationEase of Operation 1 user1 user

Original DesignOriginal Design– 2 Flapping Wings2 Flapping Wings

– Controlled rotation of the wingsControlled rotation of the wings

– The wings use a track to slide back and forthThe wings use a track to slide back and forth

– DC Motor rotating causes the wings to flapDC Motor rotating causes the wings to flap

Dragon Fly InspiredDragon Fly Inspired

– 2 sets of wings in an 2 sets of wings in an

collapsing/expanding collapsing/expanding

X formation in an up X formation in an up

and down movementand down movement

– Tail rotorTail rotor

– DC Motor rotatingDC Motor rotating

– A larger toyA larger toy

Bird

Bat

- Actuated joints in all directions that cause the wings to curve in aiding to the flight

- Fast flapping - More fixed wing then bird but jointed

Design InspirationDesign Inspiration

The Delfly inspired design was chosen as our flapping wing The Delfly inspired design was chosen as our flapping wing MAV because of its ability to meet our customers needs and MAV because of its ability to meet our customers needs and has the highest probability to fulfill our design criteria and has the highest probability to fulfill our design criteria and complete all necessary functions.complete all necessary functions.

Gear Train and Wing Gear Train and Wing MechanismMechanism

Motor SelectionMotor Selection

Voltage RPM Current (free) Current (stall)

1.5V 10100 12.4mA 36.8mA

3.0V 20300 17.6mA 73mA

5.0V 32500 - -

– Tiny Pager MotorTiny Pager Motor by by SolarboticsSolarbotics

– Diameter = 4mm (0.158”)Diameter = 4mm (0.158”)– Length = 16.4mm (0.65”)Length = 16.4mm (0.65”)– Shaft Diameter = 0.66mm Shaft Diameter = 0.66mm

(0.026”)(0.026”)– Weight = 1g (.035oz)Weight = 1g (.035oz)

Great Planes ElectriFly 4Ch FM Rx 72MHz

Futaba FM Receiver Crystal Short R114F 72MHz High

Hitec Eclipse 7 7-Channel FM/4

Component SelectionComponent Selection

Battery: 110mAh 1S 3.7V LiPo: BMCX

Servos:

- Currently, servos scavenged from the E-Flite Microflyer will be used.

- Piezo-electrics were researched, but would require more power than we could supply.

Component SelectionComponent Selection

Wing Material SelectionWing Material Selection

- McMaster Polyester (PET) FilmMcMaster Polyester (PET) Film - Thickness: .001“Thickness: .001“- Width: 40“Width: 40“- Length: 10' Length: 10' - Tensile Strength: 28,000 psiTensile Strength: 28,000 psi- Clear, No Tint, Weather ResistantClear, No Tint, Weather Resistant

““Bones” Material SelectionBones” Material Selection

- McMaster Rigid Carbon Fiber Shape Round McMaster Rigid Carbon Fiber Shape Round TubeTube

- OD: .125“OD: .125“- ID: .074" ID: .074" - Length: 48" Length: 48" - Tensile Strength: 120,000 psiTensile Strength: 120,000 psi

11 Rudder used for TurningRudder used for Turning

22 Rudder used for increasing/decreasing Rudder used for increasing/decreasing pitchpitch

33 Top WingTop Wing

44 Bottom Wing with rod attachment Bottom Wing with rod attachment pointspoints

55 Base Frame structureBase Frame structure

66 MotorMotor

77 GearGear

88 Rod linkagesRod linkages

99 Pinion GearPinion Gear

1010 Rocker / Wing HolderRocker / Wing Holder

ConclusionConclusion

Future PlansFuture Plans

– Find Torque on the ShaftFind Torque on the Shaft

– ResizingResizing

– Find appropriate ServosFind appropriate Servos

– Finalize Design Calculations Finalize Design Calculations

– Finalize Manufacturing PlansFinalize Manufacturing Plans

Questions?Questions?