Initial Concept Proposed by Virginia Tech and Loughborough University to meet requirements stipulated by NAVAIR Background Annual collaboration project Virginia Tech Loughborough University August 2007 May 2008 ID: 356802
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Collaborative Conceptual Design of a U.A.V
Initial Concept Proposed by Virginia Tech and Loughborough University to meet requirements stipulated by NAVAIRSlide2
Background
Annual collaboration project
Virginia Tech
Loughborough UniversityAugust 2007 – May 2008 Specified by NAVAIR
Slide3
Team Members
Virginia Tech
Robert Briggs
Philip PesceAmanda Chou
Anthony RicciardiJessica McNeilusErik SundayMegan Prince
Ricky DuelleyBelle BredehoftMichael ShermanAlex KovacicDennis Preus
Loughborough University
Daniel Marshall
Daniel Jones
Kris Hanna
Rob Noble
Craig Dillon
Peter Christie
Rob Penn
Steve Bennett
Andrew Courtneidge
Balraj Chand
Ben Hanson
Alex HumphreySlide4
Brief
To design, build and test an unmanned surveillance vehicle, that can perform the following:
Cruise speed of 50 kt (knots)
Top Speed of 70 ktRange of 15 nm (nautical miles)Minimum endurance of eight hours
Service ceiling of 10,000 ft at half fuelNormal operational altitude of 3000 ft or 2000 ft above ground level (AGL)Minimum turn rate of 6 degrees per second
Climb rate of at least 200 ft/min at sea level
Maximum Gross Take-Off Weight (MGTOW) of 300 lbs
Minimum payload of 30 lbs (45 lbs desired)
Payload power source of 10 watts
Noise levels below 50 dBA at 200 ft.
All weather operation with a 10 kt crosswind landing capability
Capable of rail catapult pneumatic launch
Landing within a 50 ft x 250 ft parking lot
Less than one flight failure per 100,000 hours of flight
GPS based autonomous operations
Dynamic re-tasking from ground controllersSlide5
Competitors
Outrider 385lbs (175kg)
Pioneer 450lbs (204kg)
Shadow 375lbs (170kg)
Watchkeeper 430lbs (195kg)Slide6
Methodology
Virginia Tech
Broke into two groups and developed two separate concepts.
Loughborough UniversityDeveloped two concepts as a group.Met, and decided on a concept as a whole.Slide7
Concepts
Twin Boom
Conventional H-tail
Pylon Mounted PropSlide8
Concepts
Interchangeable Parts
Standard Wing
TailsWing LocationAuxiliary PowerSlide9
Concepts
Critical Points
Complexity of Design
NoiseC of GSafetyEngine Type (Pusher vs. Puller)
Engine PlacementThrust LineLaunch & LandingPropeller ProtectionWeightSlide10
Downselection
List Advantages & Disadvantages
Eliminated Twin Tail Boom
Discussed in Smaller GroupsChose PylonSuggested ModificationsSlide11
Downselection
Due to:
Noise
Prop ProtectionDiversity of Options
CoolingMaintenanceModificationsWing Placement
Tractor vs. PusherConventional TailSlide12
Final Concept
Assembled by Parts
Fuselage & Pylon
Wing LocationTail & EmpennageEngine OrientationUndercarriageSlide13
Final ConceptSlide14
General ArrangementSlide15
Key Features
Good access for maintenance
Large internal fuselage volume
Proven Design
High aspect ratio wing
Modular assembly
Simple structure for design and manufactureSlide16
Reliability
Addressed as a key issue.
- 1 or less uncontrolled crashes per 100,000 hours
Methods to determine Reliability - FMEA/FMECA & FTA Fussell-Vessely – prioritises importance of sub-systemsSlide17
TimelineSlide18
Work Breakdown
Task
Team Member(s)
Structures/Manufacturing
Rob Penn, Ricky Duelley
Propulsion
Daniel Jones, Dennis Preus
Reliability
Erik Sunday, Balraj Chand
Aerodynamics
Anthony
Ricciardi, Ben Hanson
Performance
Steve Bennett, Megan Prince
Stability/ Control
Andy
Courtneidge, Peter Christie, Phil Pesce
CAD
Alex
Kovacic, Alex Humphrey, Michael Sherman
Systems Integration
Belle
Bredehoft, Rob Noble
Costs
Jessica
McNeilus, Kris Hanna
Ground Support
Craig Dillon, Robert Briggs
Leadership/Planning
Daniel Marshall, Amanda ChouSlide19
Questions?