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INTERNATIONAL DESIGN TEAM 2008 1
Collaborative Conceptual Design of a U.A.V
Initial Concept Proposed by Virginia Tech and Loughborough University to
meet requirements stipulated by NAVAIR
INTERNATIONAL DESIGN TEAM 2008 2
Background
• Annual collaboration project– Virginia Tech – Loughborough University
• August 2007 – May 2008 • Specified by NAVAIR
INTERNATIONAL DESIGN TEAM 2008 3
Team MembersVirginia Tech• Robert Briggs• Philip Pesce• Amanda Chou• Anthony Ricciardi• Jessica McNeilus• Erik Sunday• Megan Prince• Ricky Duelley• Belle Bredehoft• Michael Sherman• Alex Kovacic• Dennis 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 Humphrey
INTERNATIONAL DESIGN TEAM 2008 4
BriefTo design, build and test an unmanned surveillance vehicle, that can perform the
following:
– Cruise speed of 50 kt (knots)– Top Speed of 70 kt– Range of 15 nm (nautical miles)– Minimum endurance of eight hours– Service ceiling of 10,000 ft at half fuel– Normal 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 controllers
INTERNATIONAL DESIGN TEAM 2008 5
Competitors
Outrider 385lbs (175kg)Pioneer 450lbs (204kg)
Shadow 375lbs (170kg) Watchkeeper 430lbs (195kg)
INTERNATIONAL DESIGN TEAM 2008 6
Methodology
• Virginia Tech– Broke into two groups and developed two
separate concepts.• Loughborough University
– Developed two concepts as a group.• Met, and decided on a concept as a whole.
INTERNATIONAL DESIGN TEAM 2008 7
Concepts
Twin Boom Conventional H-tail
Pylon Mounted Prop
INTERNATIONAL DESIGN TEAM 2008 8
Concepts
• Interchangeable Parts– Standard Wing– Tails– Wing Location– Auxiliary Power
INTERNATIONAL DESIGN TEAM 2008 9
Concepts
• Critical Points– Complexity of Design– Noise– C of G– Safety– Engine Type (Pusher vs. Puller)– Engine Placement
• Thrust Line– Launch & Landing– Propeller Protection– Weight
INTERNATIONAL DESIGN TEAM 2008 10
Downselection
• List Advantages & Disadvantages– Eliminated Twin Tail Boom
• Discussed in Smaller Groups– Chose Pylon– Suggested Modifications
INTERNATIONAL DESIGN TEAM 2008 11
Downselection• Due to:
– Noise– Prop Protection– Diversity of Options– Cooling– Maintenance
• Modifications– Wing Placement– Tractor vs. Pusher– Conventional Tail
INTERNATIONAL DESIGN TEAM 2008 12
Final Concept
• Assembled by Parts– Fuselage & Pylon– Wing Location– Tail & Empennage– Engine Orientation– Undercarriage
INTERNATIONAL DESIGN TEAM 2008 13
Final Concept
INTERNATIONAL DESIGN TEAM 2008 14
General Arrangement
INTERNATIONAL DESIGN TEAM 2008 15
Key
Feat
ures
Good access for maintenance
Large internal fuselage volume
Proven Design
High aspect ratio wing
Modular assembly
Simple structure for design and manufacture
INTERNATIONAL DESIGN TEAM 2008 16
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-systems
INTERNATIONAL DESIGN TEAM 2008 17
Timeline
INTERNATIONAL DESIGN TEAM 2008 18
Work BreakdownTask Team Member(s)Structures/Manufacturing Rob Penn, Ricky DuelleyPropulsion Daniel Jones, Dennis PreusReliability Erik Sunday, Balraj ChandAerodynamics Anthony Ricciardi, Ben HansonPerformance Steve Bennett, Megan PrinceStability/ Control Andy Courtneidge, Peter Christie, Phil
PesceCAD Alex Kovacic, Alex Humphrey, Michael
ShermanSystems Integration Belle Bredehoft, Rob NobleCosts Jessica McNeilus, Kris Hanna
Ground Support Craig Dillon, Robert BriggsLeadership/Planning Daniel Marshall, Amanda Chou
INTERNATIONAL DESIGN TEAM 2008 19
Questions?
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