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System Definition Review
Miguel Alanis Aaron Mayne Tim Block Jason Olmstead Becca Dale Adeel Soyfoo Joseph Fallon Sarah Weise Purdue University AAE 451 Senior Design Team 1
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Review of Market Air charters, governments (surveying, mail), medical transport, or supplies delivery companies Operates in rural, developing area’s of the world such as Australia, South America, or even rural parts of Canada Purdue University AAE 451 Senior Design Team 1
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Design Requirements Passengers: 12 (including crew)
Cruise Speed: 160 kts Takeoff distance: 2000 ft Range: 1200 nm One-way full load Weight: approx. 12,000 lbs Cost: < $2.5 million Alternate Fuel Source: Fischer-Tropes Kerosene and Bio - Kerosene Purdue University AAE 451 Senior Design Team 1
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Trade Studies Largest Tradeoffs are Payload (passengers) or Range
Payload and/or Range affect GTOW the most Solid Lines are for Round trip range; Dotted Lines for One Way Range. Purdue University AAE 451 Senior Design Team 1
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Trade Studies For the desired payload and range, there are only certain speeds the plane can travel Solid Lines are for Round trip range; Dotted Lines for One Way Range. Purdue University AAE 451 Senior Design Team 1
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Concept Generation and Selection
Purdue University AAE 451 Senior Design Team 1
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Pugh’s Method 1 Purdue University AAE 451 Senior Design Team 1
Criteria Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6 Grand Caravan Maintenance Access - s Datum Cargo Access + Passenger Space Passenger Comfort Weight Ruggedness Conrtolability Pilot's View area Safety Manufacturability Development cost Wing Design/Configuration Tail Configuration Fuselage Drag Engine Placement Landing Gear Plus 8 2 3 4 5 Same 14 1 7 Minus 6 11 Purdue University AAE 451 Senior Design Team 1
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Pugh’s Method 2 Purdue University AAE 451 Senior Design Team 1
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Three Selections 1 3 2 Purdue University AAE 451 Senior Design Team 1
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Cabin Size 1 Two rows of seats: Possible configurations:
22’10” long x 5’2-1/2” wide x 5’6” tall Possible configurations: 10 Passengers 1-10’5” container and 4 seats 1-5’2” container and 6 or 8 seats 2-5’2” containers and 4 seats 3-5’2” containers Purdue University AAE 451 Senior Design Team 1
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Cabin Size 2 Three rows of seats (high Density):
16’10” long x 5’10” wide x 5’6” tall Possible configurations: 9 Passengers 12 Passengers 1-10’5” container 1-5’2” container and 6 seats 2-5’2”containers Purdue University AAE 451 Senior Design Team 1
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Cabin Size 3 Three rows of seats (low density):
18’5” long x 5’10” wide x 5’6” tall Possible Configurations: 9 Passengers 12 Passengers 1-10’5” container 1-5’2” container and 6 seats 2-5’2” containers Purdue University AAE 451 Senior Design Team 1
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Fuel & Engine Choice Engine Choice: Fuel Choice:
Turboprop Fuel Choice: FT Kerosene Bio Kerosene Current SFC values of Turboprops are reasonable for current design stage Purdue University AAE 451 Senior Design Team 1
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Performance Constraints
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Characteristics of Aircraft
GTOW: 12,100 lbs S: 288 ft2 b: 53.6 ft P/W: 0.095 W/S: 42 lbs/ft2 dto: 2,000 ft VCruise: 180 kts Acquisition Cost: $2.327 million Purdue University AAE 451 Senior Design Team 1
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Comparison With Competing Aircraft
Current Design Max 2000 lbs: 1200 nm Cabin Size (LxHxW): 22.8’x5.5’x5.2’ GTOW: lbs S: 288 ft2 b: 53.6 ft Engine Power: 1275 shp Takeoff Distance: 2,000 ft Cost(2006): $2.35 million Cessna Grand Caravan Max 2000lbs: 850 nm Cabin Size (LxHxW): 16.7’x4.3’x5.2’ GTOW: 8,750 lbs S: ft2 b: 52.1ft Engine Power: 675 shp Takeoff Distance: 2,420 ft Cost(2006): $2.5 million Purdue University AAE 451 Senior Design Team 1
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Questions? Purdue University AAE 451 Senior Design Team 1
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Extra:Representative Design Mission
Taxi & Takeoff Climb Cruse Descend Loiter Attempt to land Climb Divert Descend 10-11 Loiter 12-13 Land Purdue University AAE 451 Senior Design Team 1
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Wing Design NACA 4412 section
Cruise angle of attack – 2.5 – 4.5 degrees Cruise altitude – feet Lift coefficient at cruise : 0.2 ~ 0.3 Effective lifting area – 65% actual wing area Average weight during cruise = .88*take-off weight Take-off speed = 1.2*stall speed Purdue University AAE 451 Senior Design Team 1
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