Download Group 1 System Definition Review presentation

System Definition Review
Miguel Alanis
Tim Block
Becca Dale
Joseph Fallon
Purdue University
AAE 451 Senior Design Team 1
Aaron Mayne
Jason Olmstead
Adeel Soyfoo
Sarah Weise
1
Review of Market
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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
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AAE 451 Senior Design Team 1
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Design Requirements
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Passengers: 12 (including crew)
Cruise Speed: 160 kts
Takeoff distance: 2000 ft
Range: 1200 nm
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One-way full load
Weight: approx. 12,000 lbs
Cost: < $2.5 million
Alternate Fuel Source: Fischer-Tropes Kerosene and Bio Kerosene
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AAE 451 Senior Design Team 1
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Trade Studies
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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.
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AAE 451 Senior Design Team 1
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Trade Studies
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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.
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AAE 451 Senior Design Team 1
5
Concept Generation and Selection
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Concept 4
Concept 5
s
-
-
-
Cargo Access
+
s
s
-
s
Passenger Space
s
s
s
-
s
Passenger Comfort
+
s
+
+
+
Weight
-
s
-
-
-
Ruggedness
-
s
-
-
-
Conrtolability
+
s
+
+
s
Pilot's View area
+
s
-
-
+
Safety
s
s
s
-
s
Manufacturability
-
s
-
-
-
Development cost
-
s
s
-
s
Wing Design/Configuration
+
+
+
+
+
Tail Configuration
+
+
s
s
s
Fuselage Drag
-
s
s
-
s
Engine Placement
+
s
s
+
+
Landing Gear
+
s
s
-
+
Datum
Concept 3
-
Plus
8
2
3
4
5
Same
2
14
8
1
7
Minus
6
0
5
11
4
AAE 451 Senior Design Team 1
Grand
Caravan
Concept 2
Maintenance Access
Concept 6
Concept 1
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Criteria
Pugh’s Method 1
7
Pugh’s Method 2
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AAE 451 Senior Design Team 1
8
Three Selections
1
3
2
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AAE 451 Senior Design Team 1
9
Cabin Size 1
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Two rows of seats:
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22’10” long x 5’2-1/2” wide x
5’6” tall
Possible configurations:
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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
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Cabin Size 2
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Three rows of seats (high
Density):
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16’10” long x 5’10” wide x 5’6”
tall
Possible configurations:
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9 Passengers
12 Passengers
1-10’5” container
1-5’2” container and 6 seats
2-5’2”containers
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AAE 451 Senior Design Team 1
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Cabin Size 3
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Three rows of seats (low density):
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18’5” long x 5’10” wide x 5’6”
tall
Possible Configurations:
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9 Passengers
12 Passengers
1-10’5” container
1-5’2” container and 6 seats
2-5’2” containers
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AAE 451 Senior Design Team 1
12
Fuel & Engine Choice
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Engine Choice:
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Fuel Choice:
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Turboprop
FT Kerosene
Bio Kerosene
Specific Fuel Consumption
Flight Condition Cbhp
Cruise
Loiter
0.5
0.6
Current SFC values of
Turboprops are reasonable for
current design stage
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AAE 451 Senior Design Team 1
13
Performance Constraints
Sealevel Takeoff
0.25
5000ft altitude Takeoff on a Hot Day
Sealevel Cruise
Power to Weight Ratio (hp/lb)
0.2
10000 ft altitude cruise
0.15
Sealevel Climb
10000 ft altitude climb
0.1
15000 ft cruise
Emergency Landing at 5000ft altitude
on an Icy Runway
0.05
Emergency Landing at 5000ft altitude
on an Icy Runway With Fuel Dump
Option
Emergency Landing at 5000ft altitude
on a Hot Day
0
0
10
20
30
40
50
60
70
Wing Loading (lb/ft^2)
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AAE 451 Senior Design Team 1
80
Comparison Aircraft Design Points
14
Characteristics of Aircraft
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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
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Comparison With Competing Aircraft
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Current Design
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Max Range @ 2000 lbs:
1200 nm
Cabin Size (LxHxW):
22.8’x5.5’x5.2’
GTOW: 12100 lbs
S: 288 ft2
b: 53.6 ft
Engine Power: 1275 shp
Takeoff Distance: 2,000 ft
Cost(2006): $2.35 million
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Cessna Grand Caravan
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Max Range @ 2000lbs:
850 nm
Cabin Size (LxHxW):
16.7’x4.3’x5.2’
GTOW: 8,750 lbs
S: 279.4 ft2
b: 52.1ft
Engine Power: 675 shp
Takeoff Distance: 2,420 ft
Cost(2006): $2.5 million
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Questions?
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Extra:Representative Design Mission
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0-1
1-2
2-3
3-4
4-5
6-7
Taxi & Takeoff
Climb
Cruse
Descend
Loiter
Attempt to land
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7-8 Climb
8-9 Divert
9-10 Descend
10-11 Loiter
12-13 Land
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Wing Design
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NACA 4412 section
Cruise angle of attack – 2.5 – 4.5 degrees
Cruise altitude – 10000 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
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AAE 451 Senior Design Team 1
19