System Requirements Review

System Requirements Review

New Environmentally

Responsible DesignNayanapriya Bohidar

Alex FickesAnthony Malito

Keyur PatelDanielle Woehrle

Matt Dienhart

Dean JonesRicardo Mosqueda

Dustin Souza

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Outline

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Mission Statement

Market

Competition

Concept of Operations

Design Requirements

Design Comparison

New Technologies and Advanced Concepts

Sizing Code

Summary

Mission StatementTo design an environmentally responsible aircraft for the twin aisle commercial transport market with a capacity of 300+ passengers, NASA’s N+2 capabilities, and an entry date of 2020-2025.

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NASA’s N+2 technology benefits include: Reducing cumulative noise by 42dB below Stage 4 Reducing take-off and landing NOx emissions to 75% below

CAEP6 levels Reducing fuel burn by 50% relative to “large twin-aisle

performance” (777-200LR) Reducing field length by 50% relative to the

large twin-aisle

Market

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Twin-aisle aircraft represent the fastest-growing market segment

Growth fueled by emerging economies (Asia-Pacific, Latin America, Middle East, etc.)

Image Source: Boeing Market Forecast

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Asia-Pacific, Middle East, Latin America

Low Cost Carriers (LCC’s)

Passengers looking for cheap hub-to-hub and nonstop flights

Airliners looking for high capacity aircraft to meet increasing market demand

Customers

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Competition

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High-Speed Rail Systems

Boeing 737, Airbus A319

Image Source:www.hasea.com

Map of proposed high-speed rail

systems in China, along with estimated

travel times from Beijing

Operational City Pairs

Concept of Operations

Runway Length (ft) Flight Time (Min)

Origin Destination Origin DestinationRoute

Distance (nmi)

0.75Mach

0.85Mach

Tokyo, Japan

Sapporo,Japan

8,202 9,843 593.91 101.91 93.45

Seoul, South Korea

Jeju, South Korea

10,499 9,843 323.86 69.21 64.60

Sydney, Australia

Melbourne, Australia

8,301 11,998 509.89 91.73 84.47

Beijing, China

Shanghai,China

10,499 10,827 779.22 124.35 113.25

Hong Kong,China

Taipei, Taiwan

12,467 10,991 580.10 100.24 91.97

Tokyo, Japan

Naha, Japan

8,202 9,843 803.39 127.27 115.83

8Reference: Centre for Asia Pacific Aviation

Design Mission 400 Passengers (Max Payload) 4,000 nmi Range

(Tokyo-NHD to New Delhi-DEL: 3,200nmi)

Runway Length 8,300 ft (Takeoff)

Concept of Operations

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200 nmi4000 nmi

Design Requirements

Requirement Threshold TargetCruise Mach 0.75 0.85

Range 3,000 nmi 4,000 nmi

Field Length 8,300 ft 5,800 ft

Fuel Burn 33% reduction 50% reduction

NOx Emissions 50% below CAEP 6 75% below CAEP 6

Noise Reduction-32 dB

(cum. below Stage 4)-42 dB

(cum. below Stage 4)Pax Capacity 350 400

*Reference Vehicle B737-700

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Design Comparison

Requirement Target Design B767-300 B777-200 B737-700

Cruise Mach 0.85 0.85 0.84 0.785

Range 4,000 nmi 3,780 nmi 5,240 nmi 3,440

Field Length 5,800 ft. 7,907 ft. 8,202 ft. 8,300 ft.

Pax Capacity 400 350 440 149

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Reference: Boeing.com

Geared Turbofan Unducted Fan (UDF) Bio-Diesel

Trailing Edge Brushes Blended Wing Body Spiroid Winglets

New Technologies and Advanced Concepts

PROPULSION

AERODYNAMICS

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Fly By Wireless Morphing Trailing Edge

Composites Bonded Skin Panels

DYNAMICS & CONTROLS

STRUCTURES

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New Technologies and Advanced Concepts

Sizing Code Progress We used three sizing codes:

Simple – Incorporates design mission range, (L/D)max and number of passengers

Initial – Incorporates all of the above in addition to T/W and W0/S ratios.

MATLAB – Incorporates all of the above and the entire design mission (i.e. loiter time, emergency landing etc.)

Sizing codes usedBoeing 767 - 200ER with CF6-80C2B7F engines: Simple Initial MATLAB

Actual Calculated Error Calculated Error Calculated ErrorW0 (Maximum Takeoff Gross Weight) [lb] 395,000 383,375 -2.94% 389,861 -1.30% 546,580 38%We (Empty Weight) [lb] 184,400 195,300 5.91% 202,484 9.81% 252,340 37%

W f (Fuel Weight) [lb] - 122,275 - 121,576 - 243,550 -

Airbus A330 - 200 with CF6-80E1A2 engines: Simple Initial MATLABActual Calculated Error Calculated Error Calculated Error

W0 (Maximum Takeoff Gross Weight) [lb] 507,050 493,299 -2.71% 502,105 -0.98% 563,040 11%We (Empty Weight) [lb] 263,075 241,182 -8.32% 256,006 -2.69% 259,480 -1%W f (Fuel Weight) [lb] - 176,216 - 170,198 - 245,840 -

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Summary

Market forecasts predict a need for higher capacity aircraft to fly heavily trafficked routes

400 passenger, 4000 nmi range, N+2 compliant aircraft scheduled for deployment in 2020-2025

Next Steps Constraint Analysis Sizing code refinement Acquire Propulsion systems data Preliminary wing design

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