1. The Owl
Rensselaer Polytechnic Institute
May 10th, 2016
Gabriel Benarroch
Adrianne Kunkel
Cal Manjunath
Kathleen McGuigan

2. Overview
Motivation
Design Requirements
Analysis & Subsystems
Aircraft Noise
Engine Selection
Wing Selection
Wingtips
Tail Selection

3. Improve Public Perception of Aircraft & the Aviation Industry
Motivation

4. Public Complaints
Complaints focus on the airport as well as the plane itself
Controversial Topics
Noise
Negative Health Effects
Physical
Physcological
Fuel Conservation
Air Pollution
Climate Change

5. Design Requirements
Capacity: 174 passengers, 5 crew
Range: at least 7000 km
Cruise speed: 0.8 M
Noise level: 15 dB improvement from 118 dB

6. Weight Estimation
Maximum Takeoff Weight: 82,200 kg
Empty Weight: 42,500 kg
Maximum Fuel Weight: 16,900 kg

7. Aircraft Noise Research & Data
Medical Effects of a DNL(dBA) of:
45-50 Interruption of Sleep
50-60 Speech Interference
65-75 Extra Auditory Physiological effects
75-85 Minor Hearing Loss
dB Sound Level: The dB is a logarithmic way of describing a sound pressure ratio.
DNL: scale of measuring the average dB level while weighing night noise heavier.
Acceptable dBA w/o Significant Complaints
Day dBA: < 55
Night dBA: < 45
OSHA Suggests <90 dB for 8 hours a day.

8. Aircraft Noise Research & Data
.
Average sound interference from A320 aircraftAverage sound without interference from aircraft

9. Engine Selection - Geared Turbofan
Factors Turbofan GTF LEAP Propfan
Noise 0 +1 0 -1
Fuel
Efficiency
-1 +1 0 +1
Emissions 0 +1 +1 +1
Total -1 +3 +1 +1

10. Color Intensity (dB)
Pink 100
Orange 90
Yellow 80
Green 70
Noise contour for typical turbofan
Lo-L1=20log(R1/Ro)
10^(Lo-L1/20)=R1/Ro
Geared Turbofan Engine Noise Research & Data
Noise contour for geared turbofan

11. Wingtip and Airfoil Selection
Factor Normal Winglets Raked
Lift 0 +1 0
Drag 0 +1 +1
Style -1 +1 +1
Range 0 -1 +1
Overall -1 +2 +3
SC(2)-0710
Raked
Wingtips

12. Wing Dimensions
Wing surface area = 144.8 m^2
Aspect ratio = 9
Span = 36.11 m
Average chord = 4.01 m
Quarter chord sweep = 30°

13. Tail Selection - V-Tail
A V tail design was chosen in order for
the plane to be distinguishable from
other similar planes
Surface area of the tail = 47.6 m^2
Span = 13.8 m
Average chord = 3.45 m
Tail control surface area = 9.75 m^2

14. Materials Selection - Composites
Factors Aluminum Composites
Cost +1 -1
Strength 0 +1
Weight -1 +1
Overall 0 +1
Boeing 787

15. Interior Selection
29 rows, 174 passengers
20” width, 36” seat pitch
Leaves room for ~30-35” aisle
Brings cabin width to 4m
Larger seat pitch and more seats bring
fuselage length to 41.67 m

16. Final Design

17. Future Steps
● More in Depth Materials Selection
● FEA/CFD
● Structural Components
● More improvements focusing on air pollution

18. Sources
http://www.boeing.com/commercial/aeromagazine/articles/qtr_4_06/article_04_2.html
http://ehp.niehs.nih.gov/1307272/
http://link.springer.com/chapter/10.1007/978-3-642-66082-5_7#page-1
http://www.scottsdaleaz.gov/Asset110.aspx
http://www.landmarkresearch.com/Articles/PDF/AirportNoise.pdf> in refs
http://www.aef.org.uk/uploads/PlanningGuide2.pdf> in refs
http://www.fzt.haw-hamburg.de/pers/Scholz/Airport2030/Airport2030_TN_Supercritical_Airfoils_11-12-21.pdf
https://upload.wikimedia.org/wikipedia/en/5/5e/Plane_Stupid_logo.jpg
http://www.plane-mad.com/
https://theboystravelblog.files.wordpress.com/2010/02/aircraft_comparisons.jpg
http://propfan.net/turbodir.html
http://www.patentbuddy.com/Patent/6089502
http://theflyingengineer.com/flightdeck/pw1100g-gtf
http://www.boeing.com/commercial/aeromagazine/articles/qtr_4_06/images/article_04_chart1.gif
http://i.cdn.turner.com/money/infographic/luxury/how-do-airlines-legroom-compare/assets/legroom-anim-030116.gif
Raymer, Daniel P. Aircraft Design: A Conceptual Approach. 5th ed. Reston, Virginia: American Institute of Aeronautics and Astronautics,
2012. Print. AIAA Education Ser.

19. Questions?