Download - The Owl - Final Presentation
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The Owl
Rensselaer Polytechnic InstituteMay 10th, 2016
Gabriel BenarrochAdrianne KunkelCal Manjunath
Kathleen McGuigan
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OverviewMotivation
Design Requirements
Analysis & Subsystems
Aircraft Noise
Engine Selection
Wing Selection
Wingtips
Tail Selection
Materials Selection
Interior Selections
Final Design
Future Steps
Questions
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Improve Public Perception of Aircraft & the Aviation Industry
Motivation
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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
Environmental Impacts
Customer Experience
NYC’s Airports had 21,000 complaints in 2014
La-Guardia Airport received 1,360 Complaints in 2014 from one street alone!
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Design RequirementsCapacity: 174 passengers, 5 crewRange: at least 7000 kmCruise speed: 0.8 MNoise level: 15 dB improvement from 118 dB
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Weight EstimationMaximum Takeoff Weight: 82,200 kg
Empty Weight: 42,500 kg
Maximum Fuel Weight: 16,900 kg
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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: < 55Night dBA: < 45
OSHA Suggests <90 dB for 8 hours a day.
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Aircraft Noise Research & Data .
Average sound interference from A320 aircraftAverage sound without interference from aircraft
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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
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Color Intensity (dB)
Pink 100
Orange 90
Yellow 80
Green 70
Noise contour for typical turbofanLo-L1=20log(R1/Ro)
10^(Lo-L1/20)=R1/Ro
Geared Turbofan Engine Noise Research & Data
Noise contour for geared turbofan
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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
RakedWingtips
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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°
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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
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Materials Selection - Composites
Factors Aluminum Composites
Cost +1 -1
Strength 0 +1
Weight -1 +1
Overall 0 +1
Boeing 787
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Interior Selection29 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
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Final Design
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Future Steps● More in Depth Materials Selection
● FEA/CFD
● Structural Components
● More improvements focusing on air pollution
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Sourceshttp://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-1http://www.scottsdaleaz.gov/Asset110.aspxhttp://www.landmarkresearch.com/Articles/PDF/AirportNoise.pdf> in refshttp://www.aef.org.uk/uploads/PlanningGuide2.pdf> in refshttp://www.fzt.haw-hamburg.de/pers/Scholz/Airport2030/Airport2030_TN_Supercritical_Airfoils_11-12-21.pdfhttps://upload.wikimedia.org/wikipedia/en/5/5e/Plane_Stupid_logo.jpghttp://www.plane-mad.com/https://theboystravelblog.files.wordpress.com/2010/02/aircraft_comparisons.jpghttp://propfan.net/turbodir.htmlhttp://www.patentbuddy.com/Patent/6089502http://theflyingengineer.com/flightdeck/pw1100g-gtfhttp://www.boeing.com/commercial/aeromagazine/articles/qtr_4_06/images/article_04_chart1.gifhttp://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.
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Questions?