The Owl

Rensselaer Polytechnic InstituteMay 10th, 2016

Gabriel BenarrochAdrianne KunkelCal Manjunath

Kathleen McGuigan

OverviewMotivation

Design Requirements

Analysis & Subsystems

Aircraft Noise

Engine Selection

Wing Selection

Wingtips

Tail Selection

Materials Selection

Interior Selections

Final Design

Future Steps

Questions

Improve Public Perception of Aircraft & the Aviation Industry

Motivation

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!

Design RequirementsCapacity: 174 passengers, 5 crewRange: at least 7000 kmCruise speed: 0.8 MNoise level: 15 dB improvement from 118 dB

Weight EstimationMaximum Takeoff Weight: 82,200 kg

Empty Weight: 42,500 kg

Maximum Fuel Weight: 16,900 kg

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.

Aircraft Noise Research & Data .

Average sound interference from A320 aircraftAverage sound without interference from aircraft

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

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

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

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°

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

Materials Selection - Composites

Factors Aluminum Composites

Cost +1 -1

Strength 0 +1

Weight -1 +1

Overall 0 +1

Boeing 787

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

Final Design

Future Steps● More in Depth Materials Selection

● FEA/CFD

● Structural Components

● More improvements focusing on air pollution

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.

Questions?