ae446 introduction to helicopter aerodynamics and designae446/17/ae 446 introduction_class.pdf ·...
TRANSCRIPT
![Page 1: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/1.jpg)
Dr.Ilkay Yavrucuk Spring 2015
AE446 Introduction to Helicopter Aerodynamics and Design
Dr. Ilkay Yavrucuk METU, Dept. of AE
Spring 2015
![Page 2: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/2.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Why do we need helicopters?
![Page 3: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/3.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 4: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/4.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 5: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/5.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 6: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/6.jpg)
Dr.Ilkay Yavrucuk Spring 2015
This is why…
![Page 7: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/7.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Earliest Helicopter.. Chinese Top
![Page 8: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/8.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Leonardo da Vinci (1480? 1493?)
![Page 9: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/9.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Human Powered Flight?
HP 6.7 5.33/0.8 Merit of rePower/Figu Ideal Power Actual
33.5A2
W WPower Ideal
slugs. 0.00238Desnitysq.ft 100 AreaRotor
6ft ~RadiusRotor 160lbfWeight
==
=
==
=
=
=
HPρ
![Page 10: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/10.jpg)
Dr.Ilkay Yavrucuk Spring 2015
D’AmeCourt (1863) Steam-Propelled Helicopter
![Page 11: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/11.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Paul Cornu (1907) First man to fly in helicopter mode..
![Page 12: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/12.jpg)
Dr.Ilkay Yavrucuk Spring 2015
De La Cierva invented Autogyros (1923)
![Page 13: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/13.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Cierva introduced hinges at the root that allowed blades to freely flap
Hinges
Only the lifts were transferred to the fuselage, not unwanted moments. In later models, lead-lag hinges were also used to Alleviate root stresses from Coriolis forces
![Page 14: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/14.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Igor Sikorsky Started work in 1907, Patent in 1935
Used tail rotor to counter-act the reactive torque exerted by the rotor on the vehicle.
![Page 15: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/15.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 16: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/16.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Sikorsky’s R-4
![Page 17: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/17.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Ways of countering the Reactive Torque
Other possibilities: Tip jets, tip mounted engines
![Page 18: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/18.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Single Rotor Helicopter
![Page 19: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/19.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Tandem Rotors (Chinook)
![Page 20: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/20.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Coaxial rotors Kamov KA-52
![Page 21: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/21.jpg)
Dr.Ilkay Yavrucuk Spring 2015
NOTAR Helicopter
![Page 22: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/22.jpg)
Dr.Ilkay Yavrucuk Spring 2015
NOTAR Concept
![Page 23: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/23.jpg)
Dr.Ilkay Yavrucuk Spring 2015
Tilt Rotor Vehicles
![Page 24: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/24.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 25: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/25.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 26: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/26.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 27: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/27.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 28: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/28.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 29: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/29.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 30: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/30.jpg)
Dr.Ilkay Yavrucuk Spring 2015
![Page 31: AE446 Introduction to Helicopter Aerodynamics and Designae446/17/AE 446 Introduction_class.pdf · 2017. 3. 13. · Dr.Ilkay Yavrucuk Spring 2015 AE446 Introduction to Helicopter Aerodynamics](https://reader035.vdocument.in/reader035/viewer/2022071414/610e7bd6ae01886796643f57/html5/thumbnails/31.jpg)
Dr.Ilkay Yavrucuk Spring 2015