a brief history of military avionics - sftentx.comsftentx.com/files/78637159.pdf · i n t e g r i t...

59
Slide 1 of 59 AIR FORCE FLIGHT TEST CENTER Margaret “Peggy” Swassing 775 TS/ENVS 3 September 2013 [email protected] I n t e g r i t y - S e r v i c e - E x c e l l e n c e This Briefing is: UNCLASSIFIED War-Winning Capabilities … On Time, On Cost A Brief History of Military Avionics

Upload: hoangkhuong

Post on 20-Apr-2018

217 views

Category:

Documents


3 download

TRANSCRIPT

Page 1: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 1 of 59

AIR FORCE FLIGHT TEST CENTER

Margaret “Peggy” Swassing

775 TS/ENVS

3 September 2013

[email protected]

I n t e g r i t y - S e r v i c e - E x c e l l e n c e

This Briefing is:

UNCLASSIFIED

War-Winning Capabilities … On Time, On Cost

A Brief History of

Military Avionics

Page 2: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 2 of 59

AVIATION ELECTRONICS AVIATION + ELECTRONICS = AVIONICS

Avionics

Avionics are the electronic systems used on aircraft, spacecraft, and artificial satellites

• Communications, navigation, and identification (CNI)

• Mission Sensors

• Mission computing and data communications

• Weapons and stores carriage and release

• Human-Machine Interface

Page 3: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 3 of 59

Avionics

Page 4: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 4 of 59

• The Wright Flyer taking off on its historic first flight – December 17, 1903, at 10:35 a.m. – Kill Devil Hill, near Kitty Hawk, North Carolina

• Instruments on board: – Anemometer to measure wind speed – Stopwatch to time the duration of flight – “Veedor” engine-revolutions counter to measure engine rpm

Early Days of Flight

Page 5: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 5 of 59

Page 6: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 6 of 59

Orville(left) & Wilbur with the Wright Flyer II at Huffman Prairie May 1904.

Page 7: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 7 of 59

Early Days of Flight

• Instruments

• Radio

– Morse Code

– Early Countermeasures

– Voice

– Navigation Aids

– Radio-controlled (remotely piloted) aircraft

• Autopilot (gyroscope)

• Attitude indicator

– artificial horizon

– pneumatic

– electronic

• Doolittle – IFR flight

19

09

19

30

19

10

19

17

19

18

19

19

19

20

19

11

19

12

19

13

19

14

19

15

19

16

19

31

19

21

19

22

19

23

19

24

19

25

19

26

19

27

19

28

19

29

Page 8: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 8 of 59

First Airplane Radio Telegraph – 1910

Dimensions: Overall: 14 x 32 x 9 3/4in. Weight: 32 lbs. Materials: Wood and metal

Page 9: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 9 of 59

First Airplane Radio Telegraph – 1910

TYPE A-4 AEROPLANE WIRELESS

TELEGRAPH SET Developed For

WESTERN WIRELESS EQUIPMENT CO.

Page 10: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 10 of 59

A WWI type of airplane radio. Note the insulator and antenna connector

An early aviator standing by a ground controller communicating with an airplane

Officials making radio telephone tests from the ground to an airplane in 1917

Voice Radio – WW I

Page 11: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 11 of 59

Page 12: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 12 of 59

World War II • Norden Bombsight

– tied to autopilot

• Radar – Chain Home – Airborne Radar – Night Fighters – Phased Array

• Identification, Friend or Foe (IFF) • Countermeasures

• Decca Navigation System • Gyro Gunsight –Supermarine Spitfire IX • Jet Engines - Me 262 • V-2 rocket • Rocket Propelled Aircraft – Me 163 Komet • Helicopters

19

33

19

47

19

34

19

35

19

36

19

37

19

38

19

39

19

40

19

41

19

42

19

43

19

44

19

45

19

46

Page 13: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 13 of 59

Norden Bombsight

Page 14: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 14 of 59

Radar

Page 15: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 15 of 59

Page 16: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 16 of 59

Decca Navigation System

Page 17: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 17 of 59

Page 18: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 18 of 59

Gyro Gunsight

Supermarine Spitfire IX

Page 19: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 19 of 59

First Generation Jet Fighters

Messerschmitt Me 262 Gloster Meteor

Bell P-59 Airacomet

Page 20: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 20 of 59

Early Cold War & Korean War • Tactical air navigation (TACAN) • Astrotracker on B-58 (precursor

to GPS) • Airborne intercept radar with

tracking capability • Medium pulse repetition

frequency (PRF) airborne intercept radar

• Digital mission computers

• Inertial navigation systems • Semi-automatic ground

environment (SAGE) • Early Joint Tactical Information

Distribution System (JTIDS)-type display on F-106

• Supersonic flight – Yeager breaks sound barrier

• Sputnik (first artificial satellite) – space race

19

48

19

50

19

51

19

52

19

53

19

54

19

55

19

60

19

61

19

49

19

65

19

58

19

57

19

59

Page 21: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 21 of 59

Korean War

• F-86 Sabre – Second Generation Jet Fighter – Range-only radar – Radar ranging gunsight – Infrared missiles

Page 22: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 22 of 59

Vietnam War • Doppler radar • Integrated electronic warfare • Fully automated weapon release • Terrain-following radar • Automatic terrain following • Head-up display (HUD) • Laser target marking technology • Early digital mission computer

• Target Identification System, Electro-Optical (TISEO)

• C-5 triple INS – Sophisticated avionics – Voting system – replaced navigator

• Space race - Apollo 11 – moon landing

• SR-71 – fastest and highest flying aircraft

19

60

19

64

19

65

19

66

19

67

19

68

19

69

19

70

19

71

19

72

19

73

19

74

19

61

19

62

19

63

Page 23: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 23 of 59

Vietnam War

• AC-130A Spooky

– Early use of FLIR

Page 24: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 24 of 59

Vietnam War

• EF-105F/G and EF-4C Wild Weasels

• First dedicated SEAD/DEAD aircraft

• Electronic Attack Avionics and Weapons

An F-4G Phantom II with Wild Weasel payload; near to far: AGM-88 HARM, AGM-65 Maverick, ALQ-119 ECM pod, AGM-78 Standard ARM and AGM-45 Shrike.

Page 25: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 25 of 59

Vietnam War

F-4 Rear Instrument Panel

Upper Portion of F-4 Rear Instrument Panel – note total lack of forward visibility for the Weapons Officer

McDonnell Douglas F-4G Wild Weasel at the National Museum of the United States Air Force. (U.S. Air Force photo)

Page 26: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 26 of 59 Laser Guidance of an LGB

Vietnam War

Page 27: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 27 of 59

Advances in Technology – Cold War

Advances in Electronics – smaller, lighter, more powerful, more efficient (require less current) ◦ Semiconductors ◦ Transistors ◦ Integrated Circuits ◦ Microprocessors

Advances in Displays

LEDs

LCDs

Pave Pillar

High speed data bus

Replace dedicated wiring harnesses

Greater information flow

Resource sharing

Moore’s Law

Page 28: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 28 of 59

Evolution of avionics architectures

Page 29: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 29 of 59

Evolution of avionics architectures

Page 30: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 30 of 59

Evolution of avionics architectures

Distributed Analog Architecture – no bus

F-86 Sabre

F-94 Starfire

Page 31: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 31 of 59

Evolution of avionics architectures

Page 32: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 32 of 59

Evolution of avionics architectures

Distributed Digital Architecture – no bus

F-4 Phantom

AV-8B Harrier

Page 33: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 33 of 59

Avionics Transition

• Bus Architecture

• Multifunction Displays (MFDs)

• Head-Up Display (HUD) Advances

• Global Positioning System (GPS)

• Line Replaceable Units (LRUs)

• Stealth

19

75

19

90

19

76

19

77

19

78

19

79

19

80

19

81

19

82

19

83

19

84

19

85

19

86

19

87

19

88

19

89

Page 34: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 34 of 59

Evolution of avionics architectures

Page 36: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 36 of 59

Line Replaceable Units

Above: a Republic F-105D Thunderchief in flight with a full bomb load of sixteen 750 lb bombs on its five hardpoints

Left: Front view of F-105B with avionics layout

Page 37: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 37 of 59

Avionics Transition

A schematic example of a multi-function

display (MFD)

Page 38: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 38 of 59

Head-Up Display

Page 39: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 39 of 59

Global Positioning System (GPS)

Page 40: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 40 of 59

Stealth

Page 41: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 41 of 59

Global War on Terrorism

• Global Positioning System (GPS)

• Integrated Cockpit Avionics • Helmet Mounted Display • Uninhabited Air Vehicles

• Active Electronically Scanned Array (AESA) Radar

• Stealth • Smart Skins • The CNN effect (near real time

newscasts)

19

90

20

00

20

01

20

02

20

03

19

91

19

92

19

93

19

94

19

95

19

96

19

97

19

98

19

99

Page 43: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 43 of 59

Glass Cockpit

Garmin G500H Advanced Display System - A Glass Cockpit for Helicopters

Page 44: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 44 of 59

Active Electronically Scanned Radar Array

AN/APG-81 - F-35 AESA Radar

Page 45: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 45 of 59

Electronically Scanned Radar Arrays

Simultaneous Multimode Radar Operation

Page 46: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 46 of 59

Comparison of fighter radar ranges (from Moir, Ian, and Seabridge, Allen, Military Avionics Systems, John Wiley & Sons, Ltd., West Sussex, England, 2006)

Electronically Scanned Radar Arrays

Page 47: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 47 of 59

Evolution of avionics architectures

Page 48: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 48 of 59

Evolution of avionics architectures

Integrated Modular Architecture F-22 Raptor

F-35 Lightning II

Page 49: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 49 of 59

Global War on Terrorism

• Fifth Generation Jet Fighter: F-22 Raptor

– True glass cockpit

Page 50: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 50 of 59

F-22 CNI Apertures (from Moir, Ian, and Seabridge, Allen, Military Avionics Systems, John Wiley & Sons, Ltd., West Sussex, England, 2006)

Page 51: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 51 of 59

F-22 EW Apertures (from Moir, Ian, and Seabridge, Allen, Military Avionics Systems, John Wiley & Sons, Ltd., West Sussex, England, 2006)

Page 52: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 52 of 59

Global War on Terrorism

• F-35 Lightning II

• Voice recognition

• Cockpit simulation

• Touch Sensitive

Page 53: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 53 of 59

F-35 Integrated RF architecture (from Moir, Ian, and Seabridge, Allen, Military Avionics Systems, John Wiley & Sons, Ltd., West Sussex, England, 2006)

Page 54: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 54 of 59

Distributed Aperture System

Distant rocket launch as seen by the F-35’s AN/AAQ-37 Electro-Optical Distributed Aperture System (EO DAS). Source: Northrop Grumman

http://www.youtube.com/watch?v=e1NrFZddihQ

Page 55: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 55 of 59

Ad Inexplorata • Future designs

– Autonomous (navy drone)

– Pattern recognition

– Artificial intelligence

– Nanotechnology – will affect avionics- size of sensors- miniature inertial system

– 3-dimensional computers

– Cyber arms race

Page 56: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 56 of 59

References • Air Force History & Museums Program, A Century of

Air and Space Power Timeline, United States Air Force, Washington, D. C., 2003

• Anderson, John D., The Airplane: a History of its Technology, American Institute of Aeronautics and Astronautics, Reston, Virginia, 2002

• Angelucci, Enzo, Rand McNally Encyclopedia of Military Aircraft, 1914 to the Present, Crescent Books, New York, 1990

• Crosby, Francis, A Handbook of Fighter Aircraft, Hermes House, 2003

• Evans, A. A., and Gibbons, David, The Compact Timeline of Aviation History, Worth Press Ltd., Hertfordshire, UK, 2008

• Helfrick, Albert, Principles of Avionics, Sixth Edition, Avionics Communications Inc., Leesburg, VA, 2010

Page 57: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 57 of 59

References (continued) • Kayton, Myron, and Fried, Walter R., Avionics Navigation

Systems, 2nd Edition, John Wiley & Sons, New York, 1997

• Keijsper, Gerard, Joint Strike Fighter: Design and Development of the International Aircraft, Pen & Sword Aviation, an imprint of Pen & Sword Books Ltd., Barnsley, South Yorkshire, United Kingdom, 2007

• McShea, Robert E., Test and Evaluation of Aircraft Avionics and Weapon Systems, SciTech Publishing, Raleigh, North Carolina, 2010

• Moir, Ian, and Seabridge, Allen, Military Avionics Systems, John Wiley & Sons, Ltd., West Sussex, England, 2006

• Northrop Grumman

• Price, Alfred, Instruments of Darkness, the History of Electronic Warfare, 1939—1945, Revised Edition, Greenhill Books, London, United Kingdom, 1977

• Price, Alfred, The History of U.S.Electronic Warfare, Vol. I, II, & III, The Association of Old Crows, 2000

Page 58: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 58 of 59

References (concluded) • Richards, Mark A., James A. Scheer, William A. Holm,

Principles of Modern Radar, SciTech Publishing, Raleigh, North Carolina, 2010

• Shaw, Robert L., Fighter Combat: Tactics and Maneuvering, Naval Institute Press, Annapolis, Maryland, 1985

• Skolnik, Merrill I., Radar Handbook, 2nd Edition, McGraw-Hill, New York, 1990

• Smallwood, William L., Strike Eagle: Flying the F-15E in the Gulf War, Brassey’s, Washington DC, 1994

• Spenser, Jay, The Airplane: How Ideas Gave Us Wings, Smithsonian Books, 2008

• Stimson, George W., Introduction to Airborne Radar, 2nd Edition, SciTech Publishing, Raleigh, North Carolina, 1998

• Wikipedia

Page 59: A Brief History of Military Avionics - sftentx.comsftentx.com/files/78637159.pdf · I n t e g r i t y - S e r v i c e ... Avionics are the electronic systems used on aircraft, spacecraft,

Slide 59 of 59

Questions?