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Aerospace Activity for September 2000
 
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The Wright Brothers
as Role Models

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Objective

The Wright Brothers were the first to perfect a heavier-than-air flying machine that was capable of controlled, sustained and powered flight.  This activity will show how the Wright brothers' dreams, perseverance, hard work and methodical scientific experimentation paid off with great success.

"It is my belief that flight is possible and while I am taking up the investigation for pleasure rather than profit, I think there is a slight possibility of achieving fame and fortune from it."

-- Wilbur Wright
September 3, 1900

Time Requirement

Variable.  Activities can include a brief lecture, distribution of CAP's Wright Brothers Activity Booklet, or exploration of various internet resources.

Materials

Consider the following items for this activity:

  • CAP's Wright Brothers Activity Booklet - download it for free here and print it on your laser printer or get copies made locally. 
  • A 3-view plan of the Wright Flyer - download it for free here and print it on your printer.
  • A drawing of the Wright Flyer - download it for free here and print it on your printer.
  • If you have access to the internet, have the students explore some of the Wright Brothers links presented at the bottom of this page.  (They're free, too!)

WB_3view_small.gif (9411 bytes)
The 3-View Plan Available from the Air and Space Museum.
(Click on the image to download a larger version)

WB_drawing_small.gif (10922 bytes)
A Drawing of the Wright Flyer by the Air and Space Museum.
(Click on the image above to download a larger version)

WB_flight_small.jpg (12775 bytes)
The Historic First Flight - December 17, 1903.
(Click on the image above to download a larger version)

Procedure

Assemble materials as required.  Review the information presented in the Background section of this lesson plan, and present this information to the students.

Key points to cover with the students:

  1. The Wright Brothers did not just jump in and start trying to fly.  They followed a pattern which most students of today know as "the Scientific Method."  They first discussed the problem, then experimented with various possible solutions.  Data was gathered from these experiments and eventually they developed conclusions about the actual process of flight in a heavier-than-air machine.  Along the way, they proved other previously developed and widely accepted data to be incorrect.  From their conclusions, they built first a basic glider, then a controllable glider, and finally a powered machine that was controllable.
  2. Although the Wright Brothers experienced many failures, they never gave up on the dream.  The little glider had to even be rebuilt several times after several crashes.
  3. The actual flight data is easily remembered using the 12-12-12 mnemonic.  The first flight lasted 12 seconds; the Flyer rose 12 feet off the ground, and it went forward a distance of 120 feet. 

Background

Orville and Wilbur were members of a family of seven.  They were born to Milton and Susan C.K. Wright.  The father, Milton, was a bishop in the United Brethren in Christ church.  Wilbur was born in Richmond, Indiana, in 1867 and Orville, the younger, was born in Dayton, Ohio, in 1871.

As children, they were taught to be self-sufficient, and a great emphasis was placed on their education.  When Wilbur was eleven and Orville was seven, their father gave them a toy "helicopter' that was equipped with two counter-rotating propellers.  They toy had a tremendous impact on the boys, and many historians agree that this was the beginning of their interest in flight.  They spent countless hours playing with the helicopter, flying kites and studying all of the flight-related literature of the times.  They were especially impressed with the works of Otto Lilienthal and Octave Chanute.

After graduating from high school, Orville went into the printing business with a friend.  They printed handbills, tickets and other small items.  Shortly after the death of their mother, in 1889, Wilbur joined the little company and became involved in the publication of a local newspaper called The West Side News. During this time the brothers also created a bicycle business to take advantage of a nationwide interest in cycling.

As time went on, their interest in flight became even more intense and by the end of 1898, they were ready to start construction of a glider.  The brothers decided that the best design would be a biplane, because of its "boxkite-like" strength.  They also theorized that the optimum means of maintaining equilibrium in flight was with moveable "control surfaces."   The came to this conclusion by observing how seagulls, and other birds, were able to turn by twisting or "warping" their wings.

The brothers also knew that a steady flow of wind was going to be necessary for testing and so they researched possible windy sites with the National Weather Service.  The most promising choice proved to be a desolate beach near the town of Kitty Hawk, North Carolina.  The site of most of their experimentation took place on a wind-swept section of that beach known as Kill Devil Hills.

At first, Orville and Wilbur designed a wing based upon the calculations and experiments of Octave Chanute and Otto Lilienthal.   Their first glider was developed as a kit - later, it was equipped with control surfaces.  They found that by warping the wings, the craft would respond by banking.   In July, 1901, they tested a larger glider that had a smaller wing - an elevator - in front.  They built it so that a pilot could lie prone on the lower wing and control the warping by moving his body from side to side.  To control pitch, they used a hand control for the front-mounted elevator.

Their initial experiments in control were discouraging.  A breakthrough came when they were visited by Octave Chanute.   After hours of discussion, they all concluded that the air pressure tables the Wrights had been following were wrong.

The encouragement of Chanute, coupled with their keen interest and tenacity, motivated them to continue to study and approach their problem scientifically.  During the winter of 1902 they built a wind tunnel to test airfoils and to build new mathematical tables involving lift.  The 1902 glider was modified to obtain more lift, and a rudder was added to the rear of the craft.  When they returned to the Kitty Hawk test site, they were elated to find that the new glider went 622 feet.  They knew that they had solved the most daunting problem, and that was control.

In March of 1903, the brothers applied for a flight control system patent.  They were confident that an engine was all that was needed to achieve sustained flight.  At that time, few small engines existed and again, by sheer determination, the brothers decided to build their own.  With the help of machinist C.E. Taylor, they built a lightweight, four-cylinder engine that produced all of 12 horsepower.  They set about designing a suitable propeller and again, they tested everything thoroughly.

Finally, on the 17th of December, 1903, with J.T. Daniels, W.S. Dough, A.D. Ethridge, W.C. Brinkley and Johnny Moore as witnesses, Orville climbed onto the lower wing and prepared for flight.  The wind was averaging 24 miles per hour, and with full throttle, the craft left its launch "runway" and took flight.  It went 120 feet forward, rose 12 feet above the Earth, and stayed in flight for 12 seconds.  This was the first controlled, powered, and sustained flight in history.  Three more flights were made that day.  The longest was 852 feet, and lasted 50 seconds.  Wilbur was the pilot.

As role models, the Wright brothers are outstanding.  They had a dream; they studied hard; they worked even harder and with careful, scientific testing, made their mark on the history of mankind.

Statistics

On the morning of Thursday, December 17, 1903, Orville Wright flew into the pages of history in a tiny airplane called the "Flyer."  It had the following specifications:

Dimensions

Length 21 feet, 3/8 inches
Height 9 feet, 3-9/32 inches
Width 40 feet, 4 inches
Empty Weight 605 pounds

Wing

Wingspan 40 feet, 4 inches
Chord 6 feet, 6 inches
Wing Anhedral (Droop) 10 inches
Wing Area 510 Square Feet
Wing Loading 1.46 Pounds per Square Foot

Engine

Type 4 Cylinder, 4 Cycle
Bore 4 inch
Stroke 4 inch
Output 12 HP at 1020 RPM
Weight (Engine Only) 152 pounds
Weight with Accessories (including Magneto) 170 pounds

Propellers

Type Dual Pusher, Counter-Rotating
Drive Bicycle Chain
Size 8 foot diameter
Material Carved Spruce

Fuel System

Lines Rubber Tubing
Capacity .4 Gallons
Feed Gravity (tank mounted on wing strut)
Carburetor None.  Fuel dripped onto distribution plate and fed into cylinders (a primitive form of fuel injection.)

Discussion

It should be emphasized to students and cadets how the Wright Brothers set about making a dream come true by hard work and determination.  Another point that should be emphasized is the method they used to make this dream come true.  They followed a logical, scientific path of theorizing, building and testing to make their machine work.

Wright Brothers Resources on the Internet (Note: these links will leave this site.)
PBS - The American Experience: The Wright Stuff (Television documentary site)
The Wright Brothers Page (Lots of great photos from 1900-1903.)
Henry Ford Museum / Greenfield Village (Where the Wright Cycle Shop is preserved today!)
Centennial of Flight Commission (NASA) (A group building an exact replica of the Flyer for the centennial)
More Links!
Order Printed Drawings featured on this page from the National Air & Space Museum
WB_flyer_today.jpg (22954 bytes) The Wright Flyer is preserved today in the Smithsonian's Air & Space Museum.

Visit the Air & Space Museum's Aircraft File on the Wright Flyer, which describes the history and restoration if this aircraft. (Did you know that this very airplane was in England during World War II, and was protected underground with British national treasures?  Read about it!)

Safety Concerns

Only usual classroom issues should be of concern here.

Adapted from: Aerospace 2000, Volume 5 (Activities 71 & 72)
Published by the Aerospace Education Training Directorate
National Headquarters, Civil Air Patrol.

Copyright 2008, Civil Air PatrolTerms of Use