Boys have a natural interest
in how things work. The Engineer Activity Badge gives an introduction to
how the big things in our lives work, such as things that we take for granted
in our houses and our communities. Engineer is in the Technology group.
To introduce Webelos to a
variety of engineering careers.
To give the Webelos some insight into the
kinds of problems engineers solve.
Keep in mind that an engineer's job
is to apply the laws of physics and chemistry to solve a variety of problems
in construction, manufacturing, and other areas.
BOY SCOUT MERIT BADGES
Architecture, Drafting, Engineering,
Pioneering, Electricity, Electronics, Masonry, Machinery, General Science
Webelos Den Activities, pp. 30-32.
Program Helps, Scouting Magazine.
Local power companies.
County or city government engineers.
Army Corps of Engineers.
Have the boys find pictures of different
bridges and put together a poster for pack meeting.
Visit a college engineering department.
Invite an engineer to visit the den meeting
to talk about their job.
WHERE TO GO, WHAT TO DO
Measure the dimensions of your meeting
place and include the locations of doors and windows. Show how to sketch
a simple floor plan with these measurements.
Make a block and tackle and demonstrate
Make catapults and have a contest. Demonstrate
for the pack meeting.
Invite an engineer (of whatever kind)
to a den meeting to tell about his job.
Invite a surveyor to tell about his job
Invent a machine to do a task. You might
even have fun concocting a "Rube Goldberg" invention.
Visit a construction site with a contractor.
Ask him to explain the use of blue prints and the order of construction.
Have someone explain how to read topographic
Take a field trip to an operating draw
bridge, grain elevator, ship loading operation or other large industrial
operation involving large cranes or other lifting equipment.
Compare design and construction of various
kinds of bridges and make a model of one or more.
Based on a foot bridge found
in the high mountains of India, the monkey bridge uses one thick rope to
walk on and two others as hand ropes.
The same design and knots used in
the full-sized version are used in this model. The monkey bridge is often
built in Scout camp as part of the Pioneering merit badge.
You'll need some hemp cord, some
pieces of strong string, four 1/4" dowels 10" long, and two 1/4" dowels
4" long. A piece of scrap lumber at least 30" long and 4" wide makes a
Make the shear lashings first, about
4" from the top of the shear legs. Tie loosely so the legs can open. Add
the crosspieces, fastened with square lashings about 2" from the bottom.
All lashings begin and end with a clove hitch.
Stretch the cord between the supports
and tack the ends in place. Add the hand ropes and fasten them to the same
anchor. Paint or stain the wood to give the bridge a rustic look.
MAKE A STEAM
A Webelos Scout may get a
graphic demonstration of the power of steam by building the simple steam
turbine shown in this illustration. Materials needed are a tin can, a lid
from a second tin can, a pair of tin snips, a sheet metal screw, a cork,
a power drill, an extra piece of tin to make the support for the turbine
wheel, a finishing nail, and a source of heat.
Assemble to look like the illustration.
WHAT IS AN ENGINEER?
Engineer is defined as a person
who is skilled in at applying scientific knowledge to practical uses.
Anybody can be an engineer - involved in the creation or construction of
something. The Webelos Scouts will gain some
insight about the practical application of skills and knowledge by studying
the Engineer activity pin.
FIELDS OF ENGINEERING
Aeronautical Engineering - deals with
the whole field of design, manufacturing, maintenance, testing, and the
use of aircraft.
Industrial or Management Engineering
- pertains to the efficient use of machinery, labor, and raw materials
in industrial production.
Chemical Engineering - concern with the
design, construction, and management of factories in which essential processes
consist of chemical reactions.
Civil Engineering - is one of the broadest
of the engineering fields dealing with the creation improvement and protection
of the communal environment. Buildings, roads, bridges, airports
and other constructions are just a few of the areas civil engineers impact.
Electrical Engineering - involves the
use of electrical power, electrical machinery and communication, information,
and control systems.
Geological and Mining Engineering - includes
activities related to the discovery and processing of minerals.
Mechanical Engineering - speaks to the
design and operation of all types of machinery.
Safety Engineering - is concerned
with the prevention of accidents.
There are many types of engineers.
Chemical, electrical, civil and industrial are just a few.
takes a creative mind and attention to detail to be a good engineer.
Through work on the Engineer Activity Badge, your Webelos Scouts will get
an appreciation for engineering and what it takes to accomplish engineering
The Seven Wonders of the World
are great feats of engineering. Have your boys find out some information
about them including, height and years of existence. Here is a list
*The pyramids of Egypt
are the only one of the Seven Wonders still in existence
|Pyramids of Egypt*
|Hanging Gardens of Babylon
|Colossus of Rhode
||Island of Rhodes (off coast of Turkey)
|Temple of Artemis (Diana)
|| Ephesus, Turkey
|Tomb of Halicarnassus
|Lighthouse of Alexandria
||Island of Pharos
|Statue of Zeus
LARGEST BUILDINGS IN THE WORD
The Pentagon 6,636,360 sq. ft 1943
Sears Tower 4,500,000 - sq. ft 1974
Merchandise Mart 4,023,400 sq./ft 1931
All land surveys tie into a "Bench
mark". The benchmark is a bronze disk about two inches in diameter indicating
the location and elevation of its position. Tile city engineer for your
city will be able to tell you where the benchmarks are located within your
city or area. You can survey an area near your den site even without knowing
where the benchmark is located. Start by using Et fixed point marked by
a colorful rag held in place by a nail pushed into the ground.
To do this demonstration, yeti will
need a compass, a 2x4 approximately three feet long, and a 50- or 100-foot
long tape. Start at one corner of the area to be surveyed. Take a reading
of your compass setting at the top of the 2x4 and measure the distance
to the next point. Do this around your area that you have chosen to survey,
making sure that you mark down the Compass and linear distance between
each pair of points.
If possible, try to get a surveyor's
transit to show the Webelos. This transit works much the same way as the
above demonstration but also gives degree readings in elevation as well
360 degrees North 40' Points A
90 degrees East 100' Points B to
180 degrees South 40' Points C
270 degrees West 100' Points D
Symbols can be used in floor plans drawn for
requirement 8 of the Webelos Engineer activity badge.
Make a game of learning
them by putting each one on a 3" x 5" card and using them as flash cards.
STRENGTH OF A HOLLOW TUBE
Begin the demonstration by
laying a brick on a Styrofoam cup laying on its side. Place another
cup on its rim and add bricks (2 or 3) until it crushes. Glue 4 cups
together rim to rim and bottom to bottom with white glue and allow to dry.
Place bricks (usually 4) on until the structure crushes. Demonstration
shows the use of columns in engineering and bridges.
With the pencil, poke a hole in the
center of the paper plate.
Materials: Pencil, paper plate with ridges,
water faucet and sink
Insert the pencil through the hole
in the plate, wiggling the pencil back and forth so the hole is loose enough
that the plate turns easily on the pencil.
Turn on the tap water to produce
a steady stream of water.
Hold the pencil so that one edge of the
paper plate touches the water.
The plate will spin. If you
turn the faucet higher the plate will sin faster.
What did you do? You have just
created a primitive waterwheel or water turbine.
For Engineer activity badge item number
5, the scouts are to draw three types of bridges.
For additional fun, have
the scouts make bridges out of toothpicks. Each scout can make his favorite,
or you can do this as a den activity to test the different strengths of
each bridge design.
To make the bridges use white glue
and the tooth picks that are square in the centers and rounded on each
end. Do not use hot glue, as it will stretch and not give accurate results.
The Webelos Book shows several bridges, of which the plank, beam, and truss
bridges will be easiest to build from toothpicks.
If you wish to test the bridges,
they must follow these additional guidelines.
Each bridge must span a determined
distance. Six inches between supports is a good distance.
Each bridge must be one toothpick
Each bridge must not use more than
one box of toothpicks
The bridge building must be done
in stages, giving time for the glue to set up.
Work on toil or plastic
wrap so that the bridges won't stick to the table, and you will be able
to move them.
Let them dry for several days before testing.
To test the bridges, support them,
one at a time between two tables or two chairs.
Place a l\2 or 3\4 inch
dowel, 1 foot long over the bridge, and hang a 3 pound coffee can (or similar)
from the dowel.
(The coffee can should have holes
on each side which have rope or heavy wire handles attached. The handles
should be the same length, and should hang on either side of the bridge
Test the bridges by pouring sand,
one cup at a time, into the can. Count the number of cups of sand added
until the bridge cracks.
AND TACKLE DEMONSTRATION
This graphic demonstration shows
how block and tackle increases power. Use two lengths of broomstick or
dowel and a length of clothesline. Attached (by knot, staple or nail) one
end of the line to one of the sticks. Wrap line loosely around both sticks
as shown. Have two of the bigger den members hold the sticks. Ask the smallest
Webelos Scout to pull on the line. He will be able to pull the two sticks
together, no matter how hard the bigger boys try to hold back.
A second type of block and tackle
may be easily constructed which will allow Webelos Scouts to see a simple
version of a working model. This simple machine and its uses will captivate
most boys, and they can make one either as a den project or individually.
The only materials necessary are a few small pieces of wood, a couple of
hooks, a length of light rope, and two thread spools. If spools are not
available, make them by cutting up a dowel or broomstick, and drilling
a hole in the center of each spool and using a nail for an axle.
La MOUSSE 500 is a mouse trap cars it
is powered by a mouse trap a mouse trap on wheels something so simple
and inexpensive that anyone can make one. The idea was conceived by some
French Canadian Scouts from Ontario, and the instructions had to be translated
from the French. They went to a Youth in Action fair and where it was
the hit of the show.
|List of Material
Front wheels and axle ( Pinewood derby) 2 each
Mouse trap (Victor brand)
Wood block 1 3/4 x 4 3/4 x 1/2
Screw eyes 5/16 2 each
Rear wheels S 4 dia. 2 each
Dowel 1/4 x 4
Nylon string ,6
Remove the cheese holder and hook arm from the trap base.
Mount the trap on the base with the
snapper to one end (as shown on the diagram above).
|Carefully measure 1/2 from the end
of the base for the eyelets. Install eyelets so that the dowel axle turns
freely. Drill a 1/16 hole through axle (this is for winding the string).
Mount rear wheels on the rear axle.
Be sure that the wheels turn freely and do not bind against the body block.
|Spacers may be needed
to aid in this. Front wheels Remove any molding flash from wheels.
Carefully locate and drill guide
holes for the front axle pins. Install wheels testing to make sure that
they turn smoothly.
Tie a string about six inches long
to the center of the snapper. This will then be fed through the hole in
the rear axle.
HOW TO OPERATE
Pull the snapper back to its full
extent and hold with thumb. Slip the tip of the string through the hole
in the axle and wind the wheels backward, winding the string around the
Set the racer on the floor, not carpet,
and release. The car should go at least 9 feet. If the string is too long
it will wind around the axle and stop the car. Speed and distance can
be increased by waxing the axle where it rubs on the screw eyes. Any other
modifications that will give better operation and looks are up to you.
- Divide the den into
two teams. Give each player three peanuts.
- One at a time, the
players try to catapult their peanuts into an empty milk carton which is
sitting on the floor.
- They do this by holding one end of a ruler
in one hand, holding a peanut against the other end of the ruler and bending
it back, then releasing it so the peanut will sail towards the carton.
Score one point for each peanut that lands in the carton.
Catapult Arm: Three Popsicle sticks (cut
one down to 1k), a 15 piece of strong twine, one plastic spoon (cut handle
until there is 3//i of handle left on spoon), one rubber band (lightweight).
Base: Wooden slat 3/8 thick (approx.
1 3/8 X 3 1/4).
Sides: Eight Popsicle sticks, one
clamp clothespin, 1 3/4 nail
Missiles: Clay balls about 3/4 in
diameter wrapped in aluminum foil.
This is a fun, but somewhat involved
- Start by cutting all the pieces from 3/4 clear
white pine, check them all for fit.
- Attach the vertical pieces to the base
using wood glue and nails or screws.
- Insert the crank shaft and secure
with dowels. This must turn very freely. If needed ream out the holes slightly.
- Attach the pivot shaft and arm and secure with dowels. The arm must pivot
freely on the pivot shaft, and must not rub on the vertical pieces.
the rubber band shaft and secure with dowels. You may want to try different
rubber bands until you reach maximum performance.
- Last step is to attach
a cord between the arm and crankshaft, crank it down, and let her rip!
Or Visit The
- Dry cell and battery holder
22 gauge insulated hook-up wire (Radio
Miniature 1.5 volt bulb (Radio Shack)
Miniature socket to fit bulb (Radio Shack)
Use the nail to punch six holes down
the left side of a piece of cardboard and six holes down the right side.
Cut the wire into 6 pieces that will
comfortably extend between any hole on the left side to any hole on the
right side of the cardboard.
Strip 1/2" of the insulation from both
ends of the wires. Place the end of each wire in any vacant hole on the
left and the other end in any vacant hole on the right. Secure wires in
place with hot glue.
Cut another length of wire, strip tile
ends, and connect one end to one of the dry cell holder
terminals and the other end to one of
the socket terminals.
Connect a second wire (with the insulation
stripped off the ends) to the remaining terminal of the dry cell holder.
Attach a third wire (with stripped ends)
to the remaining terminal of the socket.
Test: by touching the two free ends of
tile wires together briefly, the light should go on.
Write a question next to one of the holes
on tile left side of the cardboard. Follow the wire from the left side
to its end on tile right. Write the answer to this question next to the
hole on the right side of the cardboard that holds the opposite end of
the wire. Continue this procedure for all 6 wires.
Ask a friend to take the two free ends
of the wires from the cell holder and socket and touch the matching questions
and answers. Tile light bulb will light up when the answer is correct.
This works because the circuit is completed
by touching the question with one end of the wire and the answer with the