Zuraiz Science Library

• there are two type of cars

• 
  
• 
  
• 
  
• 
  
• 1
  Choose which kind of R/C car you want to build. Different engine types offer vastly different top speeds and performance specs. In order of increasing speed, they generally follow this order: electric, nitro and gas.
• 2
  Purchase a motor if it's not included in the kit. Nearly all R/C motors can be "hopped up" at a later date if you want to swap out for something more powerful. First-timers may want to start with more manageable power and move up as their skill levels increase.

• • EV Charging Connectors

  • J1772 Type 1 & 62196 Type 2 Plugs, sockets & cable assemblies
• 3
  Get a transmitter/receiver package for your remote controlled car. Most such accessories can be found simply by clicking on a link with the appropriate parts for your build model of choice.

Build Your Car

• 4
  Assemble the chassis using pliers and a screwdriver. Solid makes and models that come at 1/10 or 1/8 scale will usually require significant torque to tighten everything completely, so you may want to use a power drill.
• 5
  Put together the shock tower assembly, taking particular care to place the long screws for the camber links in their proper orientation.
• 6
  Build the engine. It's not unusual for R/C car engines to come with several parts, so take care and follow the manufacturer's instructions for glow starters, slide carbs and other tiny components.
• 7
  Assemble the servo, being sure to center it first so your driving isn't erratic. It may help to tie the leads together for a cleaner interior environment as well.
• 8
  Add the tires, being sure the treads are all oriented the right way.
• 9
  Let 'er rip! If you have done everything right and the radio controls are properly aligned, you should be able to achieve dazzling leaps and turns in a matter of minutes.

Introduction:Pulley motor car is an electric car using pulleys to transfer the mechanical energy from the motor to the wheels. MiniScience's Pulley Car activity introduces students to compound machines and simple machines including pulley, wheel and axle while incorporating problem solving, mechanical design and modeling. In addition, students will experience using hand tools as they construct their Pulley Motor Car.

• Propulsion types and drive concepts
• Basic soldering techniques and electronic concepts
• Simple electric circuit including battery, motor and switch

Teacher Preparation:During construction of the Pulley Motor racer vehicle, students can experiment and comprehend methods of power transfer, soldering (optional), wheel alignment and calculating pulley wheel ratios. It is up to the teacher to make sure this background information is provided to students in some manner.  Materials Checklist: Before using the kit please make sure you have all the items listed below. This kit has the supplies to build one pulley motor car model. A pulley motor car is an electric car that uses pulleys and belts for its transmission system. Battery Holder AC motor Rear Slicks 1 9/16" diameter x 5/8" wide Front Wheels 1 3/8" diameter 1/8" dowel for axles

6. Traction Bands
7. Eyelets or washers
8. Straw
9. Eye Screws
10. Pulleys
11. Wood Sheet 5" x 2" x 3/32" (or larger, so you can cut to any size)
12. Axle Guards, Basswood 1/5" x 1/5" x 2" (5mm x 5mm x 5cm) sticks
13. Motor Mount (With straps if needed)
14. Procedure Sheet

Propulsion Systems:Propulsion systems include using two AA batteries  and a DC motor with a Pulley and Rubber band drive. Advanced students are encouraged to experiment with different size pulleys.

• craft knife, used to cut or trim soft wood.
• White glue, wood glue or glue gun
• Soldering Iron, needed if you need to solder wires.
• Pliers, used to connect and twist wires together if needed
• rulers, used for measurements
• Pencil, used for marking

• Wear safety glasses
• Use care with sharp cutting blades
• Avoid touching the tip of the glue gun or soldering gun
• Put safety first

Step 1:

Construct the basic car chassis with 4 wheels Cut a strip of wood that is 2" (5cm) wide.Mark the location of axles by drawing two lines, one on each end of the car, parallel to the front or back side. Axle lines must be about 1 inch away from the front or back. On the axle lines, mark two points that are 1/4" (6mm) away from each side. Insert one eye screw in each of the points. Eye screws are used to hold the axles. Insert the axle and make sure it is level and it can spin freely. If necessary, adjust the eye screws.For the back wheels cut a space for the pulley before inserting the eye screws. Without cutting a space for the pulley, one wheel will stay out about 3/8" more than the other. Cut some plastic tubes or straws and use them as the spacer in both sides. If you have metal washers, insert them between the straw pieces and the eye screws. Insert the wheels. Wheels may be inserted while the axle is in position.You can also insert the axle into one wheel and then pass it through the eye screws. At the end your simple car will look like this. You can use it the way it is or you can turn it over as shown in the picture bellow. In the model shown here, the gears are built in the rear slicks (rear wheels). With plain wheels, you had to insert a pulley or gear in the same axle with one wheel.If you don't need to install pulleys or gears, continue with step 2. To mount a pulley or gear next to one wheel, it is a good idea to cut some space for that on your chassis; otherwise, one wheel will stand out and your model will not have a symmetrical shape. The size of this space may vary depending on the size of your pulley or gear.(3/8" x 1 1/2" cut is shown in this example) This is how a pulley or gear may be mounted beside one of the wheels. The pulley or gear must have a hole matching the axle diameter and must feet snugly. Some pulleys and gears require a plastic insert and some drilling in order to adapt the diameter of the axle you are using. After mounting, make sure that the wheels can spin freely. If necessary, mount a metal washer between the spacer and eye screws. Other methods of mounting the axle You may not have eye screws for mounting the axles. This is an alternate method for mounting wheels and axle.Insert the axle in one wheel, slide a washer onto it. Insert a 5 1/2" straw over it and finally insert another washer and another wheel. Your final wheels and axle will look like this. Hold the straw and spin the wheels. Make sure the wheels can spin freely. If necessary, make some adjustments. Cut 4 pieces of 2" (5cm) long wood strips and glue them about 1/5" (5mm) apart where you want to mount the axles. Insert the axle in the space between the strips and secure them in place using some glue. Cover it with a strip of cardboard or heavy construction paper. Note that the glue will touch the straw, not the axle. This is how the bottom of your car will look like after covering the axle holder with a strip of paper.

Step 2:

Mount the motor Insert the small gear or pulley onto the motor's shaft. Place the motor on the self adhesive motor mount and strap it securely and snugly. Place the motor on the car while the car is on a flat surface. Move it towards the gears until the gears engage. Mark the location of the motor. Avoid too much pressure on the gears because it will increase the friction and make it difficult for the car to move.   If you use pulleys to transmit force, motor must be mounted away from the pulley so that the rubber belt is slightly stretched.Carefully peal off the protective cover of the adhesive pad. Make sure you will not remove the adhesive pad itself. Place the motor where you already marked. Push it down firmly to stick in place. Mount the rubber band belt between the wheel pulley and the motor pulley.

8. Locate the straw from the kit. Also get scissors and glue gun.
9. Cut straw in half
10. Using the glue gun, attach the straws to the bottom of vehicle, one at each end (parallel to the end)
11. Locate the axles through each straw.
12. Push one wheel into each axle.
13. Insert and axle through each straw.
14. Carefully place the remaining wheel onto each axle.
    Note: This completes construction of the basic solar vehicle.
15. Locate the solar cell Panel and the required parts for the propulsion system chosen gears, pulleys, propeller, or rubber band. (Gears are supplied, Pulleys and propellers are optional.
16. Assemble and attach the propulsion system as designed.
17. Finish your solar racer as desired using paint, markers, etc.
18. Race the assembled vehicle on a flat surface in a sunny day.

Simple electric circuit

Combine the joy and excitement of mechanical toys with your science project by constructing an air propelled motor boat. This is also a good way of learning about  simple electric circuits. Your boat will have a battery, a switch and a motor with propeller. This can be used as a science project related to electricity, force or floatation. This idea is good for a display project, an engineering project and an experimental (investigatory) project. The main structure is made of Styrofoam board that is available at hardware stores and home improvement stores.

Material used in this project are: Simple Switch, Electric Motor, Battery Holder, Propeller, Screws and Wire. All the materials are from the "Car Boat Kit". This kit also include wheels and axles in case you need to convert your boar to a hybrid vehicle that can drive both in dry land and in water.

Procedure: Start by cutting the foam. You can cut the Styrofoam easily with utility knives. Just practice for a few minutes and you will get the grip on it. Hold the knife in a sharp angle and don't push too much. You may need to go over the same line a few times until you get a clean cut. Styrofoam boards can be glued using white glue or wood glue. They can also be painted using any latex paint or water based paint.

Feel free on making your own design. Just reserve a place where you can place the electric motor and secure it with tape.Battery is a heavy piece; it must be centered in order for your boat to have a balance on water. Adjustments may be made by placing other heavy objects onboard.

Please note that with this method you are not restricted to a boat. You may also make a car that drives by pushing the air backward. You just need four wheels and four nails. Make sure that the wheels are large enough and can spin freely.To hide the battery and switch, you may also use some cardboard to make a cabin and place it over those parts.

The boat that you see in the picture does not have a steering mechanism. You may try different possible methods to construct a steeling mechanism in your boat.

Finally you can make a vehicle that can drive both on land and in water. To do that simply attach the wheels to the sides of the boat.If you did not get sheaves in your kit, use the wheels of any plastic toy car instead.

Two pictures of a simple air propelled electric car. With some creativity and artwork you can make this a must better project.

The Kit Contains the electric motor, simple switch, battery holder, wire, light bulb, screw base for light bulb, wire, screws and propeller.You will need additional material and tools such as Styrofoam board, wood, nail, water color, screw driver, battery and utility knife. The electric circuit you make in this project is a simple electric circuit containing a power source (battery), a switch and a resistor (the motor).

Making an electric generator is a good way of learning the principles of generators. It also is an exciting science project.  As a display project, you just need to make it and demonstrate its structure. As an experimental project, you need to come up with questions about the factors that may affect the rate of production of electricity.

1. How does the speed of turning affect the production of electricity?
2. How does the diameter of wire coil affect the amount of electricity?
3. How does the number of loops of wire in the coil affect the amount of electricity?
4. How does the diameter of coil wire affect the electric current?
5. How do the material used in the construction of an electric generator affect the production of electricity?

1. Wood dowel 3/8" diameter
2. Wood Dowel 1" diameter.
3. Rod magnet 3" long
4. Insulated copper wire 
5. 1.2 Volt Screw Base light Bulb
6. Base for the light bulb
7. Small sand paper
8. Wood Glue
9. 1/2 Square foot Balsa wood (1/8" diameter)

1. Cut two square pieces from the balsa wood (3.5" x 3.5").
2. Make a 3/8" hole in the center of each square.
3. Cut four 1" x 3 7/16.
4. Cut a 3/4" piece from the 1" wood dowel. Make a 3/8" hole in the center of it. Insert a 6" long 3/8" wood dowel in the hole, apply some glue. center it and wait for it to dry. 
5. Make another hole with the diameter of your rod magnet in the center of the larger wood dowel piece for the magnet to go through.

Wood dowels after completing the step 4

Wood dowels after completing the step 5

1. Insert the magnet in the hole of the wood dowel. Center it and use some glue to secure it.
2. Use one large square balsa wood and four smaller rectangular balsa woods to make a box.
3. Insert your wood dowel into the hole in the center of the box. At this time the magnet is inside the box.
4. Place the other large square to complete the box. Apply some glue to the edges and wait for the glue to dry. By now, you have a box and inside the box you have a magnet that can spin when you spin the wood dowel.
5. Wrap the copper wire around the box and use masking tape to secure it. Note that more copper wire around the box results more electricity.
6. Remove the insulation from the ends of the wire and connect it to the screws of the bulb holder or base. 
7. Insert the light bulb
8. Spin the wood dowel fast to get the light.

The high quality parts included in this science set may be useful for many of your future projects. All parts other than balsa wood are reusable. You may purchase additional balsa wood from craft stores for your future projects.