FAQ: How To Build A Mousetrap Car With Cds?

What is the best way to build a mousetrap car for distance?

Use large rear wheels.



In practice, this means that once they start rolling, they’re harder to stop rolling. This makes large wheels perfect for distance-based contests — theoretically, they’ll accelerate less quickly than smaller wheels, but they’ll roll much longer and they’ll travel a greater distance overall.

What materials do you need to build a mousetrap car?

What You Need:

  • Wooden snap-back mousetrap.
  • Duct tape.
  • 4 eye hooks.
  • Wooden dowel that fits inside the eye hooks.
  • Heavy cardboard.
  • Large and small rubber bands.
  • Foam board (usually found at a craft store)
  • String.

What is the fastest mousetrap car?

Description: The Speed-Trap Racer is the fastest mousetrap powered racer anywhere and was designed after Doc Fizzix’s own record-setting mousetrap racer that traveled 5 meters in 1.2 seconds.

What makes a mousetrap car go faster?

Making The Vehicle Faster

  • Thicken the axle: Wrapping some tape radially around the axle or adding a spool. It may be surprising as to how much faster this makes the vehicle.
  • Use smaller wheels. They will require less force to complete a rotation.
  • Make the vehicle lighter.
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How do you use CDs as wheels?

Attach CDs to the axles to form wheels. Do this by stuffing a piece of sponge into the hole in the middle of the CD, then using tape to secure the CD and prevent it from wobbling. Make sure your car can roll smoothly. Put it down on a flat surface and give it a push.

What is an axle hook?

An important part of a mousetrap vehicles propulsion system is the axle hook. If the string does not properly release from the drive axle the string will rewind around the drive axle and cause the mousetrap car to come to an instant stop.

How do you make a mousetrap car go backwards?

To make a reversing mousetrap car go forward and then come back you will need to know how to “back-wind” the string. Back-winding the string it a technique where you first wind the string around the axle in one direction and then rewind the string in the opposite direction.

How long should the string be on a mousetrap car?

Calculating minimum distance



The length of the string is about 25″. Therefore the string can be wrapped around the dowel 25/0.785 = About 31.8 times.

How does friction affect a mousetrap car?

The axle spins while the body of the car does not, creating friction. This friction adversely affects the motion of the vehicle, slowing the spin of the axle during and after the release of the mousetrap. The greater the friction between axle and body, the shorter the distance of travel.

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How do mousetrap cars reduce friction?

Use a small axle to reduce friction. A large diameter axle will contact the bearing farther away from the center of the axle than a small diameter axle will. The farther from the center a force is, the more effect it has.

When designing a trap car What are the 2 variables that truly determine performance?

In general, mousetrap competitions have two categories, speed and distance. If you want to optimize for speed, you’ll want to design a car that exerts as much force/rotation as possible on the wheels as fast as possible.

Can mice get in car?

How Do Mice Get in Cars? Due to the small size of mice, it’s easy for them to squeeze through openings smaller than a dime. In most cases, they’ll crawl up from under the engine and make their way to other areas once inside.

How long should the lever arm be on a mousetrap car?

For maximum speed, position the mousetrap 2 1/4 inches from the drive axle and cut the lever arm to a length of 4 1/4 inches. The lever arm can be cut using a dremel tool or by using a fine tooth hobby saw. The lever arm should always be “just” long enough to reach the drive axle or performance will be compromised.

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