Readers ask: How To Build A Rat Trap Car?

How do you make a rat trap car go far?

Use thin, light wheels.



Thinner wheels have less friction and may go farther if the distance is what you want or need with your mousetrap racer. It’s also important to take the weight of the wheels themselves into account — any unneeded weight will ultimately slow your car down or lead to added friction.

How do mousetrap cars work?

A mousetrap powered car is a vehicle that is powered by the energy of a wound-up mouse trap’s spring. Once the drive axle and mouse trap are released the string is pulled from the drive axle by the mouse trap and this causes the drive wheels to rotate.

How do you make a mousetrap car reverse?

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.

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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.

Why is my mousetrap car not moving?

If a mousetrap vehicle is struggling to move and/or needs more acceleration then the lever arms can be shortened in order to increase the pulling force. Keep in mind that you will also have to reposition the mouse trap closer to the drive axle or the system will not work as intended.

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.

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.

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.

How does a mousetrap kill?

Traditional snap traps, also known as spring loaded-bar mousetraps, are commercially available and widely used. Snap traps are placed along pathways rodents travel, and an attractant such as food or nesting material can be used. When the spring mechanism is triggered, a metal bar snaps and kills the rodent.

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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.

What happens if the mousetrap is mounted too far from the drive axle?

What happens if the mousetrap is mounted too far from the drive axle? You will lose pulling force or energy to friction. The energy goes too quickly and you lose pulling force.

How do you stop a mousetrap car?

Adding Traction to Wheel



Adding traction to a wheel will give the wheel more grip and greater stopping potential. One way to increase the traction of a wheel on smooth surface is to add a rubber traction tread that has more grip than the original wheel alone.

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.

How do you wind a mousetrap car?

As the string is wound around the axle by the turning of the wheels, the snapper’s lever arm is pulled closer to the drive axle causing the mousetrap’s spring to “windup” and store energy. When the drive wheels are released, the string is pulled off the drive axle by the mousetrap causing the wheels to rotate.

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