MOUSETRAP POWERED CARS

Our Lever Arm and Axle Pack comes with twenty 6" inch axles and ten 12" inch lever arms. You get a complete set of axles and lever arms to build 10 mousetrap powered vehicles. Lever arms and axles are made of high quality, light weight, brass tubing that can easily be cut to any length. Our lever arms are designed to fit perfectly over a cut mouse trap's snapper arm without modification in order to change the pulling force and control both the speed and travel distance of a mousetrap powered vehicle. Order as many sets as you need for your next large group activity and save money.

Because performance matters, we use light weight brass tubing for in all our top performing kits instead of wooden dowels and steel rod. Brass tubing axles are lighter, and spin with less friction than wooden dowels. Also, brass tubing axles will not warp like wooded dowels used in many of our competitors kits so with our brass tubing axles your STEM vehicle project will travel smoother, faster, with less wobble, and with less wasted energy. You are guarantee to see and increase in both the top speed and the travel distance of any mousetrap and/or rubber band vehicle project when you use brass tubing axles.

Top Highlights:

• Save time and money when you order in bulk. This is a complete bulk pack of 10 Brass Lever Arms and Axles. Ideal for your next large group STEM project based activity.
• Our Lever Arm and Axle Pack comes with twenty 6" inch axles and ten 12" inch lever arms.
• A complete set of axles and lever arms to build 10 mousetrap powered vehicles.
• Made of high quality, light weight, brass tubing that can easily be cut to any length.
• Lever arms are designed to fit perfectly over a cut mouse trap's snapper arm without modification.
• Comes with lightweight, 3/16" inch diameter brass tubing axles that spin freely with less friction for an increase in both speed and distance. Brass tubing axles do not warp like wooden dowels and provide for a much smoother ride without wobble.
• Perfect for mousetrap cars, rubber band racers, balloon vehicles, and/or all STEM science vehicle projects.
• All our products are 100% made in the U.S.A by Doc Fizzix in Spicewood, TX.

Includes the following:

• 20x - 6" inch Brass tubing axles
• 10x - 12" in Brass lever arms

Weight : 2.1 oz.

Pulling Distance and Travel Distance

When it comes to building a top performance mousetrap powered vehicle gearing is probably the most important concept every builder needs to understand. Gearing is how you control both the speed and the pulling distance for any mousetrap powered car. In order to understand gearing you will need to understand the following three terms:

• Gearing.
• Pulling Distance.
• Total Travel Distance.

The gearing of a mousetrap vehicle is determined by three components, the length of the mousetrap's snapper lever arm, the diameter of the drive axle, and the diameter of the drive wheels. By attaching a lever arm to a mousetrap's snapper arm you can control both the pulling force and the amount of string that can be wound around the drive axle. The amount of torque delivered by the mousetrap's spring does not change but you can change the amount of pulling force delivered to the drive axle by changing the length of the mousetrap's lever arm. A longer lever arm decreases the pulling force but extends that pulling force over a greater distance. Shorter lever arms deliver a larger pulling force to the drive axle but have a shorter pulling distance. If you want to build a good long distance traveling mousetrap car then you will want a longer lever arm that has a smaller pulling force but that force acts over a greater pulling distance. Longer lever arms will give your vehicle more wraps of string that can be wound and unwound from the drive axle. If you want to build a good speed-trap racer then a shorter lever arm will generate more force for a greater acceleration but over a shorter pulling distance. The ratio of the drive wheels diameter to the drive axle diameter also play an important part in the gearing of a mousetrap racer, but the most common way to control both the speed and the pulling distance for any mousetrap powered car is by changing the length of the lever arm.

The pulling distance is a measure of the maximum distance a vehicle can be pulled under the force of the mousetrap's spring. The pulling distance is determined by the length of the lever arm attached to the mousetrap along with the axle and wheel ratio. The axle and wheel ratio determines the linear distance a mousetrap vehicle will travel for each wrap of string pulled from the drive axle. The lever arm length determines how many wraps of string can be wound around the drive axle. The more wraps of string that can be unwound from the drive axle means the greater the pulling distance. The total length of string that can be unwound from the drive axle is, at its maximum, twice the lever arm length.

Low inertia axle system

Our lightweight, 3/16" inch brass tubing axles spin with less friction than wooden dowels for an increase in both the speed and the travel distance of your vehicle. Lightweight brass-tubing axles will not warp like wooded dowels and have a lot less mass than steel axles used in many of our competitors kits so our vehicles will travel smoother, with less wobble, and less wasted energy for an increase in both speed and travel distance.

Same Day Shipping!

All orders received before 12:00 p.m. CST are processed and ship on the same day as long as the item(s) are in stock; orders received after 12:00 p.m. CST will be processed and shipped on the following business day as long as the item(s) are in stock. Online orders take priority over phone and mail orders and therefor ship with a priority level of Burning-Red-Hot. Because of the extreme popularity of Doc Fizzix Products, items can go out of stock without warning. If an item goes out of stock, it will ship as soon as the item is back in stock with a priority level of Super-Duper-Burning-Red-Hot.

** OUR SERVICE PROMISE TO YOU **

** All in-stock orders placed before 12:00 p.m. CST ship same day **

** Shipments are Monday through Friday **