RUBBER BAND POWERED RACER KITS

Named for the wind, The Zephyr is a small, lightweight, economically priced, and easy-to-build propeller-driven rubber-band racer designed to travel a 5 meters in 1 second or less. Perfect for any first time builder, The Zephyr comes ready-to-assemble with pre-cut and pre-drilled parts so you can be ready for action and racing on the same day. The Zephyr is powered by a twisted rubber band motor that, when released, converts stores potential energy into kinetic energy or energy of motion. The Zephyr generates a tremendous amount of thrust with its large 5" inch propeller. Our 5" inch propellers are designed to move large amounts of air because of the pressure difference created by the shape of the blades making the Zephyr the fastest propeller powered racer available anywhere capable of traveling 5 meters in under one second. As with all our kits, The Zephyr Kit comes with with our complete step-by-step instruction guide that is filled with tons of top secret performance tips and tricks that have been developed exclusively by Doc Fizzix, with over 30 years of experience, so you will have all the information you need to make your rubber band powered car project a winner.

Travel Speed:

5 meters in 1 second*

Top Highlights:

• Fastest rubber band powered propeller racer anywhere designed to travel 5 meters in less than 1 second.
• Uses twisted rubber band motor to generate thrust and propulsion.
• Includes 5" inch propeller that converts stored potential energy from the rubber band into air propulsion.
• Comes with super-low inertia wheels for increased speed and acceleration.
• The perfect rubber band vehicle kit for beginners and seasoned veterans alike. Designed and engineered for your success. Comes ready-to-assemble with pre-cut and pre-drilled lightweight balsa wood frame.
• Finished vehicle measures approximately 2" x 3" x 9" inches (H x W x L)
• All our products are 100% made in the U.S.A by Doc Fizzix in Spicewood, TX.

Assembly Time:

The Zephyr Kit can be assembled in less than 30 minutes for most first time builders and when finished it will travel 5 meters in less than one second.

Skill Level:

Required Skills

• Able to measure with a ruler in both inches and/or centimeters.
• Experience working with wood glue and/or Cyanoacrylate glues (Super Glues).
• Able to glue two pieces of balsa wood together.
• Able to use needle nose pliers to cut and bend wire.

Recommended Skills

• Able to sand parts to make them smooth.
• Can problem solve during construction and make adjustments.
• Can determine how to make adjustments to improve performance.

Tools Required:

• Needle-nose-pliers
• Wood or Super glue

*Kits require assembly, actual results will vary and depends on the constructions skills of the builder, glue and tools not included.

Includes the following:

• 5-inch propeller and bearing
• Rubber band
• Pre-cut and pre-drilled balsa wood frame
• Low inertia wheels
• lightweight metal wire axles
• Step-by-step plans with performance tips and tricks

Propeller Propulsion

It is a basic law of physics as stated by Isaac Newton that, if you want to move forward, you have to push backwards. This law of motion is better known as Newton's Third Law of motion often called the law of action reaction. A propeller work because of this principle. A propeller’s turning motion produces a difference in pressure between the front and the back surfaces of it's blades creating what is known as thrust. It is this thrust that pushes air in one direction in order to push the Zephyr in the opposite direction. The amount of thrust generated by a propeller depends on the speed that the propeller rotates and the pressure difference created by the propeller blade's front and back surfaces. Our propellers are designed to move large amounts of air because of the large pressure difference created by the shape of the blades. We did our homework when trying to find the best possible propellers available for this racer. Because of the propeller we selected and the design of The Zephyr itself, it is the fastest prop-powered racer available anywhere capable of traveling 5 meters in under one second.

Ultra-thin, low-inertia Dragster wheels and Axle System

One of the design secrets that make The Zephyr Kit a guaranteed winner is it's ultra-low inertia Dragster Front Wheels and wire axle system. The Zephyr Racer Kit uses our exclusive ultra-low inertia dragster wheels that allow The Zephyr Racer to glide across the floor on a cushion of air, converting more of its stored energy into the overall speed of the racer itself. Because less energy is needed to overcome the inertia of the wheels, The Zephyr Racer Kit will have a greater acceleration and top speed compared to simpler vehicles using wheels with much greater rotation inertia. Remember, it is all about energy! You start with a limited amount of stored potential energy because of the twisted rubber band. If wheels have a lot of rotational inertia, then more energy will be needed to rotate the wheels and less energy will go into the forward motion of the racer itself. Because of our ultra low inertia Dragster wheels, The Zephyr Racer will have a much greater acceleration off the line and a much higher top speed for a recored finish.

Along with our ultra low inertia Dragster wheels, The Zephyr Racer uses an extremely small, 1/32 inch diameter axle. This means that wheels spin with less resistance torque and less friction trying to slow the wheels down. Because less energy is lost to friction wheels spin with less effort and with less wasted energy compared to wheels that spin on larger diameter axle systems. The Zephyr Racer will travel further and faster because there is less overall friction acting on the over all system, there is a greater conversion of potential energy into the overall kinetic energy of the racers itself.

Easy to Follow, Step-by-Step Instructions

As with all our vehicle kits, The Zephyr Kit comes with our complete step-by-step instruction guide that is written the for the visual learner filled with tons of top secret performance tips and tricks that have been developed, tested, and perfected exclusively by Doc Fizzix, with over 30 years of experience, so you will have all the information you need to make your prop-powered vehicle project a success. Our easy to follow, step-by-step instructions are filled images and diagrams designed to eliminate the guess work. You will feel confident and feel like a professional builder as you follow our detailed step-by-step instructions.

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 **