The Mechanics Behind the WaterCar Python

Dave March, a car designer and builder, faced a significant challenge: safely reaching 52 mph (45.2 knots) on water with a 14-foot (4.3-meter) car. The V-hull design demanded excessive power to cut through waves, hindered by displacement issues and the initial car model's limitations. March sought both speed and superior performance.

Indeed, you read that right. March, who began his career in California's automotive industry during the mid-1970s, ventured into the often-mocked realm of amphibious vehicles and has now revolutionized it. His latest innovation, the WaterCar Python, transforms a convertible roadster of ambiguous origins into a high-speed machine capable of reaching over 60 mph (52 knots) on water. This follows its impressive land performance, boasting a top speed of 125 mph (201.2 km/h), a 12-second quarter-mile sprint, and acceleration from 0 to 60 mph in under five seconds.

"Dave's philosophy is to elevate anything he encounters to new heights," explained Fred Selby, spokesperson for WaterCar. "He thrives on tackling difficult challenges."

The Python stands apart from the Amphicar, the slow yet reliable classic often seen in July 4th lake parades nationwide. Equipped with a General Motors LS1 to LS9 engine, it could rival Virgin Atlantic CEO Richard Branson's 2004 English Channel crossing in an English Gibbs Aquada. Whether it performs as well internationally as it does domestically remains to be seen. Despite its $170,000 price tag for the rolling chassis (without engine and transmission), the Python's unique appeal has already sparked widespread interest.

Though still undergoing design refinements and improvements, the Python has the potential to elevate amphibious cars from mere novelties to high-performance machines.

Continue reading to discover what sets the WaterCar Python apart as a top-tier amphibious vehicle.

What's Under the Hood (Or in the Hull)

To grasp the Python's innovation, one must first explore WaterCar's initial creation, the Gator. The Gator combines a Volkswagen Beetle chassis with Jeep CJ components to craft what might be the ultimate fishing companion.

"The goal was to design a vehicle that could take you to the lake, drive straight into the water, and transport you to your preferred fishing spot," explained Selby.

At the core of the Gator lies a floating body and a mechanical shell made from fiberglass and flotation foam. Mounted on a VW pan chassis and equipped with a custom gearbox for seamless transition from car to boat, it enables anglers to hit the water with just a lever shift.

Dave March and WaterCar evolved the concept of an integrated hull and mechanical system, prioritizing performance and aesthetics. They aimed for a sleek, eye-catching design that would make waves at the lake.

"March examined other amphibious vehicles and declared, 'I want this to go faster,'" Selby recalled. Early prototypes, inspired by Camaro designs, fell short of the desired performance standards.

After numerous iterations and rigorous testing, the design evolved into a unique hybrid: a rear resembling a Corvette and a front akin to a boxy convertible sedan. For boating enthusiasts, the Python didn’t resemble any conventional boat, yet it performed flawlessly on water. WaterCar achieved its mission, creating a vehicle that excels in speed and performance both on land and water—a feat few companies dare to attempt, let alone master.

"Developing something like this requires a dual mindset," Selby remarked. "Is it a car, or is it a boat? You address one challenge for the car, then tackle another for the boat."

Next, discover how WaterCar overcame the numerous challenges of merging car and boat functionalities, including the complexities of steering on both land and water.

Where the Rubber Meets the Water

Selby explained that the initial WaterCar Python models focused on generating power and refining the design to propel a 3,800-pound (1,724-kilogram) boat through water, though the actual weight was closer to 5,000 pounds (2,268 kilograms). While car-specific challenges were largely resolved, as were boat-specific ones, the real hurdle was integrating the two systems seamlessly, particularly for high performance.

"Some of the early engines we tested didn’t meet expectations," Selby noted. This included a Subaru engine that failed after just a few uses. They ultimately chose the General Motors LS series, a lightweight, V-8 crate engine available in various power levels, renowned for its role in the Corvette Z-series.

The Python’s current engine delivers around 450 horsepower. Selby mentioned the company is testing a 650-horsepower version. The LS crate engines are positioned at the rear, powering both the rear wheels and the propulsion system via a custom Mindiola gearbox.

Selby highlighted the reliability of the LS engines, with no failures reported so far, and their affordability—around $8,000 for the 450-horsepower model. However, upgrading to the 650-horsepower version would cost approximately $26,000 for the engine alone.

Parallel to engine development was the evolution of the hull design. The Gator featured a V-hull, or displacement hull, which capped its water speed regardless of engine power. In contrast, the Python employs a planing hull, allowing it to glide on the water’s surface at higher speeds, similar to racing boats. "With a planing hull, speed becomes virtually limitless," Selby said. "We’ve hit 60 mph on water, which is more than enough for me."

With technical challenges resolved, the company shifted focus to refining the Python’s aesthetics and functionality. On the next page, we’ll explore the transformation from car to boat and the unique hurdles Python owners might encounter.

WaterCar Python Design

Transitioning from land to water remains a significant challenge for amphibious vehicles, and the Python is no exception. However, advancements in marine technology have made this process smoother compared to earlier models.

Selby highlighted the Python’s water jet propulsion system as a key advantage, eliminating the need for a rear-mounted propeller. The LS engine and Mindiola gearbox collaborate to deliver power and torque to the propulsion unit. This unit, currently undergoing testing with various commercial models, uses an impeller to draw in water, creating a powerful stream that propels the vehicle. Steering is achieved by directing this stream through an adjustable nozzle.

With no propeller required and the compact propulsion unit neatly concealed at the rear, Selby explained that the Python’s steering remains consistent whether on water or land—controlled entirely by the steering wheel.

"Turning the steering wheel left makes the vehicle go left," he stated. "This design prioritizes safety. We avoided separate steering systems for land and water to keep things straightforward and secure."

As the Python glides through the water, onlookers will notice the wheels turning, though they don’t function as rudders. Instead, the water propulsion nozzle beneath the surface directs the water stream to steer the vehicle.

Another innovative feature is the Python’s retractable wheels. An air suspension system with opposing air shocks lifts and lowers the wheels when transitioning between water and land. This system also provides a smoother ride by absorbing bumps on the road.

One of the most significant hurdles was engine cooling. While the propulsion unit is water-cooled, the engine relies on a standard air- and liquid-cooled system. This posed a challenge on water, where the engine couldn’t cool itself as effectively as on land.

The company resolved the engine cooling issue by isolating the cooling system and positioning it to function effectively on water. Cool air is channeled from the car’s front to the rear engine compartment, seamlessly integrating this system into the Python’s design without compromising aesthetics.

The Python’s allure lies in its James Bond-esque appeal—a boat that strikingly resembles a car gliding across the water. However, the company also accommodates customization, allowing buyers to tailor the vehicle to their preferences, given its premium price and bespoke nature.

Continue reading to explore the Python’s customization options and the unique requirements for operating this exceptional vehicle.

WaterCar Python Development and Evolution

In 2006, when the insights from the Gator project merged with Dave March’s vision for a groundbreaking amphibious car, Selby admitted they were unsure of the path ahead. "Our goal was clear—to create the ultimate amphibious vehicle," he said. "The challenge was figuring out how to achieve it."

Instead of starting from scratch, the company built on the Gator’s foundation, leveraging existing technology (like Jeep CJ components) and adapting it to their needs. This approach was ideal for a resource-constrained car manufacturer. "We drew inspiration from various makes and models," Selby explained.

However, their creative process sometimes took unexpected turns. For example, the Python features a wrap-around rear bench seat inspired by lake cruisers, paired with captain’s chairs in the front. "It was an experimental design choice," Selby noted. "The Python is still evolving, and we’re exploring what works best. Customers can customize it to their comfort and preferences."

Buyers of the Python rolling chassis can select their preferred engine and transmission, opting for factory assembly or a DIY project. Once assembled, the vehicle must be assigned a Vehicle Identification Number (VIN) by the state of registration.

Owners must then register the Python as both a car and a boat, securing license plates and watercraft decals as mandated by their state. The Python comes pre-equipped with lights for both modes. Insurance options include separate plans for land and water use, with some providers offering specialized amphibious car insurance.

WaterCar recommends entrusting the Python to a skilled hot rod mechanic with marine expertise. Maintenance mirrors that of both boats and cars, combined into one vehicle. Ocean use demands additional upkeep, akin to other saltwater vessels.

From Selby’s viewpoint, maintenance is an inherent aspect of owning such a unique vehicle. Extraordinary machines require extraordinary care, and Python buyers are typically prepared for the specialized needs and associated costs.

Selby noted increasing global interest in the Python, with inquiries from Turkey, the Middle East, China, and beyond. WaterCar is nearing its undisclosed order limit, paving the way for transitioning from custom builds to faster assembly line production—potentially reducing costs. Meanwhile, the company continues refining and evolving the Python.