Ben Franklin’s weak motor sounds like the setup to a joke about a Founding Father whose car would not start. In reality, it points to one of the strangest, smartest, and most overlooked branches of motion technology: electrostatic locomotion. Long before electric cars, drone motors, factory robots, and pocket-sized vibration motors became ordinary, inventors were trying to make things move with sparks, charged glass, Leyden jars, metal points, ion winds, and a heroic amount of curiosity.
Most people know Benjamin Franklin for the kite, the lightning rod, bifocals, and the ability to look wise on American money. Fewer people know that he also designed an early electric motor in the 1740s. It was not a muscle-bound machine. It was not going to pull a wagon, power a mill, or win a drag race unless the other vehicle was a sleepy snail. But it rotated. It proved that electric charge could become mechanical motion. And in the history of forgotten locomotion, that is a very big spark.
This article explores Franklin’s electric wheel, why electrostatic motors faded behind electromagnetic motors, and how a few “forgotten” ideascorona motors, electric whirls, ion propulsion, capacitor motors, and silent solid-state flightare still whispering from the attic of engineering history.
What Was Ben Franklin’s Weak Motor?
Franklin’s early motor is often called an electric wheel or an electrical jack. Around 1748, Franklin experimented with high-voltage static electricity stored in Leyden jars, which were early capacitors. His wheel used small conducting elements attached around a rotating structure. As the wheel approached charged terminals, electrical attraction and repulsion pushed the rotor around.
In simple terms, Franklin found a way to make a wheel turn by letting electric charges do the shoving. Instead of magnets pulling iron or current flowing through coils, the machine used the basic rule every sweater-and-doorknob victim knows personally: electric charges attract and repel.
Was it powerful? Not by modern standards. Calling it “weak” is fair, but only if we say it with respect. A baby motor is still a motor. Franklin’s device could spin fast enough to impress observers and was reportedly strong enough that he imagined practical uses, including a rotating cooking setup. Yes, one of America’s most famous thinkers looked at an early electric motor and thought, “Excellentturkey.” Science marches forward on many fuels, and hunger is one of them.
Electrostatic Motors vs. Electromagnetic Motors
To understand why Franklin’s motor mattered, it helps to compare two families of electric motion.
Electrostatic Motors
Electrostatic motors use electric fields, voltage, and the attraction or repulsion of charged surfaces. They usually need high voltage but very little current. Their parts can be simple: plates, combs, disks, points, rotors, and insulating materials. They are elegant in the way a spiderweb is elegantlight, clever, and slightly alarming if you walk into one unexpectedly.
Electromagnetic Motors
Electromagnetic motors, the kind most people use every day, rely on magnetic fields created by electric current. These motors often use copper windings, iron cores, magnets, and rotating magnetic fields. They power fans, washing machines, power tools, electric vehicles, elevators, industrial pumps, and nearly everything else that hums, spins, or makes a suspicious noise in the garage.
Electromagnetic motors became dominant because they scaled beautifully. They could produce serious torque, handle practical loads, and connect well with batteries and later power grids. Franklin’s electrostatic motor was brilliant, but it belonged to a world where static electricity was easier to demonstrate than to harness for heavy work.
The Electric Whirl: Spinning Before Franklin Got There
Franklin was not alone in exploring early electrostatic motion. One related device, often called the electric whirl, used sharp points mounted on a rotating arm. When high voltage was applied, charge escaped from the points into the surrounding air. The reaction force made the device spin.
This was not a motor in the modern industrial sense. It was more like a tiny electrical weather event on a stick. But it demonstrated something profound: electricity could produce motion without gears, belts, steam, animals, or someone named Earl pushing from behind.
The electric whirl also introduced a theme that returns again and again in forgotten locomotion: sharp electrodes, charged particles, and air movement. That same family resemblance appears later in corona motors and ion wind propulsion.
Poggendorff’s Corona Motor: Motion From Electric Wind
In the nineteenth century, German physicist Johann Christian Poggendorff developed a corona motor, a more refined electrostatic machine. A corona motor uses high voltage at sharp points or electrodes to ionize nearby air. The charged particles move through the electric field and transfer momentum to the rotor or surrounding air.
Unlike Franklin’s wheel, which depended on charging and discharging conductors around a rotating structure, the corona motor leaned into the behavior of ionized air. It used the mysterious-looking glow and hiss of high voltage not merely as a party trick for science clubs, but as a source of mechanical movement.
Corona motors are fascinating because they blur the line between motor and propulsion system. Are they spinning because charges are pushing the rotor? Because ionized air is flowing? Because invisible electrical forces are doing a tiny ballet? The answer can be “yes,” depending on the design. Engineering history is full of machines that refuse to fit neatly in one drawer.
Why Forgotten Locomotion Was Forgotten
Many early electric motion ideas disappeared from mainstream use for practical reasons, not because they were foolish.
1. They Were Hard to Scale
Electrostatic force works well at small scales and with very close gaps. But when engineers wanted large machines to perform useful work, electromagnetic motors offered better power density and reliability. Franklin’s wheel was clever, but it was not going to run a factory line.
2. High Voltage Was Awkward
Electrostatic motors often require high voltage. In laboratory demonstrations, that is exciting. In everyday machinery, it becomes an insulation, safety, and reliability headache. Sparks are fun until they start choosing their own schedule.
3. Materials Were Limited
Early inventors lacked modern dielectric materials, precision manufacturing, advanced fluids, and compact electronics. An idea that seemed impractical in 1750 or 1870 might become useful when better materials arrive two centuries later.
4. The Power Grid Favored Electromagnetism
As generators, distribution systems, and industrial machinery developed, electromagnetic technology became the standard language of electric power. Once factories, tools, and infrastructure spoke that language, alternative approaches had to prove not just that they worked, but that they were worth switching to.
Faraday, Jacobi, Tesla, and the Motor Family Tree
Franklin’s electrostatic wheel belongs to the early root system of electric motion, but the main trunk grew in another direction. Michael Faraday demonstrated electromagnetic rotation in the early 1820s, showing that electric current and magnetism could produce continuous motion. This was a turning pointliterally and historically.
Later, Moritz Jacobi built more powerful electric motors in the 1830s and famously used one to drive a boat carrying passengers. That was a major step from demonstration to transportation. The idea of electric locomotion moved from “look, it spins” to “look, people are crossing water and trying not to look nervous.”
By the late nineteenth century, inventors such as Nikola Tesla and Galileo Ferraris advanced AC induction motors. These machines eliminated brushes and commutators in many applications and helped define the modern electrical age. The induction motor became one of the quiet giants of civilization: not glamorous, not chatty, but always working.
In that family tree, Franklin’s weak motor is less like the final ancestor of every modern motor and more like a strange, brilliant cousin who showed up early, brought sparks, and left before the paperwork was done.
Ion Propulsion: The Forgotten Idea That Went to Space
One of the most exciting forms of forgotten locomotion is ion propulsion. Instead of burning fuel like a chemical rocket, an ion thruster accelerates charged particlesoften ions of a gas such as xenonthrough electric fields. The thrust is gentle, but it can continue for long periods, making it extremely useful for certain spacecraft missions.
Ion propulsion feels like the spiritual descendant of early electrostatic experiments. Franklin’s wheel used electric charge to turn a rotor. Ion thrusters use electric fields to throw charged particles backward so a spacecraft moves forward. The physics is different in detail, but the family resemblance is clear: charge becomes motion.
The funny part is that ion engines are not dramatic in the way movie rockets are dramatic. They do not roar like dragons or shake the ground. Their thrust can be tiny. But in space, where patience is a superpower, a small push applied for a long time can accomplish extraordinary travel.
Ion Wind and the Dream of Silent Flight
Electrohydrodynamic propulsion, often called ion wind propulsion, uses high voltage to ionize air. The charged particles accelerate and collide with neutral air molecules, creating airflow and thrust. No propeller is required. No turbine blades. No spinning rotor yelling at the neighborhood.
In 2018, researchers at MIT demonstrated a small fixed-wing aircraft powered by ionic wind. It was not a passenger jet. Nobody was boarding with luggage, snacks, and unrealistic legroom expectations. But it proved that solid-state propulsion could sustain flight in a carefully designed lightweight aircraft.
This is exactly why forgotten locomotion matters. Some ideas are not dead; they are waiting for better batteries, better materials, better modeling, and engineers stubborn enough to ask, “What if the weird old idea was not wrongjust early?”
Modern Electrostatic Motors Are Making a Comeback
Today, electrostatic motor research is no longer just a museum curiosity. Modern companies and university researchers are revisiting capacitive and electrostatic motor designs using materials Franklin could not have imagined. Some modern designs use printed circuit board structures, carefully controlled gaps, advanced power electronics, and dielectric fluids that allow higher voltages without immediate electrical breakdown.
The potential appeal is big: less reliance on copper windings, fewer rare-earth magnets, reduced heat losses, and strong efficiency in certain applications. That does not mean electrostatic motors will replace every conventional motor. The electric motor world is not a superhero movie where one technology defeats all others in the final act. More likely, electrostatic machines will find specific niches where their strengths matter most.
Microelectromechanical systems, or MEMS, are another area where electrostatic actuation already makes sense. At very small scales, electrostatic forces become especially useful because tiny moving plates and comb-like structures can be made using semiconductor-style fabrication. In miniature devices, Franklin’s old physics suddenly looks modern again, wearing a lab coat and pretending it was never out of fashion.
The Engineering Lesson: Weak Does Not Mean Worthless
The phrase Ben Franklin’s weak motor is useful because it reminds us not to judge inventions only by their first performance. Early airplanes were fragile. Early computers were room-sized divas. Early cars broke down so often they practically came with a mechanic as standard equipment. Early electric motors were no different.
A weak motor can still be a strong idea. Franklin’s electric wheel showed that electrical energy could create rotary motion. It did not solve industrial power. It did not launch a motor company. It did not transform transportation overnight. But it helped expand the imagination of what electricity could do.
Forgotten locomotion is full of these almost-successes: clever machines that were too early, too delicate, too expensive, too unsafe, too underpowered, or simply too strange for their time. Their value is not only in what they achieved, but in what they made possible for later generations.
Other Forgotten Locomotion Concepts Worth Remembering
Capacitor Motors
Capacitor-style electrostatic motors use changing electric fields between plates or surfaces to produce motion. They are closely related to the idea that charged plates attract each other. In large machines, practical design is difficult; in small devices, the concept can be extremely useful.
Electret Motors
An electret is somewhat like the electrostatic cousin of a permanent magnet. It holds a long-lasting electric polarization. Electret-based motor ideas have appeared in experimental designs because they can provide persistent electric fields without constant external charging.
Electrostatic Induction Machines
Some motors use induced charge rather than direct contact charging. A nearby charged object can rearrange charges within another object, allowing attraction and repulsion to occur without simple spark-to-surface transfer. Franklin understood electrostatic induction in a practical way, even if the later mathematical language had not yet arrived.
Atmospheric Electricity Experiments
Inventors have long wondered whether natural electric fields in the atmosphere could power small motors. The idea is romantic: machines sipping energy from the sky like mechanical hummingbirds. In practice, useful power is difficult to collect reliably, but the experiments remain part of the long history of electrical ambition.
Why This History Still Matters
There is a pattern in technology: we often celebrate the winners and forget the interesting losers. Steam beat many early engines. Electromagnetism beat electrostatics in most large motor applications. Internal combustion dominated roads for more than a century. But the discarded paths still matter because they preserve alternative ways of thinking.
Franklin’s motor teaches three important lessons. First, a scientific demonstration can be more important than its immediate usefulness. Second, materials and manufacturing can decide the fate of an invention as much as the idea itself. Third, old concepts can return when the world changes around them.
That is why forgotten locomotion is not merely a dusty museum shelf. It is a toolbox of unfinished conversations. Every odd little machine asks a question: What would happen if we tried this again with modern tools?
Experiences Related to Ben Franklin’s Weak Motor and Forgotten Locomotion
The best way to appreciate Ben Franklin’s weak motor is not to imagine it as a failed version of a modern motor. That would be like judging a candle because it is not a laser. Instead, imagine standing in an eighteenth-century room where electricity is still mysterious. There is no wall outlet, no electric fan, no phone charger, no power strip hiding under a desk like a plastic octopus. There is only glass, metal, friction, stored charge, and a wheel that begins to move as if persuaded by invisible hands.
That experience changes the story. The motor is not weak anymore; it is astonishing. A person watching it in Franklin’s time was seeing proof that electricity could do work. It could move an object. It could cross the border between spectacle and machinery. Even if the motion was modest, the idea was enormous.
For modern readers, the most relatable experience may come from comparing forgotten locomotion with everyday devices. A phone vibration motor, a silent electric fan, a drone rotor, a subway train, and a spacecraft ion thruster all belong to the same broad human desire: turning energy into controlled movement. The methods differ, but the dream is familiar. We want motion that is cleaner, quieter, smaller, stronger, cheaper, and more precise. Engineers have been chasing that wish for centuries, sometimes with magnets, sometimes with steam, sometimes with sparks, and occasionally with ideas that look mildly unhinged until they work.
Museum exhibits can make this history especially vivid. A reproduction of Franklin’s electrostatic motor may look simple compared with a modern electric vehicle motor, but its simplicity is the point. You can see the concept. You can understand the charge, the rotor, the attraction, the repulsion. Modern motors are often sealed inside housings, optimized by software, and described by equations that make casual visitors suddenly remember an urgent text message. Franklin’s wheel is more approachable. It says, “Electricity pushes things,” and then it pushes a thing.
Another useful experience is watching how people react to ion wind or electrostatic demonstrations. The absence of obvious moving parts feels almost magical. We are trained to expect motion from spinning blades, pistons, wheels, belts, or explosions. When air moves because charged particles are being accelerated, the effect seems too quiet to trust. That is the charm of forgotten locomotion: it reminds us that motion does not always announce itself with noise.
For educators, writers, and technology fans, Franklin’s weak motor offers a perfect storytelling bridge. It connects colonial science with modern electric propulsion. It links a Leyden jar to MEMS devices, a spinning wheel to spacecraft thrusters, and a dinner-table turkey joke to serious questions about sustainable motors. That is a rare historical machine: small enough to understand, strange enough to remember, and important enough to deserve a second look.
The personal takeaway is simple. Do not dismiss an invention because its first version looks weak. Many technologies begin as awkward demonstrations. The first attempt rarely looks like the final revolution. Sometimes progress begins with a spark, a wobble, and a wheel turning just fast enough to make someone grin.
Conclusion: The Spark That Kept Moving
Ben Franklin’s weak motor was not a technological dead end. It was an early signpost on a road that split into many routes: electromagnetic motors, electrostatic machines, ion thrusters, MEMS actuators, and silent solid-state propulsion. Some routes became highways. Others became footpaths through the woods. A few are being rediscovered now because modern engineering has finally caught up with old imagination.
Franklin’s electric wheel deserves attention not because it was powerful, but because it was bold. It turned invisible charge into visible motion. It showed that electricity was not only a spark to be admired or feared; it was a force that could be shaped, directed, and eventually put to work.
Note: This article is an original, web-ready synthesis based on established historical and technical information from reputable museum, engineering, science, and academic sources. It is written for educational publishing and does not provide DIY high-voltage construction instructions.