---
title: The Lifter (Ionocraft)
---

The lifter is the most accessible demonstration of the <PageRef space="electrogravitics" slug="biefeld-brown-effect" />: a feather-light frame of balsa wood, thin wire, and aluminium foil that, wired to a high-voltage supply, **rises off the bench and hovers.** Also called an ionocraft or asymmetric-capacitor thruster, it is the device that has kept <PageRef space="frontier-scientists" slug="thomas-townsend-brown" />'s effect alive in garages, classrooms, and laboratories long after his death — and it is the thread that connects his 1920s discovery to a working aircraft flown in this century.

## The replication wave

Lifters became a worldwide hobbyist phenomenon around the turn of the millennium. The French engineer **Jean-Louis Naudin** built and documented working lifters in 2001, replicated a NASA test design, and published open build instructions, explicitly describing the lifter as *"a modern version of the Townsend Brown Electrokinetic Apparatus."* Hundreds of independent replications followed. The appeal is direct: with a few dollars of materials and enough voltage, anyone can watch the effect lift its own weight against gravity.

## What the laboratories found

Because lifters are cheap and unambiguous, they drew formal study — and the results frame the honest state of the question. The **U.S. Army Research Laboratory** (2003) measured the thrust and found that ordinary ion wind was about three orders of magnitude too weak to account for it, concluding that the underlying physics *"is not understood."* A **NASA**-commissioned study (2004) reached the opposite conclusion — that electrostatics and momentum transfer through air collisions *"fully explain"* the lift, with no force detected in vacuum. The two reports, dated and named, are the fair bracket on the lifter: clearly an electrical effect that moves air, with the deeper question of whether anything more is involved still contested between them.

## From bench toy to flight

Whatever its ultimate explanation, the asymmetric-capacitor thruster matured into real aviation. In 2018 a team at **MIT led by Steven Barrett flew the first fixed-wing aircraft propelled with no moving parts** — a five-metre craft lifted by **electroaerodynamic (ion-wind) thrust**, drawing the same kind of force a lifter does, reported in *Nature*. The MIT group presents its plane firmly as ion-wind propulsion — the conventional mechanism, not a vindication of electrogravitics — and that distinction matters. But it is also the legitimate engineering descendant of the very effect Brown patented: the asymmetric capacitor, charged to high voltage, made to do useful work in the air. Brown's grandest claims remain unproven; his quiet one — that a charged capacitor can push without propellant — now flies.

## Sources & talks

The physics matured into flight — *Nature*'s own film of the MIT ion-wind aircraft:

<VideoEmbed provider="youtube" id="boB6qu5dcCw" title="Ion drive: The first flight (Nature Video — MIT ion-wind aircraft, 2018)" />

A build-and-demonstrate documentary on the high-voltage lifter:

<VideoEmbed provider="youtube" id="XKi9OOS-e94" title="High Voltage Lifter / Ion Craft — a 'how to' documentary" />

**Primary sources:** the [ARL 2003 report](https://arxiv.org/abs/physics/0211001) and the [NASA 2004 report](https://ntrs.nasa.gov/api/citations/20040171929/downloads/20040171929.pdf) on asymmetric-capacitor thrust · MIT's ion-wind flight in *Nature* (Xu et al., 2018) · Jean-Louis Naudin's [lifter archive](http://jnaudin.free.fr/lifters/main.htm).