The Concept

The Antipode is a supersonic business aircraft concept capable of reaching 16,000 mph. It uses counter flowing jets of air on its leading edges to reduce heat and the sonic shockwave. During time-sensitive crises, it would transport highly ranked officials across the globe in a matter of hours.

The background

I recently created a hypersonic aircraft concept named the Skreemr. One foreseeable problem was the sonic boom noise it would generate over land and the massive amount of heat that would build up on its nose and wings.

Shortly after the Skreemr appeared in news articles, I was contacted by Joseph Hazeltine of Wyle Inc. He proposed using a novel aerodynamic phenomenon called long penetration mode (LPM) to address these two problems.

How it works

Unlike the Skreemr, the Antipode would be able to take off directly from any airfield by using reusable rocket boosters. These rockets would attach to the wings of the Antipode and provide enough thrust to lift off, climb to 40,000 feet, and reach Mach 5.

The acceleration boosters would then separate from the Antipode and fly back to the airbase like Blue Origin’s boosters. At Mach 5, the aircraft’s onboard computer would ignite its supersonic combustion ramjet engine and accelerate up to Mach 24 at 40,000 feet.

The Antipod would channel some of the air, flowing at supersonic speed, through a nozzle located on the nose of the aircraft. This counterflowing jet of air would induce a phenomenon called ‘LPM’ or long penetration mode (see video).

Using LPM would lead to a drop in surface temperature due to aero-heating and a reduction of the shockwave and noise related to breaking the sound barrier. The leading edge of the wings of the aircraft could also be fitted with linear nozzles so that air could flow out of them too. In this way, all leading edge surfaces could also be cooled by LPM.

The plane’s wings would have enough lift to glide and land on a 6,000 foot runway. Emergency compact rocket boosters similar to the EZ-Rocket from X-COR aerospace could be ignited in case the aircraft needed to make a second landing attempt and could also be used to slow down the aircraft.

What it’s used for

The Antipode could be used as business or military aircraft to transport two highly ranked officials across the globe (up to 20,000 km) in less than an hour. Additional research on LPM should be conducted to validate the full added value and technology potential. If you are interested in funding this type of research in partnership with Wyle, please contact Joseph Hazeltine.


The Antipode concept was imagined in November 2015 by Charles Bombardier and the images were created by Abhishek Roy, the founder of Lunatic Koncepts, a design lab based in India. Abhishek’s team also created the renderings for the Subrocket car and the Korbiyor autonomous electric hearse concept.