A centre of excellence for aerospace systems, engineering consultancy and space systems development, specialising in entry, descent and landing systems for space vehicles.
Knowledge and Publications
Vorticity’s team members have written articles which have appeared in many leading aerospace journals, publications, television documentaries and radio programmes.
We are pleased to share the abstracts and links to the complete publications wherever we have explicit permission. A full list of publications is below. To obtain copies of publications, please get in touch with us at webcontact@vorticity-systems.com, and we will be happy to assist you.
The AIAA
The American Institute of Aeronautics and Astronautics is a professional society for the field of aerospace engineering. The AIAA is the U.S. representative of the International Astronautical Federation and the International Council of the Aeronautical Sciences.
Dr Steve Lingard, our founder, is an Associate Fellow of the AIAA and a tutor on the Parachute Short Course. John Underwood also serves as a tutor on the same course.
Dr Steve Lingard and John Underwood provided the content for Chapter 18 -Entry, Descent and Landing Systems.
Conferences
International Planetary Probe Workshop
The IPPW brings together scientists, engineers, technologists, mission designers, space agency representatives and students from around the world for a collaboration focused on exploring solar system destinations through in-situ missions.
Vorticity has been a member of the Community since the IPPW’s inception in 2002.
On the anniversary of the launch of the Huygens-Cassini mission, Vorticity was invited by the Discovery Channel to provide video commentary and artefacts related to the mission.
John Underwood, Vorticity’s principal engineer, demonstrated the flight capability of the 8-metre Huygens parachute.
Papers
2023
“European Flexible TPS Development Conclusions and Roadmap”, T.J. Hancock, J.C. Underwood, J.S. Lingard, A. Flinton, T. Schleutker, E. Kaschnitz & H. Ritter, 20th International Planetary Probe Workshop, Marseille, France, August 2023
“Conceptual Study of a Mars Aerocapture Demonstrator Using Single-Event Drag Modulation”, S.J. Overend, J. Lynch, T.J. Hancock, J.C. Underwood, J.S. Lingard, P. Carneiro, P. Loureiro, A. Flinton & A.J. Ball, 20th International Planetary Probe Workshop, Marseille, France, August 2023
2022
“ExoMars RSP High Altitude Drop Tests from Stratospheric Balloons”, A. Hugon, J. Underwood, J.S. Lingard & L. Ferracina, 25th ESA Symposium on European Rocket & Balloon Programmes and Related Research, Biarritz, France, May 2022
“The ExoMars 2022 Parachute System”, J.C. Underwood, J.S. Lingard, T.J. Hancock & L. Ferracina, 2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Heilbronn, Germany, June 2022
“Developing a Flexible Thermal Protection System for Mars Entry: Systems Engineering, Mechanical Design and Manufacturing Processes”, T.J. Hancock, J.C. Underwood, J.S. Lingard, A. Flinton, J. Merrifield, E. Johnstone, E. Kaschnitz, T. Schleutker & H. Ritter, 2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Heilbronn, Germany, June 2022
“Developing a Flexible Thermal Protection System for Mars Entry: Thermal Design and Testing”, A. Flinton, J. Merrifield, E. Johnstone, T.J. Hancock, J.C. Underwood, J.S. Lingard, E. Kaschnitz, T. Schleutker & H. Ritter, 2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Heilbronn, Germany, June 2022
“European Advanced Parachute Reefing: Developing a Space-Qualified Programmable Reefing Cutter”, T.J. Hancock, J.C. Underwood, J.S. Lingard, R. Matthijssen, L. Ferracina , 2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Heilbronn, Germany, June 2022
“Design and Qualification of the ExoMars 2022 Parachute System”, AIAA 2022-2743, J.C. Underwood, A. Saunders, J.S. Lingard & L. Ferracina, 26th Aerodynamic Decelerator Systems Technology Conference, Toulouse, France, May 2022
“Subsonic Wind Tunnel Investigation into the Effects of Parachute Canopy Material on Inflation Time”, AIAA 2022-2739, T.J. Hancock & J.S. Lingard, 26th Aerodynamic Decelerator Systems Technology Conference, Toulouse, France, May 2022
“Thermal, Mechanical and Manufacturing Development of a Mars-Entry Flexible TPS”, T.J. Hancock, J.C. Underwood, J.S. Lingard, H. Ritter, A. Flinton, J. Merrifield, E. Johnstone, T. Schleutker & E. Kaschnitz, 19th International Planetary Probe Workshop, Santa Clara, USA, September 2022
“The ExoMars Parachute System”, J.C. Underwood, J.S. Lingard, T.J. Hancock & L. Ferracina, 19th International Planetary Probe Workshop, Santa Clara, USA, September 2022
2021
“Development of a Flexible TPS for Deployable & Inflatable Heatshields and Hypersonic Decelerators”, T.J. Hancock, J.C. Underwood, J.S. Lingard, H. Ritter, J. Merrifield, E. Johnstone, B. Esser & E. Kaschnitz, 18th International Planetary Probe Workshop, Virtual, August 2021
2019
“Measurement Of Dynamic Stability Of Earth Return Capsules In Low Supersonic And Transonic Conditions Using Balloon Tests”, S.J. Overend, J.S. Lingard, A. Saunders, J.C. Underwood, L. Ferracina, J. Merrifield & E. Johnstone, International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Monopoli, Italy, October 2019
“Investigating the Response of a Flexible TPS to a High Enthalpy Environment”, E. Johnstone, B. Esser, Burkard & A. Gülhan, J.C. Underwood & L. Ferracina, International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Monopoli, Italy, October 2019
“European Studies To Advance Development of Deployable and Inflatable Aerodynamic Decelerators”, S.J. Overend, J.S. Lingard, A. Saunders, J.C. Underwood, Heiko Ritter, J. Merrifield & E. Johnstone, International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Monopoli, Italy, October 2019
“CFD/FSI Simulation Of Parachute Inflation”, S.B. Rogers, S.J. Overend, J.S. Lingard, J.C. Underwood & L. Ferracina, International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering, Monopoli, Italy, October 2019
“ExoMars 2020 Entry, Descent and Landing System”, J.S. Lingard, J.C. Underwood & S. Langlois, 16th International Planetary Probe Workshop, Oxford, UK, July 2019
2017
“Supersonic Parachute Testing Using a MAXUS Sounding Rocket Piggy Back Payload”, AIAA 2017-3724, J.S. Lingard, A. Saunders, J.C. Underwood, S.B. Rogers, L. Ferracina, J. Merrifield & J. Longo, 24th Aerodynamic Decelerator Systems Technology Conference, Denver, CO, June 2017
“An Investigation into the Performance of Parachutes in Low Density Atmospheres”, AIAA 2017-3390, J.C. Underwood, A. Saunders, S.B. Rogers, J.S. Lingard, L. Marraffa & L. Ferracina, 24th Aerodynamic Decelerator Systems Technology Conference, Denver, CO, June 2017
“Fluid Structure Interation Rebuilding of Parachute Tests”, J.S. Lingard, A. Saunders, J. C. Underwood, S. B. Rogers, L. Marraffa & L. Ferracina, 14th International Planetary Probe Workshop, The Hague, Netherlands, June 2017
2015
“Subsonic Wind Tunnel Testing of Various Parachute Types “, AIAA 2015-2112, J.C. Underwood, A. Saunders, S.B. Rogers, J.S. Lingard, L. Marraffa, … S.A.M. McTavish , 23rd Aerodynamic Decelerator Systems Technology Conference, Daytona Beach, FL, March 2015
“Supersonic Tests of the Double Gap Disk Gap Band Parachute and Fluid Structure Interaction Simulation”, AIAA 2015-2109, J.S. Lingard, J.C. Underwood, M.G. Darley, A. Saunders, L. Marraffa & L. Ferracina, 23rd Aerodynamic Decelerator Systems Technology Conference, Daytona Beach, FL, March 2015
“European studies to advance development of inflatable and deployable decelerators”, S. Overend, J.C. Underwood, J.S. Lingard, 12th International Planetary Probe Workshop, Cologne, Germany, June 2015
2013
“ExoMars EDM Parachute System: Update on Design and Verification”, AIAA 2013-1278, A. Saunders, J.C. Underwood, J.S. Lingard & S. Langlois, 22nd Aerodynamic Decelerator Systems Technology Conference, Daytona Beach, FL, May 2013
“Supersonic Parachute Aerodynamic Testing and Fluid Structure Interaction Simulation”, AIAA 2013-1365, J.S. Lingard , J.C. Underwood, M.G. Darley, L. Marraffa & L. Ferracina, 22nd Aerodynamic Decelerator Systems Technology Conference, Daytona Beach, FL, May 2013
“Design of an Airbag Landing System for Small Mars Landers”, AIAA 2013-1279, M.G. Darley, S.J. Overend & T. Cardone, 22nd Aerodynamic Decelerator Systems Technology Conference, Daytona Beach, FL, May 2013
2012
“Sub-scale, high-altitude testing of parachutes; a low-cost methodology for the characterisation of parachutes for planetary entry”, J.C. Underwood & J.S. Lingard, 9th International Planetary Probe Workshop, Toulouse, France, June 2012
2011
“Testing of a two-stage reefed 27m Polyconical Parachute for the Cirrus Jet”, AIAA 2011-2578, J. Yeakle, J.C. Underwood & S.J. Overend, 21st Aerodynamic Decelerator Systems Technology Conference, Dublin, Ireland, May 2011
“High-altitude testing of parachutes; a low-cost methodology for parachute evaluation using consumer electronics”, AIAA 2011-2520, I.C. Waugh, E.A. Moore, D.G. Strange, J. Cormack, F. Noble & J.C. Underwood, 21st Aerodynamic Decelerator Systems Technology Conference, Dublin, Ireland, May 2011
2009
“ExoMars Parachute System”, AIAA 2009-2975, J.S. Lingard, J.C. Underwood, S.D. Glynn, D. Franqueville, P. Arfi, O. Bayle, … S. Portigliotti, 20th Aerodynamic Decelerator Systems Technology Conference, Seattle, WA, May 2009
“Computer Simulation of a Whole-Aircraft Parachute Recovery System”, AIAA 2009-2918, J. Yeakle, S. Gundmundsson, J.S. Lingard & J.C. Underwood, 20th Aerodynamic Decelerator Systems Technology Conference, Seattle, WA, May 2009
2007
“Huygens DCSS post flight reconstruction”, AIAA 2007-2579, J.S. Lingard & J.C. Underwood, 19th Aerodynamic Decelerator Systems Technology Conference, Williamsburg, VA, May 2007
“Simulation of Mars Supersonic Parachute Performance and Dynamics”, AIAA 2007-2507, J.S. Lingard, M.G. Darley & J.C. Underwood, 19th Aerodynamic Decelerator Systems Technology Conference, Williamsburg, VA, May 2007
“Inflatable Aerocapture Decelerators for Mars Orbiters”, AIAA 2007-2543, G.J. Brown, J.S. Lingard, M.G. Darley & J.C. Underwood, 19th Aerodynamic Decelerator Systems Technology Conference, Williamsburg, VA, May 2007
2006
“Aerodynamic Decelerators for Planetary Exploration: Past, Present, and Future”, AIAA 2006-6792, J.R. Cruz & J.S. Lingard, AIAA Guidance, Navigation and Control Conference and Exhibit, Keystone, CO, August 2006
2005
“Huygens DCSS performance reconstruction”, J.C. Underwood, 3rd International Planetary Probe Workshop, Anavyssos, Attiki, Greece, June 2005
2004
“Revalidation of the Huygens Descent Control Sub-System “, J.C. Underwood, J.S. Lingard & M.G. Darley, 2nd International Planetary Probe Workshop, NASA Ames, Moffet Field, CA, August 2004
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