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Instrumented splashdown testing of a scale model Titan Mare Explorer (TiME) capsule

Published online by Cambridge University Press:  27 January 2016

R. D. Lorenz ,
K. Hibbard ,
M. V. Paul ,
J. Walsh ,
D. W. Olds ,
S. Willits ,
E. B. Bierhaus  and
W. E. Kretsch
K. Hibbard
Affiliation:
Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA
M. V. Paul
Affiliation:
Applied Research Laboratory, Pennsylvania State University, Pennsylvania, USA
J. Walsh
Affiliation:
Applied Research Laboratory, Pennsylvania State University, Pennsylvania, USA
D. W. Olds
Affiliation:
Applied Research Laboratory, Pennsylvania State University, Pennsylvania, USA
S. Willits
Affiliation:
Applied Research Laboratory, Pennsylvania State University, Pennsylvania, USA
E. B. Bierhaus
Affiliation:
Lockheed Martin Space Systems Company, Littleton, Colorado, USA
W. E. Kretsch
Affiliation:
Lockheed Martin Space Systems Company, Littleton, Colorado, USA
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Abstract

Water entry tests are conducted with a scale model capsule to explore the sensitivity of splashdown accelerations and motions to impact conditions, to support estimation of splashdown loads and behaviours of the proposed Titan Mare Explorer (TiME) mission. A 3D printed capsule with off-the-shelf USB accelerometer loggers enabled tests to be performed on a tight schedule. Contact impulse and peak loads are presented for a range of impact speeds and geometries, and predicted loads at full-scale on Titan are derived. The observed variation of peak load with impact speed is broadly consistent with the theoretically-expected square law but is surprisingly also consistent with a linear function (in common with some results from the literature). Test execution procedures and the performance of the data acquisition system are reviewed.

Type
Research Article
Information
The Aeronautical Journal , Volume 119 , Issue 1214 , April 2015 , pp. 409 - 431
Copyright
Copyright © Royal Aeronautical Society 2015

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References

1.Fasanella, E.L.Multiterrain earth landing systems applicable for manned space capsules, American Society of Civil Engineers, J Aerospace Eng, 2009, 22, pp 201–213.CrossRefGoogle Scholar
2.Seddon, C.M. and Moatamedi, M.Review of water entry with application to aerospace structures, Int J of Impact Engineering, 2006, 32, pp 1045–1067.CrossRefGoogle Scholar
3.Lorenz, R.D.Huygens probe impact dynamics, ESA J, 1994, 18, pp 93–117.Google Scholar
4.Seiff, A., Stoker, C.B., Young, R.E., McKay, C.P. and Lorenz, R.D.Determination of the physical properties of a planetary surface by acceleration measurements at impact, Planetary and Space Science, 2005, 53, pp 594–600.CrossRefGoogle Scholar
5.Lorenz, R.D.Splashdown and post-impact dynamics of the Huygens probe: Model studies, 2003, Proc of Int Workshop on Planetary Entry and Descent Trajectory Reconstruction and Science, pp 117–124Lisbon, Portugal, October 2003, ESA SP-544, European Space Agency, Noordwijk, The Netherlands.Google Scholar
6.Lorenz, R.D. and Mitton, J.Titan Unveiled, Revised Paperback Edition, 2010, Princeton University Press.CrossRefGoogle Scholar
7.Stofan, E.R., Lorenz, R.D., Lunine, J.I., Bierhaus, E.B., Clark, B., Mahaffy, P. and Ravine, M.TiME – The Titan Mare Explorer, March 2013, Paper 2434, IEEE Aerospace Conference, Big Sky, MT, USA, doi:10.1109/AERO.2013.6497165.CrossRefGoogle Scholar
8.Stubbs, S.M. Dynamic model investigation of water pressures and accelerations encountered during landings of the Apollo spacecraft, September 1967, NASA Technical Memorandum, TN D-3980, NASA.Google Scholar
9.Lorenz, R.D.Apollo capsule capsize stability during splashdown: Application of a cavity collapse model. J British Interplanetary Society, 2011, 64, pp 289–295.Google Scholar
10.Wierzbicki, T. and Yue, D.K.Impact damage of the Challenger crew compartment, J Spacecraft and Rockets, 1986, 23, pp 646–654.CrossRefGoogle Scholar
11.Hirano, Y. and Miurak, K.Water impact accelerations of axially symmetric bodies, J Spacecraft and Rockets, 1970, 7, pp 762–764.CrossRefGoogle Scholar
12.Wilkinson, J. Study of Apollo water impact Final Report Volume 4 – Comparison with experiments, May 1967, North American Aviation, SID 67-498, Published as NASA CR-92022.Google Scholar