TY  - CHAP
A1  - Seboldt, Wolfgang
A1  - Dachwald, Bernd
T1  - Solar sails for near-term advanced scientific deep space missions
T2  - Proceedings of the 8th International Workshop on Combustion and Propulsion
N2  - Solar sails are propelled in space by reflecting solar photons off large mirroring surfaces, thereby transforming the momentum of the photons into a propulsive force. This innovative concept for low-thrust space propulsion works without any propellant and thus provides a wide range of opportunities for highenergy low-cost missions. Offering an efficient way of propulsion, solar sailcraft could close a gap in transportation options for highly demanding exploration missions within our solar system and even beyond. On December 17th, 1999, a significant step was made towards the realization of this technology: a lightweight solar sail structure with an area of 20 m × 20 m was successfully deployed on ground in a large facility at the German Aerospace Center (DLR) at Cologne. The deployment from a package of 60 cm × 60 cm × 65 cm with a total mass of less than 35 kg was achieved using four extremely light-weight carbon fiber reinforced plastics (CFRP) booms with a specific mass of 100 g/m. The paper briefly reviews the basic principles of solar sails as well as the technical concept and its realization in the ground demonstration experiment, performed in close cooperation between DLR and ESA. Next possible steps are outlined. They could comprise the in-orbit demonstration of the sail deployment on the upper stage of a low-cost rocket and the verification of the propulsion concept by an autonomous and free flying solar sail in the frame of a scientific mission. It is expected that the present design could be extended to sail sizes of about (40 m)2  up to even (70 m)2 without significant mass penalty. With these areas, the maximum achievable thrust at 1 AU would range between 10 and 40 mN – comparable to some electric thrusters. Such prototype sails with a mass between 50 and 150 kg plus a micro-spacecraft of 50 to 250 kg would have a maximum acceleration in the order of 0.1 mm/s2 at 1 AU, corresponding to a maximum ∆V-capability of about 3 km/s per year. Two near/medium-term mission examples to a near-Earth asteroid (NEA) will be discussed: a rendezvous mission
and a sample return mission.
KW  - solar sail
KW  - low-thrust
KW  - near-Earth asteroid
KW  - sample return
KW  - solar system
Y1  - 2003
N1  - Proceedings of the 8th International Workshop on Combustion and Propulsion. Pozzuoli, Italy, 16 - 21 June 2002.
ER  - 
TY  - BOOK
A1  - Schmitz, Günter
T1  - Mechatronik im Automobil II : aktuelle Trends in der Systementwicklung für Automobile / Günter Schmitz (Hrsg.)
Y1  - 2003
SN  - 3-8169-2139-6
PB  - Expert-Verl
CY  - Renningen
ER  - 
TY  - JOUR
A1  - Röth, Thilo
A1  - Schreiber, Harold
T1  - CAKE (Computer Aided Kinematic Engineering) im Karrosseriebau und in der passiven Fahrzeugsicherheit / Schreiber , Harold ; Röth, Thilo
JF  - Mobiles. 2002/2003 (2003), H. 33
Y1  - 2003
N1  - in der Bibliothek Eupener Str. vorhanden
SP  - 65
EP  - 67
ER  - 
TY  - CHAP
A1  - Mathiak, Gerhard
A1  - Plescher, Engelbert
A1  - Willnecker, Rainer
T1  - Parabolic flight experiments about vibrational effects on diffusion experiments
T2  - 54th International Astronautical Congress of the International Astronautical Federation (IAF) :  Bremen, 29 Sept. 2003 through 3 Oct. 2003 ; vol. 1
Y1  - 2003
SP  - 4389
EP  - 4396
ER  - 
TY  - JOUR
A1  - Havermann, Marc
A1  - Seiler, F.
A1  - George, A.
A1  - Leopold, F.
T1  - Planar Velocity Visualization in High-Speed Wedge Flow using Doppler Picture Velocimetry (DPV) compared with Particle Image Velocimetry (PIV) / Seiler, F. ; Havermann, M. ; George, A. ; Leopold, F. ; Srulijes, J.
JF  - Journal of Visualization. 6 (2003), H. 3
Y1  - 2003
SN  - 1343-8875
SP  - 253
EP  - 262
PB  - -
ER  - 
TY  - BOOK
A1  - Havermann, Marc
T1  - PIV-Messungen im hohen Überschall am ISL-Stoßrohr-Windkanal : 11. Fachtagung Lasermethoden in der Strömungsmesstechnik, PTB Braunschweig, 9. - 11. September 2003 / Institut Franco-Allemand de Recherches de Saint-Louis. Havermann, M. ...
Y1  - 2003
N1  - Publication / Institut Franco-Allemand de Recherches de Saint-Louis ; 655
PB  - ISL
CY  - Saint-Louis
ER  - 
TY  - CHAP
A1  - Gitter, R.
A1  - Hornhardt, Ch.
A1  - Koewius, A.
A1  - [u.a.], 
A1  - Wahle, Michael
T1  - Konstruieren mit Aluminium [Kapitel 4]
T2  - Aluminium-Taschenbuch / Hrsg.: Aluminium-Zentrale Düsseldorf. - Bd. 3: Weiterverarbeitung und Anwendung
Y1  - 2003
SN  - 3-87017-275-4
SP  - 355
EP  - 599
PB  - Aluminium-Verlag
CY  - Düsseldorf
ET  - 16. Auflage
ER  - 
TY  - JOUR
A1  - Gerhardt, Hans Joachim
A1  - Schwarz, N.
T1  - Entrauchung über Seitenwände
JF  - vfdb-Zeitschrift. 52 (2003), H. 1
Y1  - 2003
SN  - 0042-1804
SP  - 25
EP  - 35
ER  - 
TY  - JOUR
A1  - Gerhardt, Hans Joachim
A1  - Konrath, Bernd
T1  - Rauchableitung in unterirdischen Verkehrsanlagen. Möglichkeiten und Hinweise zur Ausführung.
JF  - vfdb-Zeitschrift. 52 (2003), H. 2
Y1  - 2003
SN  - 0042-1804
SP  - 59
EP  - 65
ER  - 
TY  - JOUR
A1  - Gerhardt, Hans Joachim
T1  - Rauchableitung und deren Effektivität in der 4. Elbtunnelröhre
JF  - tunnel - Internationale Fachzeitschrift für unterirdisches Bauen (2003)
Y1  - 2003
SN  - 0722-6241
SP  - 19
EP  - 28
ER  -