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   NLR - Information

About NLR
Like the Netherlands itself, NLR is one of the smaller European RDT&E organisations. Approximately 700 personnel are located at two sites in the Netherlands, in Amsterdam and in Vollenhove on land reclaimed from the sea.

NLR operates in the following market segments:
- Aeronautics industry (both civil and defence)
- Air transport
- Defence government
- Space

An organisation diagram, with departments and disciplines can be found here:
- Organisation Management Team NL
- Organisation Management Team UK

Space Vehicles and Launchers at NLR
NLR's involvement in space vehicles dates way back to the beginning of the European space programme (ELDO) which has been followed by Ariane, Hermes, CTV, X-CRV/X-38, Huygens probe.

NLR Wind Tunnel Engineering
Pressure Instrumentation
NLR Space Vehicles poster

NLR and Ariane Wind Tunnel reseach
In the DNW high speed wind tunnel, the NLR tested a 1/60th scale model of the Ariane 5 Plus ECA launch vehicle with an "optimised" nozzle of the Vulcan 2 engine. The NLR designed, manufactured and instrumented the nozzle. To characterise the buffeting phenomenon, 144 steady and unsteady pressures were measured and integrated into overall forces and moments acting on the nozzle.

Ariane 5 in the wind tunnel
Fluid slosh study improves satellite efficiency
The Dutch satellite Sloshsat FLEVO carried out an eight-day experimental mission in 2005, to gain insight into the complexities of fluid sloshing in space.
Fluid loads aboard spacecraft display erratic sloshing patterns. Precision forecasts of these patterns are especially crucial during docking maneuvers and orbit adjustments. The Dutch Sloshsat FLEVO satellite was launched on February 12, 2005, with an Ariane 5 ECA to gain better insight into and control over fluid motion in space. This is the first time that slosh experiments have been conducted on this scale.

Annual Report 2005
NLR Flyer about Sloshsat Flevo

Design and optimisation of an Ariane 5 LOX line cover
In June 2000 a two-year joint programme by Ducth Space, Centre of Lightweight Structures, and the National Aerospace Laboratory NLR was started to develop, manufacture, and qualify a demonstrator fairing (the upper LOX line cover). The aim is a 50 % reduction of the recurring costs of the LOX line cover by design optimisation and the application of a new manufacturing process.

Resin transfer moulding for space applications
Composites are being used increasingly for structural components for aircraft and space applications. Up to now, the autoclave process is the standard fabrication technique to produce these components. Recent developments show the evolution of new fabrication techniques and of composite materials for these fabrication techniques. One of these new fabrication techniques is Resin Transfer Moulding (RTM).