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ROCKET SCIENCE
Safe splashdown for Intermediate eXperimental Vehicle
by Staff Writers
Paris (ESA) Jun 25, 2013


On the 19 June 2013 the IXV Descent and Landing System Test was successfully performed off the east coast of Sardinia, Italy, at the Poligono Interforze Salto di Quirra. The IXV full-scale prototype was brought up to an altitude of 3000 meters by a helicopter of the Italian Defense, and dropped in free-fall to gain the speed required for the proper deployment of the parachute main stage, which then slows down the vehicle in its descent phase for a splash-down in the sea at a speed below 7 m/s in compliance with the vehicle main design loads. Copyright ESA/CIRA.

ESA's experimental reentry vehicle passed its milestone descent and landing test on Wednesday at the Poligono Interforze Salto di Quirra off the east coast of Sardinia in Italy.

The full-scale Intermediate eXperimental Vehicle (IXV) prototype was released from an altitude of 3000 m by a helicopter, falling to gain speed to mimic a space mission before parachute deployment. The parachute slowed IXV for a safe splashdown in the sea at a speed below 7 m/s.

This last step in a series of tests shows that IXV can be recovered safely after its mission into space.

The IXV project is developing and flight-testing the technologies and systems for Europe's future autonomous atmospheric reentry vehicles.

It will be launched by ESA next year on Vega, Europe's new small launcher, into a suborbital path. It will reenter the atmosphere as if from a low-orbit mission, testing new European reentry technologies during its hypersonic and supersonic flight phases.

Previous campaigns included several water impact tests at CNR-INSEAN, a marine-engineering research institute in Rome, Italy. An instrumented subscale prototype was released at various angles and speeds to assess the best configuration for minimum impact loads.

At the Yuma Proving Ground in Arizona, USA, the multistage supersonic parachute was qualified up to the opening of the main subsonic stage.

Building on these, Wednesday's test started with the redeployment of the main subsonic parachute followed by: cutting the two ablative thermal protection covers of the parachute bridles, firing the 16 non-explosive actuators to release the four panels covering the floatation balloons, jettisoning the panels, detecting the water impact, deploying the beacons, and receiving the signal from the Cospas-Sarsat satellite network pinpointing the prototype bobbing in the sea.

An anomaly in inflating the balloons will be investigated. The vehicle was recovered from the sea and taken to land for detailed inspections and analysis.

This test highlights the importance of early inflight verification to secure a robust space vehicle design, confirming the technical direction and possibly suggesting further improvements.

An anomaly in inflating the balloons will be investigated. The vehicle was recovered from the sea and taken to land for detailed inspections and analysis.

This test highlights the importance of early inflight verification to secure a robust space vehicle design, confirming the technical direction and possibly suggesting further improvements.

"Our special thanks go to the Italian Defense and the Italian Aerospace Research Centre (CIRA) for the commitment and the excellence exhibited in performing complex air-sea-ground operations enabling the successful challenging descent and landing system test," noted Giorgio Tumino, IXV Programme Manager.

On IXV's flight next year, the suborbital vehicle will separate from its Vega launcher at an altitude of 320 km. IXV will coast to 430 km and then begin its reentry phase, recording an impressive amount of experiment data from a large number of conventional and advanced sensors.

The entry speed of around 7.5 km/s at an altitude of 120 km will create the same conditions as those for a vehicle returning from low orbit. The mission, lasting more than 2 hours, will end with splashdown in the Pacific Ocean to await recovery and analysis.

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