Europe’s small spaceplane ambitions get splashdown boost

by | Jul 26, 2013 | Seradata News | 0 comments

A European Space Agency bid to develop a small, reusable spaceplane in the 2017-18 timeframe is on track for a summer 2014 launch to test key re-entry technologies following a successful helicopter-drop splashdown trial.

That June 2013 test, off the east coast of Sardinia, of a full-scale prototype of the Intermediate eXperimental Vehicle (IXV) left ESA confident that the vehicle will survive splashdown and recovery following its planned suborbital launch on a Vega rocket from Kourou, French Guiana in summer 2014.

The Vega test launch was originally set for 2013, but contract negotiations between industrial partners forced a delay. However, says programme head Giorgio Tumino, the recovery test success coincided with a “consolidation” of plans, and integration of the live vehicle is underway at Thales Alenia Space in Turin. Pre-launch testing will be carried out by ESA in the Netherlands before shipping to Kourou.

ESA, says Tumino, has high confidence in the thermal protection system to be used on the 2t lifting body IXV. The system, consisting of large panels rather than the small tiles that were so problematic on NASA’s Space Shuttle, has been extensively tested in hypersonic Scirocco wind tunnel near Naples.

But the real excitement comes in IXV’s follow-on programme, PRIDE – Programme for Reusable In-orbit Demonstrator in Europe. The PRIDE vehicle will be fully orbital and capable of runway landing, and designed to orbit small satellites, conduct microgravity or high-altitude research, be deployed for disaster monitoring or to refuel satellites in orbit.

PRIDE is being designed for affordability, stresses Tumino. It is being sized to fit the available Vega rocket, and its small size reduces cost and turnaround time. The concept carries the legacy of the HERMES spaceplane studied by France’s CNES space agency and ESA in the 1980s and the NASA-ESA-DLR X-38 crew return vehicle concept, which was abandoned in 2002.

Meanwhile, says Tumino, IXV is “fundamental for any European ambition to return from orbit”. Whether that means cargo or, ultimately astronauts, the key lies in lessons being learned in thermal protection and aerodynamics from IXV, he adds.

ESA's PRIDE small spaceplane will be capable of refueling satellites

ESA’s PRIDE small spaceplane will be capable of refueling satellites

Another thread in ESA re-entry technology programme remains on hold pending price negotiations with Orbital Sciences for a launch. The Expert (European eXPerimental Re-entry Testbed) has been waiting, ready to fly, in a clean room at Thales Alenia Space in Turin since its original Spring 2012 suborbital ride, on a Volna rocket, was withdrawn  when Russia withdrew that submarine-borne vehicle from civilian launch duties.

Project leader Jose Gavira says a launch by Dniepr, the Ukranian vehicle derived from the SS-18 ballistic missile, may be possible, but it is not certain that the rocket’s capability is sufficient. Thus, he says, Orbital’s air-launched Pegasus is first choice, but unlike Volna it is expensive. If price negotiations can be wound up by November-December, there is some chance for a budget go-ahead and launch in 2014.

Expert is a technology demonstrator intended to validate some basic aerodynamic science and on-ground analysis tools. Lessons taken from its flight test should inform ESA work on re-entry technology, but no specific programme is being held up by delays to Expert, says Gavira.

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