cabin and to defrost the windows How long will it take the air conditioning system to cool down a hot interior How will the windshield wipers per form Will plug connections and electronic equip ment function flawlessly even in conditions of arctic cold and extreme heat In their pursuit of answers the developers could test on roads around the globe for months on end a major logistical feat An additional diffi culty lies in the fact that natural weather phenom ena are hardly controllable and repeatable This PAGE FOLDS OUT RTA Rail Tec Arsenal RTA is specifically designed for climatic tests of rail vehicles However pas senger cars buses or trucks can also be tested in the climatic wind tunnel facility that was built from scratch in 2003 and is equally suitable for aircraft Manufacturers of other products test their technical systems there as well For instance weather conditions and wind loads can be simulated for façade segments for traf fic engineering such as signal and transmission systems railroad switch systems wind protec tion walls or for wind turbines or transformers in energy engineering etc As an accredited test institute RTA is also able to conduct climate spe cific compliance investigations according to in ternational standards The temperature range is precisely why the climatic wind tunnels are so valuable for manufacturers They make it possible to clearly accelerate development cycles General Motors for instance says a climatic wind tunnel is able to reduce road testing by 80 percent Volk swagen emphasizes that the communication chan nels between development teams such as vehicle 100 meters 328 feet long and temperatures down to 45 C 49 F RTA in Vienna is one of the world s largest climatic chambers extends from 45 C 49 F to 60 C 140 F and humidity can be varied between 10 and 98 percent An overhead rain rig and an icing rig a spray rig and mobile snow nozzles sim ulate wetness and ice Since 2013 the facility has been able to even generate cumulus and stratus clouds 260 nozzles vaporize water with compressed air into icy droplets The small wind tunnel enables 120 km h 75 mph of wind speed and has a 33 8 meter 110 foot long test section with a frontal area of up to 28 7 square meters 94 square feet The large wind tunnel is de signed for 300 km h 186 mph its 100 meter 328 foot long test section can even accommo date a train set and the frontal area has a size of up to 32 2 square meters 106 square feet 68 73

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