{"id":12268,"date":"2019-10-16T21:31:10","date_gmt":"2019-10-17T04:31:10","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=12268"},"modified":"2019-10-16T21:31:10","modified_gmt":"2019-10-17T04:31:10","slug":"the-villiger-traveler-updated","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/the-villiger-traveler-updated\/","title":{"rendered":"The Villiger Traveler Updated"},"content":{"rendered":"

Urs Villiger flew his Traveler TR230 four-seat touring craft about 10 years ago.\u00a0 He started revising the Cessna-like vehicle two years ago, turning it into a more aerodynamic and economical machine.\u00a0 His changes turned the Traveler into a hybrid aircraft and relocated the propeller to the vertical stabilizer.<\/p>\n

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Travler on static display at Smart Flyer Challenge in Grenchen., Switzerland<\/p><\/div>\n

Reflecting professor Dipl.-Ing. Rudolf Voit-Nitschmann\u2019s configurations he developed for Icare II and \u00a0e-Genius, the low-drag placement of the drive motor near the top of the vertical fin confines the added drag caused by the propeller\u2019s acceleration of air over the aircraft\u2019s skin to the top-most part of the fin and rudder.\u00a0 Compare the area exposed to propeller blast to that of a conventional nose-mounted engine \u201ctractor\u201d type aircraft.<\/p>\n

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Icare II (foreground) and e-Genius were both products of Rudolf Voit-Nitschman’s mentoring and students at Stuttgart University.\u00a0 e-Genius was second-place winner in 2011 Green Flight Challenge<\/p><\/div>\n

On static display at this September\u2019s Smart Flyer Challenge in Grenchen, Switzerland, the newly revised Traveler showed a streamlined nose fairing that holds a gas turbine (reported from a Panavia Tornado fighter\u2019s auxiliary power unit (APU) attached to the UQM motor\/generator.<\/p>\n

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Traveler has turbine reportedly from Panavia Tornado jet fighter coupled with UGM motor\/generator<\/p><\/div>\n

That unit charges the craft\u2019s batteries with up to 100 kilowatts of continuous power output.<\/p>\n

Batteries in turn energize the tail-mounted motor that swings a five-blade MT propeller.\u00a0 The motor is being developed to produce 200 kilowatts (268 horsepower) and weigh only 30 kilograms (66 pounds).<\/p>\n

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Traveler promises to be quiet and efficient with the M\u00fchlbauer five-blade propeller . The concept was first used in the German e-Genius.\u00a0 Photo: Peter Brotschi<\/p><\/div>\n

All this and more is taking place at Evolaris, a Swiss company<\/a> that does aircraft structures, batteries, power electronics and batteries and even software \u2013 just about everything needed for creating electric airplanes.<\/p>\n

Two water-cooled power inverters, housed in carbon fiber and aluminum, control the motor.\u00a0\u00a0The redundant units enhance reliability.<\/p>\n

Evolaris-devised intelligent software regulates the whole system, communicating between individual components and displaying relevant information for the pilot.\u00a0 In the meantime, Evolaris engineers are making sure everything works a<\/p>\n

https:\/\/www.facebook.com\/TravellerHybrid\/videos\/437759099994666\/<\/p>\n

The drop test proves the limits of Traveler\u2019s landing gear and its ability to withstand a hard landing.\u00a0<\/strong><\/p>\n

https:\/\/www.facebook.com\/TravellerHybrid\/videos\/2256541561226331\/<\/p>\n

Flap operation is smooth, providing additional wing area for slow landings or enhanced takeoffs.<\/p>\n

Specifications show the 12 meter wingspan machine will weight 1,450 kilograms (3,190 pounds) fully loaded, including 400 kilograms (880 pounds) of batteries.\u00a0 The motor will produce 160 kilowatts (214 hp.) with a peak output of 220 kW (295 hp.).\u00a0 Traveler will cruise at 220 kilometers per hour (136.4 mph) for up to an hour and 30 minutes.<\/p>\n

The latter figure is with batteries only.\u00a0 The range extender should extend that, living up to its name.<\/p>\n