OCT 2018


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Page 14 of 83 13 AirVenture 2018 the VTOL (within 2 minutes) that will carry them by air to another vertiport. Another ground vehicle will then accept the pod and transport it the last mile to the final destination. TF-2 will be piloted, and initially have a hybrid-electric drive; all-electric propulsion will eventually be incorporated as the technology matures, says Terrafugia. With a payload of 900-1,100 lb, maximum speed is projected at 120-130 knots and the anticipated range is 170-215 nautical miles. Samson Motors' (Redmond, OR, US) carbon fiber composite Switchblade, introduced last year, was on display again. Company CEO Sam Bousfield announced that, at the show, reservations surpassed the 700 level, so inter- est is high. Bousfield told the crowd, as reported by David Tulis of Aircraft Owners and Pilots Assn. (AOPA), that the Switchblade will fly later this year. And there were more "personal aviation" vehicles on display. One of these concepts, in its Oshkosh debut, was BlackFly (version 2), a VTOL battery-electric personal air vehicle (PAV) by Opener (Palo Alto, CA, US). The odd- looking craft with two wings has already, says the company, logged 12,000 miles in more than 1,400 test flights. A streamlined single-seat cabin with a rounded bottom and glass canopy on top is attached to a forward and a rear wing, with the front wing slightly shorter than the rear. Overall dimensions are 4.2m wide, 4.1m long and 1.5m high. Each wing supports four horizontal propellers, driven by electric motors powered by batteries. Four pairs of elevons (control surfaces that combine the functions of elevators and ailerons) provide flight control. Classified as an ultralight aircraft, which means that the operator does not have to obtain a pilot's license, the BlackFly weighs only 313 lb empty, with a maximum payload of 250 lb. The vehicle has a 25-mile range and a 62-mph cruise speed (in the US; European rules allow faster flight). The BlackFly can be recharged via solar panels, which come with the craft's small transport trailer; Opener says an 80% charge is possible in 25 minutes. The vehicle can be disassembled in 30 minutes for ground transport within the trailer, and it is amphibious, with takeoffs and landings possible on water as well as smooth grassy surfaces — no airfield needed. The BlackFly's light weight is thanks in large part to carbon fiber/epoxy prepreg construc- tion. The company claims that the craft uses 245 watt-hours per mile (wh/mi), compared to a gasoline powered car at 1233 wh/mi, and that noise is comparable or slightly less than the noise made by a typical car or a motorcycle at highway speed. An interesting video at Opener's Web site shows the craft being flown. If rotorcraft is your preference, Safari Helicopter (Marianna, FL, US) showed its ultralight class Safari 400 and Safari 500 helicopter kit-built craft. Safari Helicopter has been in busi- ness for nearly 60 years under a succession of names, and its current owners showed at Oshkosh 2018, for the first time, a carbon fiber composite cabin, as an option to replace sheet metal (the cabin frame is chromoly steel tubing). Rotor blades are also carbon fiber composite/extruded aluminum. Another personal helicopter already familiar to CW readers was on display again: the short-hop Surefly VTOL craft from Workhorse (Loveland, OH, US). The company's goal is to make SureFly safer and more stable than a typical helicopter with redundant design, which includes four folding carbon fiber composite propeller arms, two fixed contra-rotating propel- lers on each arm, a backup battery system to drive the electric motors in the event of engine failure and a ballistic parachute that safely brings down the craft if needed. The SureFly's fuselage and propellers are made of carbon fiber composites to provide lightweight and durability. EAA is already looking ahead to the 2019 event, to be held July 22-28, says Pelton. "We are celebrating our 50th consecutive year in Oshkosh during 2019, so we'll be planning activities that involve EAA's hometown and its unique place in aviation history. We're looking forward to announcing features and attractions very soon."

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