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83 operations information such as the UAS unique identifier, UAS location via GPS coordinates, UAS launch location, mission type and operator contact information. It will provide a tracking solution independent of an LTE or satellite network, and air-to-air functionality to general aviation aircraft equipped with DroneAware receivers. uAvionix is building DroneAware receivers into its GA and UAS product line to alert pilots of nearby drone operations. Inertial Sense unveiled a ruggedised version of the μINS, a GPS- aided INS that outputs angular rate, linear acceleration, magnetic field, barometric altitude and GPS WGS84 coordinates. “This rugged version uses an aluminium casing that allows our units to be flown in slightly harsher environments with water, dust or extreme temperatures,” said Jonny Tullis. “All our units are temperature-calibrated to fly with expected accuracy from -40 to +85 C.” The company also expects to be able to announce new features later in the year that are aimed at improved accuracy, wider applications and uses in unmanned ground systems. Sean Hilbert of Cobra Aero told us of a joint project with Power4Flight and Currawong to customise the Desert Aircraft DA 100. The upshot is the B100i, sold by Power4Flight. It has electronically controlled fuel injection developed jointly by the three parties (using a Currawong ECU) and an enhanced exhaust system “That makes the engine quite a bit quieter than the propeller at all but low speeds,” said Hilbert. He reported that the new exhaust contains no packing “since typically that has a short life”. Instead, he said, “A series of chambers and baffles break up the sound waves and cause them to interfere with each other, cancelling each other out. The design was a project by Cobra Aero using 1D computer modelling.” Another feature of the B100i is ducting designed to ensure that most of the incoming air goes over the head fins. The duct is printed Nylon, which permits sophisticated channelling, Hilbert noted. A flap at the entrance to it controls inflow, and thus cylinder head temperature and the flap in turn is under the control of the ECU, according to readings from a head temperature sensor. Hilbert said this active cylinder head temperature control, via a controllable duct, is a feature of the latest version of Cobra Aero’s A33N, the 33.4 cc air- cooled two-stroke single profiled in UST 12 (February/March 2017). Later this year there will be heavy-fuel version, the A33H. This will use injection directly into the crankcase rather than through the throttle body, as is more appropriate to the use of heavy fuel. Hilbert added that the A33i recently gained FAR 33 endurance certification, which is a requirement of the US military. “We actually modified the test to make it tougher,” he said. “This certification expands our customer base. Gladiator Technologies showcased its SX-series of IMUs at the show. They are designed as tactical-grade IMUs, and feature low noise. “Our LandMark 60 IMU is among our lowest-noise products, at 0.0016 s/ √ Hz rate sensor ARW,” said Eric Yates. “That capability comes from more than 12 years of MEMS inertial system r&d.” Data output rates of up to 8 kHz with external sync are also possible within the series, owing to proprietary embedded software developed at the company. “We believe the stabilisation market can take best advantage of these qualities.” Yates added. “The combination of low noise and high data rates allows us to capture high dynamic motion with minimal latency even with a digital signal output.” MKS Servos unveiled its new Zeus family of small servos, designed for commercial UASs. “We are designing these products with IP-67 down to IP-65 environmental sealings, as well as CAN and serial bus protocols,” said Thomas Cooke. “The series ranges from our 7 g Z-900 IP-67 waterproof micro-servo to our P-600 and P-500, which have the CAN bus protocol incorporated – these will be available later this year. “We’re also putting g -sensors in these products so you can see what sorts of loads are being borne through each servo. “After landing the UAV, you can see exactly what the full picture of flight conditions were, in the servos instead of just in the autopilot.” Unmanned Systems Technology | June/July 2018 Inertial Sense’s μINS is now available as a ruggedised version The B100i is a joint project of Cobra Aero Power4Flight and Currawong