Uncrewed Systems Technology 044 l Xer Technolgies X12 and X8 l Lidar sensors l Stan UGV l USVs insight l AUVSI Xponential 2022 l Cobra Aero A99H l Accession Class USV l Connectors I Oceanology International 2022

Xer Technologies X12 and X8 | Dossier the connection r&d going into the power management system to achieve resistances that are as low as were feasible to minimise their heat dissipation requirement. “Corrosion can be an issue with low- voltage connections, but we’ve protected them in various ways to reduce potential issues. We’ve also gone through a lot of cables and learning for the higher voltage battery and three-phase cables across the powertrain,” Skantze notes. Gasoline engine “By far the biggest of our three main challenges was cooling. It’s really difficult to do that well when you have such a lot of energy and power surging through a compact multi-rotor platform,” Skantze says. “In a two-stroke engine, you have maybe 20% of the energy in the fuel being transmitted through the pistons into the crankshaft’s power output; the rest is released largely as heat that needs to be dissipated.” The engines in both UAVs were therefore modified to respond better to the air cooling from the fans, or to integrate water-cooling circuits instead (Xer declines to say how it solved that issue). The X12 uses a 170 cc engine, while the X8 has a 120 cc unit. Both are boxer two- strokes built mostly from 7075 aluminium. “We’ve cut up the engines and opened up their cylinders, which is not something you’re really supposed to do,” Skantze says, “But it’s worked out well for us, and solved our problems, and in the long run we will of course look for safer approaches. “There are good engines on the market, however many of them were designed for running big propellers on their fronts. Not only do we not have those or the air wash they bring but our engines are contained in a protective housing where there would be really bad heat concentration without our proprietary solutions. We devised those with a lot of r&d into getting the We’ve carried out a lot of test flights and several of the test aircraft have sustained crashes with only minor damage; these are sturdy vehicles » Reliable in all Conditions in a Miniature Size » Highly Tested & Calibrated from -40°C to +85°C » Shocks and Vibrations Qualified to MIL-STD 810G 6 DoF Tactical Grade IMU 0.8°/h Gyro Bias Instability Accelerometers 6 µg Low Noise Gyro 0.08°/√h PULSE-40 IMU www.sbg-systems.com JOIN US at Eurosatory • Booth #GF367