100 “It can be used by our products or other navigation hardware that need GNSS corrections via RTCM. Users gain access on rtkapp.sensorcloud.com by signing up for a monthly or annual service plan. All plans provide unlimited corrections along with access to True RTK or Virtual RTK. The other scale-enabling benefit allows users to leverage existing internetconnected platforms to access our RTK corrections via our NTRIP API for reduced costs in high-volume deployments,” Fager explained. “It’s especially aimed at continuously operating robotic systems and swarms that rely on centimetre-level navigation accuracy constantly.” We last featured INNengine in Issue 53 (Dec 2023/Jan 2024) for its Rex-B four-cylinder, two-stroke, camdriven axial engine. Since then, the company has made a number of updates to both the Rex-B and its larger e-REX engines, based on close feedback across the aviation and automotive spaces. “The last Rex-B we showed you was the REX-B_125, a 125 cc engine and the initial iteration of this technology was intended to suit high-end model aircraft. For industrial UAV manufacturers, we’ve now designed the REX-B_300,” said Rubén Garrido Requena at INNengine. “As well as 300 cc displacement, it’s a more durable engine because we’ve improved the lubrication and separated it from the fuel, and we’ve improved the power efficiency.” The company was prepared to integrate liquid cooling, but found very few customers wanted that, citing extra weight and hassle. Instead, the lubrication has been designed to cycle oil via the cylinder head, which, combined with air cooling, has enhanced the engine’s thermal management and stability. Meanwhile, the company has iterated its e-REX liquid-cooled automotive engine into the 700 cc e-REX_700, with 300 hours of test bench running accumulated on the e-REX technology, as of the time of writing, to test the wide range of parallel advancements achieved across its subsystems over the past year. “For example, we’ve switched from port injection to direct injection in its four cylinders, with a high-pressure pump directly integrated onto the engine,” Garrido says. “Additionally, as an opposed-piston engine, the e-REX needs a scavenging pump to compensate for the constant power generation. So, we’ve integrated a twin-screw compressor, which gives very linear induction across a very wide range of use-cases.” INNengine is currently engaged with two publicly disclosable projects: one with a large OEM interested in using the REX-B_300 as an APU, and one with Horse (former a sole Renault subsidiary but now merged with ARAMCO and Geely) with an MoU to test and validate the e-REX_700, and then its exclusive licensing and volume-manufacture should all tests be passed. Power4Flight unveiled its IntelliGen HP, a higher-power version of its IntelliGen PMU (also with an integrated starter-generator controller), developed following widespread customer requests for management of higher voltage and higher power across aircraft, payloads and hybridised powertrains. “We learned a lot from the standard IntelliGen, and so we developed a new control schema built around field-oriented control rather than trapezoidal six-step control, which will provide a lot more performance and flexibility in operations,” said Shaun Cochran of Power4Flight. “We’ve also added internal heat sinks, to better pull heat out of the device and into the housing exterior via direct metalto-metal contact, so the unit runs more efficiently than in the old design that just used thermal compounds.” The new IntelliGen HP has also been made more configurable than its predecessor. While the older system could have just two low-voltage DC outputs of either 6 or 12 V (or one of each), the HP is internally softwareselectable for different missions and the differing low-voltage payloads (or other subsystems) that a UAV operator might need to hot-swap. Omnetics spoke with us about two new innovations across its lines of cable assemblies. The first was a new line of Nano-D, high-speed, high-performance interconnects. “To design that new Nano-D line, we’ve modified the spacing of the insulator for the contacts, and we’re achieving up to 20 Gbits per line with less than 8 dB of impedance losses,” said Omnetics’ Scott Unzen. “Using parallel-pair cabling, each contact matches two lines to the ground, with spacing between each group of August/September 2025 | Uncrewed Systems Technology INNengine has matured and updated its engine portfolio with the 300 cc REX-B_300 and 700 cc e-REX_700
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