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Octopus ISR Syste,s Epsilon 180MG ISR Payload The most advance surveillance system 4 sensor – 4k EO, MWIR, LRF, LP Payload 180(D) X 215(H) MM 3.25 KG Installation: nose or belly mounted WATCH VIDEO PRESENTATION To scan QR code and see the video, open your phone's camera application and point it steadily for 2-3 seconds towards the QR Code. Onboard h.265 compression / Stabilization in 3 axis / Real time Target GEO location / MGRS system support / Onboard target tracker / Moving Target Indicator / Onboard video recording 32GB / Unicast and Multicast video stream / Picture in Picture dual video / Installation: nose or belly mounted. www.octopus-isr.cori Mejzlik has developed a propeller that can be used to drive an underwater unmanned vehicle down to depths of 6 km (writes Nick Flaherty). The two-blade propellor was designed by the UK’s National Oceanographic Centre for Mejzlik to build. The company had to find a way to bond a titanium hub to the carbon fibre propeller, and the construction had to be entirely free of voids that would otherwise cause the propellor to fail under pressure. A titanium hub was necessary as even stainless steel rusts in seawater under high pressure, and it was milled to produce the right surface to bond to the carbon fibre. A vacuum infusion process was developed to suck the resin into the mould rather than using traditional layering. Several types of carbon fibre were used in the resin to provide linear and torsional strength. The challenge was to get the resin to flow through the mould and combine with the fibres without leaving voids. The propellor was tested at pressures equivalent to a depth of 6 km without failure. It was then tested in Loch Ness, Scotland, the largest lake in the UK. The next stage is to look at protecting the leading edge of the propellor with titanium, by adding it in the moulding or glueing it on afterwards. Deep thinking for new prop Underwater vehicles The propeller can survive depths of 6 km (left) and was tested at Loch Ness, in Scotland