Airbus Helicopters H155 vs Airbus Helicopters H175 vs Bell 525 Relentless vs Sikorsky S 76d

The Airbus H155 is typically positioned in the light–intermediate twin category, aimed at short to mid-range missions such as corporate and EMS; it generally carries about 12 passengers in an airline-style layout (or fewer in VIP configurations) and offers a practical range on the order of roughly 450–550 nm depending on fit and reserves. The Sikorsky S‑76D sits in a similar light–intermediate twin class, commonly configured for about 12 passengers, with a broadly comparable practical range often cited around 400–500 nm. Moving up a class, the Airbus H175 is a medium twin designed for higher payload and offshore utility; it is typically configured around 16–18 passengers and is commonly quoted with a range in the vicinity of about 500–650 nm depending on tanks and mission profile. The Bell 525 Relentless is also a medium twin in the same general competitive set as the H175, usually marketed for around 16 passengers, with published range figures commonly around roughly 550–700 nm depending on configuration and reserves.