Airbus Helicopters H225 vs Bell 525 Relentless vs Piper M600 Sls vs Robinson R66

The Airbus H225 and Bell 525 Relentless are large, long-range, twin‑engine helicopters aimed at offshore, SAR, and VIP/utility missions. The H225 generally offers very high passenger capacity and strong heavy-lift capability, typically carrying around 16–19 passengers with ranges commonly in the 400–500+ nautical mile class depending on fit. The Bell 525 is a newer-generation super‑medium with similar mission intent, usually configured for about 16 passengers and offering comparable or slightly better range potential in the roughly 500+ nautical mile class, again depending on payload and reserves. The Robinson R66 is a much smaller, single‑engine turbine helicopter used for light utility and private missions, typically seating 4–5 people with a range often around 300–350 nautical miles. The Piper M600 SLS is not a helicopter but a single‑engine turboprop airplane. It typically seats up to 6 and, as a fixed‑wing aircraft, offers substantially longer range than the R66 and often competitive or greater range than many helicopters, commonly on the order of 1,000+ nautical miles.