Airbus Helicopters H225 vs Bell 525 Relentless vs Md Helicopters (mcdonnell Douglas) 902 Explorer vs Robinson R66

The Airbus H225 and Bell 525 Relentless sit in the heavy/super‑medium offshore class, prioritizing long overwater range and high payload. The H225 is the larger of the two and typically carries around 16–19 passengers in an offshore layout, with long range on the order of roughly 450–500+ nm depending on tanks and mission equipment. The Bell 525 targets a similar mission set with about 16 passengers typical and comparable long‑range capability, often cited in the same ~450–560 nm bracket depending on configuration. The MD Helicopters (McDonnell Douglas) 902 Explorer is a light twin, usually configured for about 6–8 passengers (often 1–2 crew plus passengers), with a notably shorter range than the offshore machines, commonly around ~250–350 nm depending on payload and reserves. The Robinson R66 is a light single, generally 4 passengers plus a pilot (5 seats total), optimized for cost and simplicity rather than endurance; its practical range is typically in the ~300–350 nm neighborhood, varying strongly with load, fuel, and power margins.