Curti Zefhir vs Robinson Helicopters R22 Beta Ii vs Robinson Helicopters R44 Raven I vs Robinson Helicopters R44 Raven Ii vs Robinson Helicopters R66

The Curti Zefhir is a light, fixed‑wing sport aircraft (typically LSA/ultralight class depending on configuration). It generally carries two people and, compared with the Robinson helicopters, tends to offer the longest range for a given fuel load thanks to higher cruise efficiency, making it better suited to point‑to‑point travel rather than hovering or confined‑area work. The Robinson R22 Beta II is a two‑seat piston helicopter, often used for training and short local missions; its practical range is the shortest of the group and passenger capacity matches the Zefhir at two. The Robinson R44 Raven I and Raven II are four‑seat piston helicopters in the next size class up, offering notably more passenger capacity than the Zefhir and R22. Between them, the Raven II is the more powerful, higher‑gross‑weight variant and commonly delivers slightly better real‑world performance and payload, with range broadly similar to (and often modestly better than) the Raven I depending on tanks and mission profile. The Robinson R66 is a five‑seat turbine helicopter, typically offering the greatest passenger capacity and a longer, more flexible range than the piston Robinsons, with higher altitude and hot‑and‑high capability.