Robinson Helicopters R44 Cadet vs Robinson Helicopters R44 Raven Ii vs Robinson Helicopters R66
All three aircraft are light, civilian helicopters, but they sit in different capability tiers. The Robinson R44 Cadet and R44 Raven II are both four-seat piston singles in the same basic family; the key practical difference is that the Cadet is optimized for training and lighter loads, while the Raven II is the more fully equipped, higher-gross-weight variant aimed at broader utility. In passenger terms, both are generally operated as up to four seats including the pilot, though real-world occupancy depends on fuel and weight limits. Their range is broadly similar—typically a few hundred nautical miles—again varying with fuel carried, power settings, and payload. The Robinson R66 moves up a class: it is a five-seat, single-turbine helicopter designed for higher performance, greater useful load, and more flexibility for passenger and mission equipment. Compared with either R44 variant, the R66 generally offers a longer practical range and better hot-and-high capability, while also carrying an additional passenger seat, making it the more capable choice for touring, light utility work, and faster point-to-point trips.
| Spec | ROBINSON R44 Cadet | ROBINSON R44 Raven II | ROBINSON R66 |
|---|---|---|---|
| Summary | |||
| DOC / nm | $ 2.22 | $ 2.36 | $ 3.49 |
| Total Seats | 2 | 4 | 5 |
| Flight Rules | VFR | VFR | VFR |
| Manufacturer | Robinson Helicopters | Robinson Helicopters | Robinson Helicopters |
| Aircraft Name | R44 Cadet | R44 Raven II | R66 |
| Certification | FAA / EASA | FAA / EASA | FAA / EASA |
| Max Range (nm) | 300 | 300 | 350 |
| DOC / nm / Seat | $ 1.11 | $ 0.59 | $ 0.70 |
| OEM Verification | Un-Verified | Un-Verified | Un-Verified |
| Useful Load (lbs) | 763 | 995 | 1355 |
| Direct Operating Cost | $ 238 | $ 257 | $ 384 |
| Flight Deck (Base Spec) | Gyro / Analog | Gyro / Analog | Gyro / Analog |
| Max Cruise Speed (ktas) | 107 | 109 | 110 |
| Base Aircraft Price (USD) | $344,000 | $ 490,000 | $ 920,000 |
| Cockpit | — | — | 2 |
| Min Crew | — | — | 1 |
| Standard Cabin Seats | — | — | 3 |
| Cabin | |||
| Total Seats | 2 | 4 | 5 |
| Cockpit | — | — | 2 |
| Min Crew | — | — | 1 |
| Standard Cabin Seats | — | — | 3 |
| Engine | |||
| FADEC | No | No | No |
| Model | O-540 | IO-540 | RR300 |
| Fuel Type | AvGas | AvGas | JetFuel |
| TBO (hrs) | 2200 | 2200 | 2000 |
| TBO (yrs) | 12 | 12 | — |
| Horsepower | 210 | 245 | 300 |
| Fuel Delivery | Carbureted | Fuel Injected | — |
| No. of Engines | 1 | 1 | 1 |
| Fuel Capacity (gal) | 29.5 | 29.5 | 73.6 |
| Dimensions | |||
| Length (ft) | 38.3 | 38.3 | 38.3 |
| Overall Height (ft) | 10.8 | 10.8 | 11.4 |
| Rotor Diameter (ft) | 33 | 33 | 33 |
| Baggage Volume Int. (cu. ft) | 2.5 | 2.5 | — |
| Cabin Volume (cu. ft) | — | — | 50 |
| Baggage Volume Ext. (cu. ft) | — | — | 18 |