The 685 was certified on September 17, 1971 per CAR 3. The 685 has a gross weight of 9000 pounds and is basically the same as the 690 with the following exceptions: Continental engines GTSIO520-K, Slight change in wing structure at the engine attach area, the picture window was divided into two individual windows in the pressure cabin and structural changes to the fuselage. The 685 was the final iteration of piston powered Twin Commander designs.
Specification Performance Kit FinderSpan | 46.66′ | 14.22m |
Length | 42.11′ | 12.83m |
Height | 14.11′ | 4.30m |
Tread | 15.50′ | 4.72m |
Cabin Entry Door | 3. 91’ x 2.21’ | 1.19 x 0.67m |
Cabin Height (Inside Interior) | 4.55' | 1.38m |
Cabin Length | 14.41′ | 4.39m |
Cabin Width (Inside Interior) | 4.33′ | 1.31m |
Cabin Volume (incl cockpit) | 224 ft³ | 68.27m³ |
Baggage compartment height | 3′ | 0.91m |
Baggage compartment width | 3.83′ | 1.16m |
Baggage compartment length | 4.83′ | 1.47m |
Baggage compartment volume | 43 ft³ | 13.10 m³ |
Baggage door height | 2.60′ | 0.79m |
Baggage door width | 1.64′ | 0.49m |
Baggage compartment load limit | xxx lbs | xxx kg |
Hartzell C8475+2/FC8475+2 (blades) / HC-H3YN-2/-2F (Hubs)
Continental GTSIO-520-F /-K
Max Ramp Weight: | 9050 lbs./ 4105 Kg |
Take-off Weight: | 9000 lbs./ 4082 Kg |
Landing Weight: | 9000 lbs./ 4082 Kg |
Standard Empty Weight: | 6021 lbs./ 2731 Kg |
Useful Load: | 3029 lbs./ 1373 Kg |
Zero Fuel Weight: | x,xxx lbs/x,xxx kg |
Baggage Compartment Load Limit: | 600 lbs./ 272 Kg |
Max Speed (100%) (TAS) | 278 MPH / 242 KTS |
Normal Cruise (24,000 Ft) (TAS) | 255 MPH / 222 KTS |
Normal Cruise (10,000 Ft) (TAS) | 230 MPH / 200 KTS |
Twin Engine Best Rate of Climb Speed (CAS): | xxxmph/xxxkts |
Twin Engine Best Angle of Climb Speed (CAS): | xxxmph/xxxkts |
Single Engine Best Rate of Climb Speed (CAS): | xxxmph/xxxkts |
Single Engine Best Angle of Climb Speed (CAS): | xxxmph/xxxkts |
Minimum Single Engine Control Speed (CAS) | 89 MPH / 77 KTS |
Stall Speed (Clean, CAS) | 93 MPH / 81 KTS |
Stall Speed (Dirty, CAS) | 86 MPH / 75 KTS |
Stall Speed, Gear and Flaps Down (CAS): | xxmph/xxkts |
Cruise Range (Standard Fuel, No Reserve) | 1440 SM / 1251 NM |
Cruise Range (Auxiliary Fuel, No Reserve) | 1904 SM / 1655 NM |
Cruise Range (Standard Fuel, 45 min Reserve) | 1274 SM / 1107 NM |
Cruise Range (Auxiliary Fuel, 45 Min. Reserve) | 1731 SM / 1504 NM |