690B Twin Commander
Specifications & Performance
The 690B first flew in 1976 and was similar to the 690A with increased weight ratings, two engine options and several modifications to the cabin interior including larger baggage space.
Specifications
Dimensions
| Wing span | 46.55′ | 14.19m |
| Length | 44.35′ | 13.52m |
| Height | 14.95′ | 4.56m |
| Tread | 15.42′ | 4.70m |
| Cabin Entry Door | 2. 21’ x 3.92’ | .67 x 1.19m |
| Cabin Height (Inside Interior) | 4.47′ | 1.36m |
| Cabin Length | 14.25′ | 4.34m |
| Cabin Width (Inside Interior) | 4.01′ | 1.22m |
| Cabin Volume | 224 ft³ | 6.34m³ |
| Baggage compartment height | 3.81′ | 1.16m |
| Baggage compartment width | 3.50′ | 1.07m |
| Baggage compartment length | 4.83′ | 1.47m |
| Baggage compartment volume | 46.5 ft³ | 1.32 m³ |
| Baggage door height | 2.60′ | .79m |
| Baggage door width | 1.64′ | .50m |
| Baggage compartment load limit | 600 lbs | 272 kg |
Propellers
Hartzell 3 blade, constant speed, full feathering and reversible
Power Plant
Honeywell TPE-331-5-251or TPE-331-5-252 single-shaft turbo-prop with integral gearbox, two-stage centrifugal compressor, three-stage axial turbine and single annular combustion chamber
Weights - Aircraft
| Ramp Weight: | 10,375 lbs/4,706 kg |
| Take-off Weight: | 10,325 lbs/4,683 kg |
| Landing Weight: | 9,675 lbs/4,389 kg |
| Standard Empty Weight: | 6,195 lbs/2,810 kg |
| Useful Load: | 4,180 lbs/1,896 kg |
| Zero Fuel Weight: | 8,750 lbs/3,968 kg |
| Baggage: | 600 lbs/272 kg |
Performance
Operating Speed
| Maximum Cruise | |
| (100% 12,000 ft.TAS@ 10,325 lbs/4,683 kg) | 327mph/284kts |
| Normal Cruise Speed | |
| (96%20,000 ft.TAS@ 10,325 lbs/4,683 kg): | 326mph/283kts |
| Twin Engine Best Rate of Climb Speed (CAS): | 161mph/140kts |
| Twin Engine Best Angle of Climb Speed (CAS): | 133mph/116kts |
| Single Engine Best Rate of Climb Speed (CAS): | 132mph/115kts |
| Single Engine Best Angle of Climb Speed (CAS): | 126mph/109kts |
| Minimum Control Speed (CAS): | 99mph/86kts |
| Stall Speed, Clean (CAS): | 94mph/82kts |
| Stall Speed, Gear and Flaps Down (CAS): | 89mph/77kts |
Cruising Ranges
Long range cruise at 288mph/250.3kts/463.4kmh (TAS) average at 31,000 ft., 9,449 meters, (96% rpm) with 45 min. fuel reserve: 1,688 SM/ 1,467 NM, 2,717 KM
High speed cruise range at 320mph/278kts/515kmh (TAS) average at 25,000 ft., 7,620 meters (96% rpm) with 45 min. fuel reserve: 1,192 SM/1,036 NM/1,918 KM
