...t raise or lower the landing gear unless the hydraulic pumps are operating. Perhaps they left the engines running too! There is also a circuit that routes through a microswitch on the undercarriage. If there is weight on the wheels, the circuit will be broken and the undercarriage cannot be retracted. Only when the aircraft is airborne is the circuit completed...

...'t raise or lower the landing gear unless the hydraulic pumps are operating. Perhaps they left the engines running too! There is also a circuit that routes through a microswitch on the undercarriage. If there is weight on the wheels, the circuit will be broken and the undercarriage cannot be retracted. Only when the aircraft is airborne is the circuit ...

... can't raise or lower the landing gear unless the hydraulic pumps are operating. Perhaps they left the engines running too! There is also a circuit that routes through a microswitch on the undercarriage. If there is weight on the wheels, the circuit will be broken and the undercarriage cannot be retracted. Only when the aircraft is airborne is the circuit ...

... can't raise or lower the landing gear unless the hydraulic pumps are operating. Perhaps they left the engines running too! There is also a circuit that routes through a microswitch on the undercarriage. If there is weight on the wheels, the circuit will be broken and the undercarriage cannot be retracted. Only when the aircraft is airborne is the circuit completed, ...

...'t raise or lower the landing gear unless the hydraulic pumps are operating. Perhaps they left the engines running too! There is also a circuit that routes through a microswitch on the undercarriage. If there is weight on the wheels, the circuit will be broken and the undercarriage cannot be retracted. Only when the aircraft is airborne is the circuit completed, allowing...

... You can't raise or lower the landing gear unless the hydraulic pumps are operating. Perhaps they left the engines running too! There is also a circuit that routes through a microswitch on the undercarriage. If there is weight on the wheels, the circuit will be broken and the undercarriage cannot be retracted. Only when the aircraft is airborne is the circuit completed, allowing ...

... a 36", 6-burner Wolf Rangetop, and after three years I am very happy with it. There is one quirky microswitch that occasionally fails to turn on the spark igniter (Wolf says that the microswitches are adjustable, but it looks like a couple of hours of work to get at them and probably more to reinstall). ...