A fire apparatus includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, a ladder assembly coupled to the chassis, and a stability system. The stability system includes at least one of (i) a front downrigger coupled to the chassis, (ii) a rear downrigger coupled the chassis, or an outrigger coupled to the chassis. The stability system is controllable to facilitate leaning the fire apparatus at least two degrees relative to a ground surface while maintaining full operational capability of the ladder assembly.

A utility vehicle, in particular a firefighting vehicle, comprising an extendable aerial apparatus like a turnable ladder and/or an aerial rescue platform, a jacking system with lateral ground supports for jacking the vehicle body, and a stabilization mechanism for preventing tilting of the vehicle body in its jacked state. The stabilization mechanism includes a hydraulically operable rear axle blocking device for blocking the rear axle suspension of the vehicle. The stabilization mechanism further includes at least one hydraulically lockable shock absorber integrated into the front axle suspension of the vehicle. The rear axle blocking device and the hydraulically lockable shock absorber are controlled by a common hydraulic control to lock the hydraulically lockable shock absorber at the same time or with a delay after activating the rear axle blocking device.

A utility vehicle, in particular a firefighting vehicle, comprising an extendable aerial apparatus like a turnable ladder and/or an aerial rescue platform, a jacking system with lateral ground supports for jacking the vehicle body, and a stabilization mechanism for preventing tilting of the vehicle body in its jacked state. The stabilization mechanism includes a hydraulically operable rear axle blocking device for blocking the rear axle suspension of the vehicle. The stabilization mechanism further includes at least one hydraulically lockable shock absorber integrated into the front axle suspension of the vehicle. The rear axle blocking device and the hydraulically lockable shock absorber are controlled by a common hydraulic control to lock the hydraulically lockable shock absorber at the same time or with a delay after activating the rear axle blocking device.

A quint configuration fire apparatus includes a chassis, a body assembly coupled to the chassis and having a storage area configured to receive a ground ladder and a fire hose, a pump coupled to the chassis, a water tank coupled to the chassis, a ladder assembly having a proximal end that is coupled to the chassis, a single front axle coupled to a front end of the chassis, and a single rear axle coupled to a rear end of the chassis. The center of gravity of at least one of the chassis, the body assembly, the pump, and the water tank are positioned to counterbalance a moment generated by a tip load with the ladder assembly extended to the horizontal reach of at least 90 feet.

A quint configuration fire apparatus includes a chassis, a body assembly coupled to the chassis and having a storage area configured to receive a ground ladder and a fire hose, a pump coupled to the chassis, a water tank coupled to the chassis, a ladder assembly having a proximal end that is coupled to the chassis, a single front axle coupled to a front end of the chassis, and a single rear axle coupled to a rear end of the chassis. The center of gravity of at least one of the chassis, the body assembly, the pump, and the water tank are positioned to counterbalance a moment generated by a tip load with the ladder assembly extended to the horizontal reach of at least 90 feet.

A level indication system for a vehicle includes a control system. The control system is configured to acquire stability data regarding a stability characteristic of the vehicle at a current location, determine whether the stability characteristic is within an operational range, provide a first indication that the vehicle is reconfigurable at the current location into an operable state in response to determining that the stability characteristic is within the operational range, and provide a second indication that the vehicle is not reconfigurable at the current location into the operable state in response to determining that the stability characteristic is within a nonoperational range.

A level indication system for a vehicle includes a control system. The control system is configured to acquire stability data regarding a stability characteristic of the vehicle at a current location, determine whether the stability characteristic is within an operational range, provide a first indication that the vehicle is reconfigurable at the current location into an operable state in response to determining that the stability characteristic is within the operational range, and provide a second indication that the vehicle is not reconfigurable at the current location into the operable state in response to determining that the stability characteristic is within a nonoperational range.

A fire apparatus includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, a ladder assembly coupled to the chassis, and a stability system. The stability system includes at least one of (i) a front downrigger coupled to the chassis, (ii) a rear downrigger coupled the chassis, or an outrigger coupled to the chassis. The stability system is controllable to facilitate leaning the fire apparatus at least two degrees relative to a ground surface while maintaining full operational capability of the ladder assembly.

A level indication system includes a sensor system and a control system. The sensor system is positioned to acquire stability data regarding a stability characteristic of a vehicle at a current location. The stability characteristic includes at least one of a slope, a grade, or a jackknife angle. The control system is configured to determine whether the stability characteristic is within an operational range or a nonoperational range, provide an indication that the vehicle is reconfigurable at the current location into a state whereby the vehicle is operable at the current location in response to determining that the stability characteristic is within the operational range or an indication that the vehicle is not operable at the current location in response to determining that the stability characteristic is within the nonoperational range, and facilitate engaging a stabilization system of the vehicle in response to the stability characteristic being within the operational range.

A level indication system includes a sensor system and a control system. The sensor system is positioned to acquire stability data regarding a stability characteristic of a vehicle at a current location. The stability characteristic includes at least one of a slope, a grade, or a jackknife angle. The control system is configured to determine whether the stability characteristic is within an operational range or a nonoperational range, provide an indication that the vehicle is reconfigurable at the current location into a state whereby the vehicle is operable at the current location in response to determining that the stability characteristic is within the operational range or an indication that the vehicle is not operable at the current location in response to determining that the stability characteristic is within the nonoperational range, and facilitate engaging a stabilization system of the vehicle in response to the stability characteristic being within the operational range.