초록 ▼

A warning system for rotary wing aircraft compares the accumulated altitude loss after take-off of the aircraft with its altitude above ground, and generates a warning if the altitude loss is excessive for the altitude above ground at which the aircraft is flying. The position of the landing gear, t

A warning system for rotary wing aircraft compares the accumulated altitude loss after take-off of the aircraft with its altitude above ground, and generates a warning if the altitude loss is excessive for the altitude above ground at which the aircraft is flying. The position of the landing gear, the speed of the aircraft and its altitude enable the system only during the take-off and missed approach phases of operation in order to minimize nuisance warnings during other phases. The relationship between radio altitude and altitude loss required to generate a warning is optimized for rotary wing aircaft such as helicopters.

대표청구항 ▼

A warning system for providing a warning of a hazardous flight condition of a rotary wing aircraft during a take-off or a go-around after a missed approach phase of flight, comprising: means for providing a signal representative of the altitude of the aircraft above ground and the descent rate of th

A warning system for providing a warning of a hazardous flight condition of a rotary wing aircraft during a take-off or a go-around after a missed approach phase of flight, comprising: means for providing a signal representative of the altitude of the aircraft above ground and the descent rate of the aircraft; means responsive to the signal provided by said descent rate signal providing means for generating a signal representative of altitude loss of the aircraft; and means responsive to the altitude above ground signal providing means and said altitude loss signal providing means for detecting an excessive altitude loss and providing a warning indicative of excessive altitude loss when the aircraft is flying between approximately 20 and 200 feet of altitude above the ground and when the altitude loss exceeds approximately 15 feet at approximately 20 feet of altitude above the ground and approximately 50 feet at approximately 200 feet of altitude above the ground, wherein said altitude and descent rate signal providing means includes a radio altimeter, a barometric altimeter and a barometric rate circuit, wherein said altitude loss signal providing means includes an integrator that is responsive to the barometric rate circuit to provide the altitude loss representative signal, said warning system further including means for enabling the generation of a warning only when the aircraft is in a take-off or a go-around after a missed approach phase of flight, wherein the aircraft has landing gear movable between a down position and a retracted position, wherein said system includes means for providing a signal representative of the position of the landing gear, means for providing a signal representative of the airspeed of the aircraft, and wherein said enabling means includes means responsive to the landing gear position signal providing means, to the airspeed signal providing means and to the altitude signal providing means for generating a take-off mode enabling signal for enabling said warning system only when the landing gear is down, and the aircraft is below approximately 100 feet and either the airspeed of the aircraft is less than approximately 40 knots or the aircraft is below approximately 10 feet above the ground.