Aircraft rely heavily on air data computers (ADC) to provide vital airspeed and altitude parameters that are essential to safe and efficient operation. High accuracy data is especially important for high altitude flight where the difference between stall speed and the critical Mach number is much lower. Rotorcraft experience some unique phenomena because of rotor downwash which can affect the accuracy of pressure measurements, particularly in take-off, landing and in the hover. Rotorcraft fleets also often consist of different aircraft and this can create additional logistics overheads as air data units must be separately calibrated for each aircraft type.
High accuracy, low drift sensors can be used to provide pilots and autopilots with the information they need to travel at high altitudes safer. The effects of rotor downwash can be alleviated with mechanical dampening which effectively filters the pneumatic noise in air pressure although this approach adds weight, takes space and increases the maintenance burden on the operator. Multiple aircraft can be fitted with identical ADCs as long as each ADC is capable of holding multiple sets of configuration data to match the target platform.
Curtiss-Wright has developed technologies within its ADC product line to address these needs. High accuracy vibrating cylinders are available to provide stable data for high altitude applications while digital filtering technology mitigate rotor downwash effects. The needs of diverse fleets are simplified with a single unit being usable on up to 15 different platforms through a simple pin-out selection. Aircraft benefit with safer high altitude flight, weight savings and lower spares inventory which eases logistics and maintenance burdens.
ESCADU can store up to 15 configurations in a single unit allowing a unit with the same part number to be used across 15 different aircraft platforms. This reduces the cost of ownership through reduced spares requirements and simplified, flexible fleet management. It uses digital filtering to counter the effects of downwash, eliminating the need for mechanical damping systems such as large volumes attached to Pitot Static pipework. ESCADU has a prestigious pedigree and is in operation on some of the most well established platforms in aerospace.
The ADCM provides high accuracy data (up to +/- 0.25 Bar) consistently over long periods by using high accuracy, low drift sensors that reduce maintenance overhead. It is a custom product using technology that will forge the future of the Curtiss Wright Air Data Computer product line.
The CCADTS-2 is an Air Data Test Set which applies pressure to the Pitot and Static ports of an aircraft and performs all testing functions required to calibrate air data cockpit instruments in situ. It can be operated by one person only and reduces aircraft ground time and calibration costs.
An example of how our experience results in innovations is optimizations for rotorcraft. The benefits include software that can automatically compensate for rotor downwash and the effects of air down rush during climbing.
|Product Name||Form Factor||Accuracy||Software Configurable||Classification||Other|
|ESCADU Enhanced Software Configurable Air Data Unit||Stand-alone||High||Yes||Primary||Stores up to 15 seperate aircraft configurations|
|ADCM Air Data Computer Module||Custom module||V. High||Yes||Primary||Uses low drift sensors|
|CCADTS-2 Computer Controlled Air Data Test Set||Stand-alone||V. High||Yes||Test||Calibrates cockpit instruments in situ|