Takeoff Acceleration Monitoring System
A Takeoff Acceleration Monitoring System automates the pilot monitoring of Distance to Go (DTG), "to sense, in a timely fashion the development of insufficient acceleration, which would extend the takeoff roll, perhaps precipitously".[1]
Over the years, recommendations have been made to develop a Take Off Performance Management System. The NLR and NASA developed TOPMS prototypes. However, these systems were never operationally introduced.[2]
EASA established two working groups (WGs) to address this issue. WG-88 focussed on the specification and standardization of On-Board Weight and Balance Systems (OBWBS), an ongoing effort for what is considered to be a feasible option. WG-94 focussed on standards and operational conditions for a TOPMS; it WG-94 was concluded early 2017, considering that TOPMS was not feasible, in particular due to limitations in technology and data availability.[2]
A version suitable for detecting gross errors, which can be integrated in existing avionics, has been proposed by National Aerospace Laboratory (NLR), KLM, and Martinair.[2]
A 2019 research paper explores the cause of a July 2017 serious incident, caused by erroneous data entry, where such system could have been useful. It "summarises a basic takeoff acceleration monitoring system and the effect this would have had on the July 2017 event".[3]
Functionality and Design
The Takeoff Acceleration Monitoring System (TAMS) is designed to provide real-time monitoring of an aircraft's acceleration during the takeoff roll. By continuously comparing the aircraft's actual acceleration against predicted performance metrics, TAMS helps pilots ensure that they are on schedule to reach critical speeds, such as V1 (the decision speed). This system utilizes various inputs, including runway conditions, aircraft weight, and environmental factors, to generate a performance profile tailored to each takeoff scenario. If the acceleration falls below expected thresholds, TAMS alerts the flight crew, allowing them to make informed decisions regarding whether to continue or abort the takeoff[4]
Related inventions
- Airplane takeoff and landing performance monitoring system[5]
References
- ^ Brown; Abbasi (2009-04-23). "Takeoff performance monitoring systems, technology, certificatability and operability status". National Research Council Canada. doi:10.4224/21268868.
- ^ a b c Benard, Bart (2019). "Take-Off performance incidents: do we need to accept them or can we avoid them?" (PDF). ISASI Technical Papers.
- ^ Hoare, Steve (2019). "Erroneous takeoff performance: Why the past is still highly relevant today" (PDF). ISASI Technical Papers.
- ^ US6175315B1, Millard, Wayne C. & Millard, Carl W., "Aircraft takeoff acceleration indicator system", issued 2001-01-16
- ^ Middleton (March 12, 1996). Airplane takeoff and landing performance monitoring system. NASA (Report). hdl:2060/20080005969.
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