ROTTOWIRE Dynamic Takeoff Speed Calculation
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Solution Overview
Problem
Current aircraft takeoff systems face limitations in maximum weight and minimum runway length due to thrust constraints, requiring operators to either increase thrust or runway length, which is undesirable, and lack a dynamic decision-making capability to adapt to real-time conditions during takeoff.
Innovation Solution
A computer-coded system, ROTTOWIRE, senses current location, acceleration, and speed to create a dynamic runway extension speed, allowing for increased takeoff weight without thrust increase or reduced runway length without weight decrease, by determining the distance to a designated height and presenting a real-time decision speed to the operator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If takeoff thrust is increased to overcome maximum weight limitations, then takeoff weight can be increased, but thrust production increases and operational flexibility decreases
Solution Approach 1:
The system dynamically adjusts the decision speed (V1) during the takeoff roll based on real-time monitoring of actual acceleration, location, and speed profile deviations from pre-calculated values. This dynamic adjustment allows the aircraft to safely take off at maximum or increased weights without requiring increased thrust production, as the system adapts the decision-making parameters to actual performance conditions
Solution Approach 2:
The system changes the decision speed parameter (V1) from a fixed pre-calculated value to a dynamically adjusted value based on actual takeoff performance. By monitoring deviations in acceleration and speed profile and adjusting V1 accordingly, the system enables takeoff at higher weights without requiring increased thrust, effectively decoupling weight capability from thrust production
2Weight of moving object
If runway length is increased to overcome minimum runway length requirements, then takeoff can be performed at maximum weight, but runway availability is reduced and operational flexibility decreases
Solution Approach 1:
The system dynamically adjusts the decision speed (V1) during takeoff based on real-time performance monitoring, allowing the aircraft to achieve safe takeoff conditions on shorter runways. By adapting V1 to actual acceleration and speed profile deviations, the system enables maximum weight takeoffs without requiring extended runway length, effectively decoupling weight capability from runway length requirements
Solution Approach 2:
The system continuously monitors actual takeoff performance parameters (acceleration, speed, location) and provides feedback to dynamically adjust the decision speed (V1). This closed-loop feedback mechanism allows the aircraft to compensate for performance variations and achieve safe takeoff on shorter runways at maximum weight, eliminating the need for increased runway length
3Ease of operation
If pre-calculated book values are used for takeoff performance, then takeoff can be planned before flight, but real-time conditions during takeoff roll cannot be adapted
Solution Approach 1:
The system performs preliminary calculation of the speed profile and decision speed (V1) before takeoff based on expected conditions. This pre-planning provides a baseline for takeoff performance, enabling operators to prepare takeoff parameters in advance while maintaining the capability to adapt to actual conditions during the takeoff roll through real-time monitoring and dynamic adjustment
Solution Approach 2:
The system transitions from static pre-calculated decision speed values to dynamic real-time adjustment of V1 based on actual takeoff performance. By monitoring deviations in acceleration and speed profile during the takeoff roll and adjusting V1 accordingly, the system combines the benefits of pre-planning with real-time adaptability to actual flight conditions
4Length of stationary object
If thrust is reduced to decrease takeoff weight, then runway length requirement decreases, but takeoff weight capability is reduced
Solution Approach 1:
The system changes the decision speed parameter (V1) from a fixed pre-calculated value to a dynamically adjusted value based on actual takeoff performance. By monitoring deviations in acceleration and speed profile and adjusting V1 accordingly, the system enables takeoff at higher weights without requiring increased thrust, effectively decoupling weight capability from thrust production
Solution Approach 2:
The system continuously monitors actual takeoff performance parameters (acceleration, speed, location) and provides feedback to dynamically adjust the decision speed (V1). This closed-loop feedback mechanism allows the aircraft to compensate for performance variations and achieve safe takeoff on shorter runways at maximum weight, eliminating the need for increased runway length
Data Source
AI summary
Embodiments are disclosed for a machine and process that include a computer code specially programmed for creating a runway extension speed for an aircraft taking off. The process may include sensing current location, current acceleration, and current speed, for the aircraft during takeoff roll; receiving, in a ROTTOWIRE, the current speed and the current acceleration for the aircraft; creating in the ROTTOWIRE an actual speed profile; creating, using a specially coded program in the ROTTOWIRE and the current acceleration, the runway extension speed via determining, for a current location of the aircraft, a distance from a departure end of the runway and a terminating distance required to terminate the takeoff to a stop of the aircraft on the runway, a distance until the aircraft reaches a designated height; and when the terminating distance equals the distance from the departure end of the runway; and presenting the runway extension speed.