Search results
Results from the WOW.Com Content Network
The cost index is a number used in the Flight Management System (FMS) to optimize the aircraft's speed. It gives the ratio between the unit cost of time and the unit cost of fuel.
During a flight the cost mainly comes from two different things: the hourly crew cost and the fuel cost, both depends on time. The cost index synthesizes both costs in order to minimize the cost of a specific flight by giving priority to the fuel consumption or the flight time.
Definition. The ratio of fuel costs to all other costs. Description. Cost Index (CI) is nothing new - most Flight Management System have been using it in some format for years. The lower the CI, the more "importance" the machinery places on saving fuel.
COST INDEX = COST OF TIME / COST OF FUEL. Therefore CI is a kind of dimensionless coefficient showing the ratio of time cost to fuel cost. CI is used to take into account the relationship between fuel-related costs and time-related costs. With time-related costs, the faster the aircraft is flown, the more money is saved in time costs. This is ...
What is a Cost Index (CI) on aircraft and how do airlines use them to reduce costs? What factors are considered when deciding on the best Cost Index?
the ci is the ratio of the time-related cost of an airplane operation and the cost of fuel. the value of the ci reflects the relative effects of fuel cost on overall trip cost as compared to time-related direct operating costs. time cost ~ $/hr in equation form: ci = Fuel cost ~ cents/lb.
COST INDEX DEFINED. The CI is the ratio of the time-related cost of an airplane operation and the cost of fuel. The value of the CI reflects the relative effects of fuel cost on overall trip cost as compared to time-related direct operating costs.
Unfortunately, airlines cannot afford such a luxury and need to ensure the correct balance is struck between these two conflicting costs, which is where the Cost Index comes in. The Cost Index is defined as the cost of time divided by the cost of fuel (as shown below).
Cost Index – Basic Principles and Rules. The video explains what Cost Index really is, what it is not, and also offers some guidance on its use in the cockpit.
Cost index determines the CO 2 emissions of a flight by controlling aircraft speed. Optimal use of cost index could reduce CO 2 emissions by 1% per flight on average. Carbon pricing has very little effect on the cost index.