import { WeightAndBalanceDatum } from "../datum/datum";
import { WeightAndBalanceMoment } from "./result-types";
/**
 * Calculate the arm for an object in the aircraft by looking at the moment change
 * between two consecutive weighings and the known object weight. This is the more
 * generic version using the results from the empty weighing and then a weighing
 * with the object/person in the aircraft and weighed again.
 *
 * There are caveats with this result, so please read AIRW‐D011 Section 7.1 for more details
 *
 * @param emptyResult The base W&B result of the empty aircraft.
 * @param withObjectResult The calculated result from weighing with the object/person change
 * @returns The arm calculated from the two weighings
 */
export declare function calculateArm(emptyResult: WeightAndBalanceMoment, withObjectResult: WeightAndBalanceMoment): number;
/**
 * Calculate the amount of tail ballast needed in order to achieve the desired
 * loaded CG position. This calculation does not know the maximum amount of
 * water/blocks that can be placed in the tail, so the pilot must limit the
 * weight to what can be physically installed.
 *
 * If this is already at the aft CG, return 0.
 * If the pilot weight is outside the allowed seat range provided by the datum
 * return NaN.
 * If the pilot weight puts the MAC rearward from the desired MAC (ie requires
 * a negative weight in the tail), return NaN
 *
 * If the desired MAC range is not [0,100] throw an error
 *
 *
 * @param datum W&B datum details
 * @param emptyResult Base empty W&B result for the aircraft
 * @param cockpitWeight The combined weight of pilot, parachute and anything else in
 *   the cockpit that would move the CG forward
 * @param macPercent The percentage of Mean Aerodynamic Chord that is desired. 0 is forward CG limit, 100 is aftCGLimit
 * @returns The amount of weight to place the CG at the desired position. If this is not
 *   possible, return NaN.
 */
export declare function calculateTailBallastAmountForCGPosition(datum: WeightAndBalanceDatum, emptyResult: WeightAndBalanceMoment, cockpitWeight: number, macPercent: number): number;
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