Takeoff weight computer apparatus for aircraft
US4490802A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G19/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The takeoff weight of an aircraft is computed from measures of the thrust of the engines and the forward acceleration of the aircraft detected over a time period when such acceleration is at a maximum following brake release on the runway. A major variable that must be considered is the coefficient of rolling friction of the landing gear of the particular aircraft involved and other factors inducing ground roll drag. The present invention calculated this variable as a function of engine thrust and manifest weight for each takeoff of the aircraft and updates weighted filter values thereof for use during subsequent takeoffs. For each takeoff, therefore, and average value of rolling friction is used to calculate takeoff weight, which average value becomes more nearly the actual value for the existing condition of the landing gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.