Load cells monitor major aircraft refurbishment
A
Vishay Nobel product story
Edited by the Engineeringtalk editorial team
Oct 23, 2000
When Marshall of Cambridge Aerospace wanted to install a cargo door in an aircraft, the company used load cells from Nobel Systems to ensure that the fuselage did not distort during cutting
When Marshall of Cambridge Aerospace wanted to install a cargo door in the forward fuselage of Tristar-Freighter aircraft, the company used load cells from Nobel Systems to ensure that the fuselage did not distort during cutting.
The importance of the work can be measured by the fact that any distortion in the fuselage could result in unrecoverable damage to the fuselage, costing millions of pounds.
The cargo doors were being fitted as part of a process that would convert the aircraft from the existing passenger role to one of a freighter.
Prior to cutting the side of the Tristar-Freighter aircraft to form the door aperture, the forward fuselage had to be in a neutral load configuration equivalent to the original aircraft jig position.
This would ensure that there would be no distortion of the fuselage due to inherent stresses when the primary structure was severed and removed.
This is achieved by applying known loads to the structure to nullify the effects of the aircraft weight in order to accomplish a configuration which is as close as possible to the jig position.
Commenting on the application, Brian Wilson at Marshall said "At the specified locations, we interposed a Nobel load cell between each of the individual hydro-mechanical jacks and the aircraft structure.
These provided accurate measurements, in terms of the level of the loads applied and helped us to achieve the required structural configuration".
Marshall found that, by purchasing additional load cells, it was possible to work on three separate aircraft simultaneously.
Other benefits of the Nobel system included the ability to establish identical load magnitudes on successive aircraft.
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