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GeneralRe: Scary Responsibility? Pin
Rick York10-Nov-21 5:07
mveRick York10-Nov-21 5:07 
GeneralRe: Scary Responsibility? Pin
Gerry Schmitz10-Nov-21 8:01
mveGerry Schmitz10-Nov-21 8:01 
GeneralRe: Scary Responsibility? Pin
Rick York10-Nov-21 9:21
mveRick York10-Nov-21 9:21 
AnswerRe: Scary Responsibility? Pin
DerekT-P10-Nov-21 2:14
professionalDerekT-P10-Nov-21 2:14 
AnswerRe: Scary Responsibility? Pin
JP Reyes10-Nov-21 4:51
JP Reyes10-Nov-21 4:51 
AnswerRe: Scary Responsibility? Pin
Eddy Vluggen10-Nov-21 6:01
professionalEddy Vluggen10-Nov-21 6:01 
AnswerRe: Scary Responsibility? Pin
Matt Bond10-Nov-21 6:26
Matt Bond10-Nov-21 6:26 
AnswerRe: Scary Responsibility? Pin
Private Dobbs11-Nov-21 0:18
Private Dobbs11-Nov-21 0:18 
Some years ago I created the software to monitor the jacks under an aircraft as it was being serviced. Basically you could put load x on jacks y to z and unzip the plane around the middle without it falling apart, that kind of stuff. The actual, aircraft is no longer flying but it was that one with the long pointy nose that flew at Mach 2 (no names, no pack drill!).

The whole project was being run by an engineering company so we were basically a sub contractor, the software was just down to me and it communicated with a "black box" that monitored the load cells on the jacks. We used an IBM PS2 computer which had been recently released and had a decent hi res graphics screen. The program had a configuration part where you entered the calibration information for each of the 15 or so load cells. When running it showed the load from each cell dynamically overlaid on an outline of the aircraft. Should a load exceed a preconfigured limit then a siren attached to the console would sound. I also supplied a detailed manual that covered all aspects of configuration and use.

So, the main contractor picked up the whole caboodle and took it off the the airport for delivery to the maintenance hangars, my business partner and I decided to visit too but when we got to the hangar they had not arrived. We went on into town for another appointment and called in again on the way back.

We were told that the main contractor had been but there were problems so thay had taken everything away with them.

Later that day, early evening I had a call from the manufacturers of the load cells. The whole system had been dropped off with them and they were testing it using their massive presses. They found the system was working 100% with significantly higher accuracy than the minimum requested.

Apparently an engineer had been busy jacking up the aircraft during the test. The jacks were manual and he began to have problems, so he fitted a 2ft extension to the jack handle and carried on before realising that something was not right and the actual load must be way more than what was displayed.

The main contractor had taken my manual, ripped off the covers and added their own but did not bother to read it. Each load cell had characteristics that were up to 100% apart so they had the wrong load cells aligned to the wrong calibration parameters thus the cells were reading way off.

So, now you know why said aircraft had a bent droopy nose Smile | :)
AnswerRe: Scary Responsibility? Pin
Peter Shaw11-Nov-21 5:34
professionalPeter Shaw11-Nov-21 5:34 
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rjmoses13-Nov-21 0:14
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GeneralHyperLink Pin
Lothar Rappsilber9-Nov-21 3:58
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OriginalGriff9-Nov-21 4:01
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trønderen9-Nov-21 5:53
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OriginalGriff9-Nov-21 6:21
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  Forogar  9-Nov-21 4:04
professional  Forogar  9-Nov-21 4:04 
GeneralMuch to learn the young Padawan still has... PinPopular
CodeWraith9-Nov-21 1:14
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Chris C-B9-Nov-21 1:48
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OriginalGriff9-Nov-21 2:18
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Tony Hill9-Nov-21 2:36
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pkfox9-Nov-21 5:23
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obermd9-Nov-21 3:37
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GeneralWSO CCC OTD 2021-11-09 Pin
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