A DC-8-63F W&B computer does... what?
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A DC-8-63F W&B computer does... what?
Good evening,
During a recent trip to a few scrap yards in the US, I bought a "Weight / CG Computer". At least I hope it is such a computer...
The strange thing about this device:
- Apparently, you have to dial in the weight in lbs and the CG in %MAC yourself.
- The only response that the computer seems to be able to give in return is on an analog scale "500---0---500".
Has anyone an idea what the scale is meant to indicate? And how this thing works? The D&O part of the CMM would be great...
A bit more info - the labels on the box show the following data:
- "Lockheed Aircraft Servicing Service Company"
- "DC-8-63F WT & BAL COMPUTER"
- "10061A100" (probably the part number)
- "002" (the serial number)
- "10/71" probably the manufacture date
The box is about 8cm wide, 6cm high, 10cm deep.
Apart from a "TEST" pushbutton, there seem to be remains of a three position switch ("OFF", "WT", "CG") on the front.
The backside has a bay for a fuse, and a connector for 19 pins (five are unused).
Any clues about this device, especially the purpose?
Thanks,
J.V.
During a recent trip to a few scrap yards in the US, I bought a "Weight / CG Computer". At least I hope it is such a computer...
The strange thing about this device:
- Apparently, you have to dial in the weight in lbs and the CG in %MAC yourself.
- The only response that the computer seems to be able to give in return is on an analog scale "500---0---500".
Has anyone an idea what the scale is meant to indicate? And how this thing works? The D&O part of the CMM would be great...
A bit more info - the labels on the box show the following data:
- "Lockheed Aircraft Servicing Service Company"
- "DC-8-63F WT & BAL COMPUTER"
- "10061A100" (probably the part number)
- "002" (the serial number)
- "10/71" probably the manufacture date
The box is about 8cm wide, 6cm high, 10cm deep.
Apart from a "TEST" pushbutton, there seem to be remains of a three position switch ("OFF", "WT", "CG") on the front.
The backside has a bay for a fuse, and a connector for 19 pins (five are unused).
Any clues about this device, especially the purpose?
Thanks,
J.V.
short flights long nights
Got a picture??
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STAN (Sum Total and Nose)
We had a similar device on VC9 (Vanguard) freighters.
Oleo pressure was sensed from the nose & both main gears. Knowing the cross sectional area of the gear struts allowed STAN to calculate the weight, and by using some simple internal processing, it could calculate the C of G expressed as % MAC.
It proved invaluable on at least one occasion when pallets 1 -9 had been loaded 9 - 1 and the C of G was way out of limits.
STAN Link
That may be part of the initial set up & calibration.
Oleo pressure was sensed from the nose & both main gears. Knowing the cross sectional area of the gear struts allowed STAN to calculate the weight, and by using some simple internal processing, it could calculate the C of G expressed as % MAC.
It proved invaluable on at least one occasion when pallets 1 -9 had been loaded 9 - 1 and the C of G was way out of limits.
STAN Link
Apparently, you have to dial in the weight in lbs and the CG in %MAC yourself.
Last edited by rudderrudderrat; 23rd Nov 2010 at 14:15. Reason: link added
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PICTURE!
A picture of the "user interface" can be found here...:
http://img26.imageshack.us/img26/4497/dsc015900.jpg
Cheers, J.V.
http://img26.imageshack.us/img26/4497/dsc015900.jpg
Cheers, J.V.
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still question marks...
Hmmm... I don^t have access to the "Society of Allied Weight Engineers, Inc." paper.
And I still don^t know how this little thinks helps in day to day ops...
You dial in your best guess of weight and CG, and the device will show something on the scale.
How do you interpret the reading? With the help of a load sheet?
And then still somebody needs to check out the floor loadings, running loads, cantilevers etc.?
Regards, J.V.
And I still don^t know how this little thinks helps in day to day ops...
You dial in your best guess of weight and CG, and the device will show something on the scale.
How do you interpret the reading? With the help of a load sheet?
And then still somebody needs to check out the floor loadings, running loads, cantilevers etc.?
Regards, J.V.
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Hi JV,
Probably.
I've not seen one like this before - but I would guess that you dial in your best estimate of weight / C of G (from a load sheet) and see what the meter says. If you are spot on - then it would display centre scale. Belt and braces.
You dial in your best guess of weight and CG, and the device will show something on the scale.
I've not seen one like this before - but I would guess that you dial in your best estimate of weight / C of G (from a load sheet) and see what the meter says. If you are spot on - then it would display centre scale. Belt and braces.
Last edited by rudderrudderrat; 30th Nov 2010 at 09:42. Reason: typos
