Fuel Density
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Fuel Density
Hello,
How do you calculate Fuel Density ?
Max fuel for a given aircraft is per exemple 50000LT.
How much fuel can you take if density is .80 ??
Many thx
How do you calculate Fuel Density ?
Max fuel for a given aircraft is per exemple 50000LT.
How much fuel can you take if density is .80 ??
Many thx
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That was a bit mean Sans Anoraque (however totally true)
Density is involved in the relation between weight and volume.
1 kg of water = 1litre of water
so 50,000l of water weighs 50,000kg.
However fuel is less dense than water and weighs less
1 litre of fuel = 0.8kg
(This varies according to temp and pressure but 0.8 is a good benchmark.)
I think what you wanted to ask was how much does 50,000 litres of fuel with a density of 0.8 weigh = 40,000kg
(Weight = density x volume)
or alternately 50,000 kg of fuel = 62,500 litres.
(Volume = weight divided by density)
The fuel tanks in you r question are of a fixed volume so will alway contain 50,000litres of fuel (or water or treacle if you wished). Hence Sans Anoraque's remark
Clear as mud?
Density is involved in the relation between weight and volume.
1 kg of water = 1litre of water
so 50,000l of water weighs 50,000kg.
However fuel is less dense than water and weighs less
1 litre of fuel = 0.8kg
(This varies according to temp and pressure but 0.8 is a good benchmark.)
I think what you wanted to ask was how much does 50,000 litres of fuel with a density of 0.8 weigh = 40,000kg
(Weight = density x volume)
or alternately 50,000 kg of fuel = 62,500 litres.
(Volume = weight divided by density)
The fuel tanks in you r question are of a fixed volume so will alway contain 50,000litres of fuel (or water or treacle if you wished). Hence Sans Anoraque's remark
Clear as mud?
http://www.tc.gc.ca/CivilAviation/pu.../3-1.htm#3-5-2
Let us say it is 15 Deg C. Jet A is 1.85 Lbs/ litre.
50,000 Litres would wiegh 50000X1.85 = 92,500 Lbs
Let us say it is 15 Deg C. Jet A is 1.85 Lbs/ litre.
50,000 Litres would wiegh 50000X1.85 = 92,500 Lbs
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on finding the volume or wieght of fuel on big uplifts it is essential that you get the specific density of the fuel, this is found when the fuel is tested at the fuel farm, the sg will be measured and the temperature taken of the fuel sample. For eg your 50000 L with a sg of .785 the fuel would weigh 39250 kg, with a sg of .825 your 50000 L would now weigh 41250 kg. When fuelling to possibly over 100 000 kg in different climates there will be a vast difference in litres uplited.
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Oh my God!
With a mix of Metric and Imperial units like that, it's no wonder that aeroplanes run out of fuel from time to time.
Regards,
Old Smokey
Let us say it is 15 Deg C. Jet A is 1.85 Lbs/ litre.
50,000 Litres would wiegh 50000X1.85 = 92,500 Lbs
50,000 Litres would wiegh 50000X1.85 = 92,500 Lbs
Regards,
Old Smokey
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With a mix of Metric and Imperial units like that, it's no wonder that aeroplanes run out of fuel from time to time.
Just be glad your ASI isn't in furlongs per fortnight.
Speaking of units: the units of imbalance in many rotor-balancing machines are (I am not making this up!) - ahem - Gram-inches.
Last edited by barit1; 3rd Dec 2005 at 21:47.
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Rationalisation
