This is explained to me that it comes from different refineries, and we have started on a new batch. The fuel here comes from different refineries by ship, and sometimes the SG will do a step change from say 0.799 to 0.804 overnight. But I expect it costs money to alter the SG and is not worth their effort. In KUL it is around 0.785.Ĭan the fuel company control the SG in any way? Obviously (to me) it is in their interest to lower the SG, because then they will sell more litres of fuel to the airlines. Here in ARN the fuel is now at around 0.803 sg (kg/lt). So from an airline point of view, if the SG is higher, then we need to buy less to achieve the same amount of fuel on board. When it is on board the aircraft it is measured in Kg. We buy fuel from the fuel company in litres. I was trying to explain to him the importance of SG, and how Qantas used high SG fuel to fly a B744 from LHR to SYD non stop.Īnyway it got me thinking. I was refuelling a B744 yesterday and as it was a quiet day I was chatting to the Dispenser driver about the specific gravity of the fuel.
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