Zeke From Hong Kong, joined Dec 2006, 10113 posts, RR: 76
Reply 3, posted (8 years 4 months 3 weeks 4 days 20 hours ago) and read 8739 times:
Quoting SKY1 (Reply 2): Then, a Fuel Density of 6.7 lb / USG is an average/medium density on an average temperature?
SG changes with the type of fuel and temp, 6.7 lb / USG works out to an SG of 0.8 kg/l, anywhere between 0.77 and 0.83 can be seen when you purchase fuel.
In asia a SG around 0.78-0.79 kg/l is normal, so with a capacity of 241,619l on the 748i, and SG of 0.78 would give a fuel load of 188462 kg, with a SG of 0.8 it would be 193295 kg, which means a range reduction of 4833 kg, or around 20-30 minutes, or around 200-250 nm less range.
We are addicted to our thoughts. We cannot change anything if we cannot change our thinking – Santosh Kalwar
SunriseValley From Canada, joined Jul 2004, 5572 posts, RR: 5
Reply 5, posted (8 years 4 months 3 weeks 1 day 23 hours ago) and read 8542 times:
Quoting SCAT15F (Reply 4): find it strange that maximum structural payload is listed as 295,000 lb for the airport compatibility brochure when everywhere else it is listed as 308,000lb.
Uum... if you are referring to the freighter it shows in the January 2007 version of the airport compatibility brochure as 295400lb. The passenger version shows as 168300lb. No doubt there were other values for earlier iterations of the 747-8.