Jump to content

question concerning fuel calculations


Guest bisinchi

Recommended Posts

Guest bisinchi
Posted

Hi,I wanted to fly from Paris to Rio de Janeiro, that is a 5042Nm flights, so I went through the fuel planning bit of the documentation my weight was 485,000 lbs, so I planned for 212000+10000 of fuel for the trip, on top of that I added 25000lbs of reserve and 10000 lbs in case. Well, in total I entered 259000 lbs of fuel.I entered the flight into the FMC and the fuel prediction when I activated the route gave me a remaining fuel of 17000 lbs, which I translated as 236000 lbs of fuel needed for the flight, which was much more than the predicted 222000 lbs originally planned, what would cause such a difference?I didn't enter any winds prior to the FMC giving me these figures.Regards,Fran

Posted

Because of all the contingency fuel you added (which is OK) your planned landing weight will be much higher than the 475,000 lbs. The table you used for fuel planning (page 2-7) is only valid for landing weight of 475,000 - in your case you have to make correction (as descrobed on page 2-7) and you should be ok. Follow the description in the manual how you plan your landing weight but once you know this number you have to make final adjustments as described on page 2-7.Michael J.http://www.precisionmanuals.com/images/for...argo_hauler.gifhttp://sales.hifisim.com/pub-download/asv6-banner-beta.jpg

Guest bisinchi
Posted

Thanks for the answer, that might actually answer the question!!Cheers,Fran

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
×
×
  • Create New...