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## Fuel as ballast

• Posts: 1929

### bobtait created the topic: Fuel as ballast

This post came from Andrew as an e-mail and has been posted in the forums for the benefit of other students.

Just have a quick query regarding one of your questions in the CPL performance book. Exercise 5.10 on page 5.40 regarding using fuel as a ballast. The question i want to ask about is the second question. My worked answer was exactly the same as you had in the worked answers, however its the limitation of the main fuel tanks in the echo that i'm wondering about.

If we have to add 68kg of ballast fuel, to the 224 kg of minimum fuel at T/O, this equals 292 kg. However, the max load of the main fuel tanks in Echo is 272kg (100 Gals x 2.72= 272kg)? So we have an extra 20kg of fuel that we can't put anywhere without changing the load once again? Am i missing something here. Thanks for your time.