where did you get the 86 gallon figure from Jas. pretty sure it is 80?
not sure of the actual answer Pete. The thing with the bob Tait practice exams is that they are like the CASA ones and dont tell you the correct answer. They just tell you got question x wrong and the syllabus reference relevant to it (syllabus item 2.8.6.3 calculating the maximum fuel load). Very frustrating as if you know the correct answer you can usually work out where you went wrong. Anyway I am prety sure there is no "trick" I missed, just not accurate enough in my plotting of points as I got 54kg variance from Pete