Welcome to the CPL Performance question and answer forum. Please feel free to post your questions but more importantly also suggest answers for your forum colleagues. Bob himself or one of the other tutors will get to your question as soon as we can.
You are correct. The answer given in the test is correct (220kg) but the working on page 259 is completely crazy. Don't know where that came from! Anyway, it's fixed now. The flight is ZFW limited and the cargo is 220kg. Thanks for your feedback. It is much appreciated.
I have another question regarding ballast fuel. For example, page 174 question 3. I noticed that you have added 30Kg worth of sandbags in the nose locker even though we can add another 90kg until we reach MZFW. My question is even though we have only added 30Kg to the nose locker (limited by permissible load) is it also possible to add some weight to the rear compartment, Wing compartments and nose compartment before we start adding ballast fuel? Or is it recommended to just add whatever weight we can to one compartment and leave the rest to fuel ballast before it gets messy? Are there any restrictions to doing this?
Because the problem is that the aircraft is loaded beyond the aft limit, the only place to put hard ballast would be in the nose compartment or in Row 1. All of the other compartments are further back than the aft limit of 2680mm, so any weight placed in Row 2, Row 3, Wings or Rear would make the situation worse.
The only place hard ballast will do any good is the nose compartment since Row 1 already has two occupants.
I feel I am confused with what happens to ETP if there is a wind.
On page 109, it says “if A wind exists, the ETP will move upwind from half way. My understanding by this is it doesn’t matter if it is a head or tail wind.
Then the answer on page 130 to question 9 says an ETP always moves upwind from halfway...so an increase in HW causes it to move toward the destination end I.e further away.
Then question 10 answer on page 250 says if a wind exists the ETP moves into wind from its half way nil wind position
Then the second paragraph says a tailwind causes ETP to move closer to the departure Aerodrome while a HW will cause it to move further away.
These all seem to contradict with what’s written on page 109 and parts of the other paragraph.