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PPL Video Lectures (10 Jul 2020)

PPL Video Lectures covering Aerodynamics, General Knowledge, Performance, Meteorology And Navigation are now available through our website see front page for details.

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Where to cargo

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Marko created the topic: Where to cargo

Hi all Does anyone have any general rule for where to place cargo in echo e.g. fill wing locker first Then rear then nose.I understand that it is dependent on where in the envelope you initially sit But just thinking about questions that Ask for zfw With limited information but give a cargo weight cheers
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  • John.Heddles
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John.Heddles replied the topic: Where to cargo

I understand that it is dependent on where in the envelope you initially sit

You've summed it up. Not really practicable for the exams but, in practice, one either would use graphic overlays (this can be used to figure an answer very quickly) or run the equivalent on a PC. One of the advantages of a trimsheet (Alpha, for instance) is that you can do much the same albeit not quite as quickly.

Engineering specialist in aircraft performance and weight control.
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Marko replied the topic: Where to cargo

Hi John just trying to find a quicker way to Save time in the exam for example if the question gives empty weight and passangers And wants you to load four boxes each waying in 35 kg Would it be a safe bet to load echo wing compartments and then do the graphics to find out how much in nose or rear Or does this create more trouble than it’s worth
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John.Heddles replied the topic: Where to cargo

for example if the question gives empty weight and passengers and wants you to load four boxes each waying in 35 kg Would it be a safe bet to load echo wing compartments and then do the graphics to find out how much in nose or rear Or does this create more trouble than it’s worth

Depends.

If you aren't given any CG information, then you are not worried about balance and you can load however the whim takes you. The only concerns are with the compartment and limit weights.

If you have to run the balance calculations as well, it all depends on where the CG starts off and the amounts with which you have to play. My preference would be to plot the empty data to give you a feel for where you might have to go, take an initial guess and run that addition and plot the result, and so on until you get all the load done. The advantage of this approach is that you will see if you have a problem as you go and can change tack to suit the specific situation.

With this sort of loading system, you really don't have much in the way of shortcut options, I'm afraid, unless you have some transparent load overlays, which you don't have for the exam.

It follows that the more practice exercises you do the better your feel for what is what with this particular aircraft.

Engineering specialist in aircraft performance and weight control.
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Marko replied the topic: Where to cargo

Thanks John. Will do
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