John Heddles
@john-heddles
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Joined: May 14, 2016
Last seen: Jan 21, 2026
Topics: 2 / Replies: 951
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Flights over water CHTR

Standard conundrum and a regular question. If you have a small island suitable for an emergency landing, say, then you can either look 25nm ahead ...

6 years ago
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Slanted alpha charts

Good question and one which arises periodically. First, the quick answer. For trim sheets, (a) the loading lines for constant arm positio...

6 years ago
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CPL Performance - CASA Rounding Rules

This sort of thread gives me great concern as an engineer and, in this case, a very experienced practising weights engineer - my WCA (AV1), as a sidel...

6 years ago
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Ground effect

Think of ground effect as the inability of the wing/aircraft airflow downwash to descend any further than the ground surface (stands to reason - the g...

6 years ago
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Fuel system inspection

Commonsense risk management approach - Now, consider if your fuel tank is contaminated with a significant quantity of water. You drain a sa...

6 years ago
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Empty weight and loading systems

[b]Empty weight and oil[/b] This is an historical artefact. First, the definition of empty weight is in CAO 100.7 at The present definition ...

6 years ago
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Exercise Answer - RPL/PPL Study Guide Volume Two

700m sounds good. 12m obstacle requires 240m clear space to make the 5% gradient required. With the 80m to the obstacle, we need to lose 240-80=...

6 years ago
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TOW CHART QUESTION-PPL EXAM PREPS

[color=blue][i][b]I sat the exam this morning, 56 out of 56![/b][/i][/color] Well done, indeed, Meade [color=blue][i][b]I am trying to find a co...

6 years ago
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TOW CHART QUESTION-PPL EXAM PREPS

Good to see it's now under control. Stjepan - glad we have that minor point of confusion resolved, now. Meade - for this aircraft and thi...

6 years ago
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TOW CHART QUESTION-PPL EXAM PREPS

I'm giving you a hint but you are not seeing it .... 1030kg is fine but it is only half of the answer to be considered. You must ALWAYS check f...

6 years ago
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TOW CHART QUESTION-PPL EXAM PREPS

What was your climb weight limit, again ? I don't recall seeing it mentioned in your first post .....

6 years ago
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Dual ignition system

First off, what is the ignition all about ? You guessed it - providing a spark at the right time to get the combustible mixture in the chamber b...

6 years ago
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Upper deck air

Just a terminology thing. "Upper deck" refers to the supercharger/turbocharger discharge or output. Hence upper deck pressure is the discharge pre...

6 years ago
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(-+) Density Height

First point is that a sketch provides useful visual reasoning input. Second - you are almost there. Take a moment to consider the temperature devi...

6 years ago
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CPL Performance Book pg 38 ISA Temp Calculation

An additional comment to Bob's observations, if I may. If the charts have been drawn with a bit of care, then the bottom line of the density altitu...

6 years ago
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