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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Center of Gravity With Lift

Some observations. Initial pilot PoF training is a bit unfortunate in that it tends to look at this area too simplistically. Generally, for a co...

10 years ago
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Ground effect

Some observations .. (a) the lift curve slope changes and, IGE, one sees more lift than OGE. In addition the stall speed is reduced somewhat IGE. ...

10 years ago
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Undershoot with best glide speed

Indeed. (a) headwind will see a better glide distance with an increased speed. (b) tailwind will see a slight improvement in glide distance with a...

10 years ago
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Undershoot with best glide speed

With my eyes rolled up .. (c) is the option they are after. However .. "none of the above" is the better answer .. none of the options is likely to...

10 years ago
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P chart

Chao, Let's play some more with these charts, shall we ? [b][i]You can have a look at other two pictures ..[/i][/b] First off, a generic comm...

10 years ago
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SCUBA Diving

I don't know of any civil aviation rules, [i]per se[/i], although I have no doubt that the military will have plenty. There are a few papers on the F...

10 years ago
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Chord Ratio

50+ years in the aero game and the term has never been seen. Either - (a) the question was a typo, or (b) the informants' memories were deficie...

10 years ago
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VFR Flight Instruments

I suspect the answer sought is (d) clock .. for which a pilot may carry a watch in lieu. MELs and like documents can muddy the answer for simplistic ...

10 years ago
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Fuel calculation

I don't have the reference to look at but the calculation appears straightforward - (in minutes), (a) (85+38) will be flight fuel for two planned ...

10 years ago
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P chart

Chao, Thanks for that .. we are, indeed, dealing with the old DCA (antecedent of CASA) P-chart presentation, as I had guessed from your post. The...

10 years ago
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P chart

I don't have Bob's books so I can only speak generically unless you post a picture of the chart(s) of interest. [b][i]How are those chart made? [/i...

10 years ago
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First officer assertive or supportive ?

The LHS certainly wants support. For the question, as stated, (a) is what they would be looking for. However, I guess the correct answer was lef...

10 years ago
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Instructor Rating ASL exam - what's the deal?

Not my guidance .. I just happened to see your thread and recognised it as being the same as this one.

10 years ago
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Instructor Rating ASL exam - what's the deal?

The answer you got on PPRuNe probably is the key ...

10 years ago
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Weight to Shift on a C172

A bit hard to be precise without the numbers and envelope. The 172's forward limit, like the majority of light aircraft, has a constant CG at lo...

10 years ago
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