John Heddles
@john-heddles
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Joined: May 14, 2016
Last seen: Jan 20, 2026
Topics: 2 / Replies: 951
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Wind to use for P charts CFPA

[color=blue]If a P chart question provides only density height (e.g. DH = 4000 ft) with no temperature, Bob Tait suggests using ISA temperature for th...

8 months ago
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Wind to use for P charts CFPA

And a good question, it is. [color=blue]If actual wind / ambient wind / given W/V is provided, should we use that for both takeoff and landing char...

8 months ago
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CPL Performance. Final Test. Question 18. Day VFR from Ceduna to Forest.

[color=blue]From the CR3 manual, if the drift is more than 10ยบ then Effective TAS must be considered, otherwise it is ignored.[/color] Just a sidel...

9 months ago
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Calculating Crosswind When MORE than 90 Degrees

You're trying to overthink things a bit, I fear. Doesn't matter whether you do the calculation using the AIP tables or mathematically, using the CR...

9 months ago
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Echo burn from Mains & CofG

Be aware, though, that Bob's booklet is fine but the CASA booklet carries the day in the exam and the latter doesn't fuss about the order of fuel load...

9 months ago
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CPL Performance.

More importantly, keep in mind that the material in the exams is quite dated. Back in the day, P charts in Australia were required to have various f...

9 months ago
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ETP, runway wind components, ETAS, rounding

[color=blue]When calculating back from the ETP to point A, which ground speed do I use when finding time? Is it ground speed on or ground speed home?[...

10 months ago
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Choosing a map/ground feature for ground speed check

You're missing the point behind the book's recommendation. I suggest that there is naught wrong with your thought processes. If you are looking f...

10 months ago
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Algebraic formula for Echo Forward L

Not entirely sure that I understand what your concern is. Your formulae are OK. [color=blue]the amount to add, offload or unload[/color] Thes...

10 months ago
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10%

[color=blue]If say, I subtract 10% from 165 I am left with 148.5. 10% being 16.5.[/color] That's fine and quite correct ........ but it has absolut...

10 months ago
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Is ETAS critical in CPFA?

Will, That's a Dalton. Originally designed (in several forms) by Philip Dalton in the US in the mid-30s. After the patents expired, every ma...

10 months ago
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Is ETAS critical in CPFA?

First, if you are using an E6B (Dalton), ETAS is absolutely irrelevant as the Dalton solves the wind triangle purely graphically. This process makes...

11 months ago
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Calculating track change

Kejt It really would help out if you drew a mud map sketch. That is far easier than trying to interpret a text description of whatever ....

11 months ago
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CPL performance exam 2 Q1

I'll leave working the example unless you have continuing problems with it. I will presume that Wayne's calculations are appropriate. Some observ...

11 months ago
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12 months ago
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