Q 11. Same as above.

FPT 185M Wind 200T / 185M. The answer is assuming a Tailwind.??

I am looking at the same issue. Can someone please help to verify this?
Thank you so much!

These questions were changed some time ago in the book and I forgot to change the download. Here is the new version. Hope it hasn't caused you too much anguish. Sorry about that.

[attachment=1683]Screen Shot 2020-05-12 at 4.10.17 pm.png[/attachment]

The wind in Question 8 was changed to 070°T with a variation of 10°E.

The download has been updated as well

I am using the ebook version. As per above, I see that these issues have been updated. But looking at Q7 in the current ebook version, the answer is (a), 78nm, 49mins. I calculated 102.2nm, 49mins.

Which is the correct answer?

That's a typo in the answer it should be (d) I'll amend that answer

Here is the current book version

[attachment=1696]Screen Shot 2020-05-29 at 7.52.25 am.png[/attachment]

Hi Bob, Stuart,

Question 8.
Any particular reason for not subtracting Taxi fuel 3gal from [172-17.25-17] ?
The difference in results is not big but I am interested in principles, i.e. when should I ignore taxi and when not.

For example I understand the wording when the question says "fuel at takeoff" means no taxi, but in this case fuel is observed 103nm from departure.

Thanks

In this case, you have assessed the fuel on board over the NDB is 95 gallons and you have burnt 15.8 gallons since departure. So the fuel on board at take-off is 110.8 gallons. (I'm not sure where you got 172 from). So, if you base your safe endurance calculation on 110.8 gallons. That's at take-off, so there is no need to consider the taxi fuel because the PNR safe endurance calculation is based on the trip fuel available at take-off.

Thanks Bob,
yes it was typo, should be 110.8.

>PNR safe endurance calculation is
>based on the trip fuel available at
> take-off.

I am comparing question 8 with question 12, but that's because we have 145gal at start-up.

Thanks again!

Hi Bob and Stuart,

I’ve had a look in the ERRATA and it appears this one hasn’t been picked up yet.

Q11 on page 126 vs the answer on page 135 is conflicting.

Thanks for that we've amended the question to reflect the answer

[attachment=1994]Capture.PNG[/attachment]

Cheers

You have recalculated the fuel available at the 103nm point. You knew how much fuel you had when you dipped the tanks and you know how long the engines have been running. You would have accounted for the taxi fuel when you did the recalculation. It's quite legal to recalculate the fuel in flight because you are basing it on actual observation of the flight up to that point.

Bob