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Rounding guide

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User 5517
(@user5517)
Estimable Member Customer
Joined: 13 hours ago
Posts: 109
Topic starter  

Hey Guys,

I've recently started studying performance and I'm getting answers within 1 or 2 kg of the answers in the book due to rounding. I'm certain that I'm doing the questions correctly and i have been saving all rounding until the end for accuracy.

Someone on the PPE website said there was a rounding guide in the front of the PERF book for all formulas? I can't find it anywhere?! Is this because it's in the latest version of the book? I have the 2017 edition.

Thanks



   
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(@john-heddles)
Famed Member Customer
Joined: 10 years ago
Posts: 955
 

Suggest two tacks you might take -

(a) run some forum searches on the question as there are numerous threads on this general subject

(b) post one of your typical question solutions and we can comment on what you are doing, specifically, and whether that might be good, bad, or indifferent.


Engineering specialist in aircraft performance and weight control.


   
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User 3940
(@user3940)
Honorable Member Customer
Joined: 13 hours ago
Posts: 572
 

G'day Jase

This is what you are referring to https://www.bobtait.com.au/images/Files/ETP%20PNR%20download%20.pdf

Cheers



   
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User 5517
(@user5517)
Estimable Member Customer
Joined: 13 hours ago
Posts: 109
Topic starter  

Hi Stewart,

Yep that's the one! Thanks very much!

Cheers



   
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User 3940
(@user3940)
Honorable Member Customer
Joined: 13 hours ago
Posts: 572
 

Also please check out https://www.bobtait.com.au/updates-and-errata/22-cpl-performance-errata for all the updates you will notice that there is an quite a significant amount. My advice would be to source a newer copy.

Cheers



   
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