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17/11/2019 8:22 pm
Hi Guys
Question on errata published on the website..
"19.08.2019
Page 130. Answer to Question No 4. The GS out was used instead of the GS home. The last line of the calculation should have read "178 ÷ 130 = 82 minutes". The corrrect answer is (b)"
The question asked for the distance and time taken from ETP to Bravo, so we should be using GS out @ 190 and not GS home @ 130. Should the original answer (d - 56min) in the textbook not stand?
18/11/2019 12:37 am
Hi Shaun,
I believe you're correct...
TAS = 160
A->B = 300nm
A->B = 30kt TW
GSout = 160+30 = 190
GShome = 160-30=130
ETP (CP) = Distance x GShome / 2TAS
= 300 x 130/(2(160))
= 122nm
ETP to Bravo distance = 300 - 122 = 178nm
ETP to Bravo time = 178nm @ 190kts = 56 min
