Navigation Problem!!!
Thread Starter
Joined: Jun 2008
Posts: 1
Likes: 0
From: Venezuela
Navigation Problem!!!
Hi there, I have a problem that I could't solve 
and apear in the license test of my Country 
anyone could help me to solve thanks
Calculate TAS, GS, MH, MT, TATēC WCA, Flying to 33.000 ft. with follow data IAS/CAS=240KTS, OAT=-46ēC,W/V=070/60KTS, VAR=-29ēE, TH=10ē
THANKS A LOT
P.D. I Found the following
TAS= 2% CAS x ALTITUDE/1000 + CAS = 4.8*37+240= 417KTS
and apear in the license test of my Country anyone could help me to solve thanksCalculate TAS, GS, MH, MT, TATēC WCA, Flying to 33.000 ft. with follow data IAS/CAS=240KTS, OAT=-46ēC,W/V=070/60KTS, VAR=-29ēE, TH=10ē
THANKS A LOT
P.D. I Found the following
TAS= 2% CAS x ALTITUDE/1000 + CAS = 4.8*37+240= 417KTS
Joined: Nov 2003
Posts: 548
Likes: 0
From: Scotland
Its a CRP5 job! I don't have mine to hand so Ill try do it in my head...
TAS would be easy to work out using the ALT/Temp window. Getting TAS by looking at the number above the 240 on the inner scale. Its below 300kts so no need to worry about compressibility
MH - apply variation, variation east magnetic least.
GS and drift - you would work out on the reverse side using the wind data and your TAS.
MT - apply variation and drift.
WCA - is difference between MH and MT (or TH and TT).
I may have missed something out, Its been a good year since i've even looked at one of these. Even forgot half of the mnemonics. I'm sure some one will correct me if i've said something in the wrong order.
TAS would be easy to work out using the ALT/Temp window. Getting TAS by looking at the number above the 240 on the inner scale. Its below 300kts so no need to worry about compressibility
MH - apply variation, variation east magnetic least.
GS and drift - you would work out on the reverse side using the wind data and your TAS.
MT - apply variation and drift.
WCA - is difference between MH and MT (or TH and TT).
I may have missed something out, Its been a good year since i've even looked at one of these. Even forgot half of the mnemonics. I'm sure some one will correct me if i've said something in the wrong order.
Last edited by wbryce; 5th June 2008 at 17:45.
