Quick question for the more enlightened.
In calculating PNR or CP do you need to calculate effective TAS unless CAS is specifically given in the question or is it always calculated at 140t/100kt depending on AEO or OEI?
Cheers
ATPL (H) Flight Planning
- Evil Twin
- 3rd Dan
- Posts: 696
- Joined: Mar 2007
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- Gold Wings
- Posts: 113
- Joined: Jan 2014
Re: ATPL (H) Flight Planning
Hi ET,
I'm not an enlightened one, and when I did my ATPLs in good 'ole JAR land, I'm sure I had to work out PNRs, and CPs using G/S. However, I would often be asked to convert from IAS, EAS, CAS, TAS etc plus Mach No, from compressibility, altitude and OAT, which is cock all use to flying helicopters but a hoop to jump through anyway. But ground speed would be the key?
Cheers, Saucepan.
I'm not an enlightened one, and when I did my ATPLs in good 'ole JAR land, I'm sure I had to work out PNRs, and CPs using G/S. However, I would often be asked to convert from IAS, EAS, CAS, TAS etc plus Mach No, from compressibility, altitude and OAT, which is cock all use to flying helicopters but a hoop to jump through anyway. But ground speed would be the key?
Cheers, Saucepan.
- Evil Twin
- 3rd Dan
- Posts: 696
- Joined: Mar 2007
Re: ATPL (H) Flight Planning
Thanks for your reply Saucepan, yep got that one. I should've said, when calculating G/S from TAS. I'm trying to establish if I should be using the S76 handbook TAS of 140KT unless CAS is given in the question content, or, calculating TAS given temp and pressure. I'm leaning towards handbook TAS but think I fell into a CASA trap when looking in too much detail for gotcha's. I'd love to meet a CASA question writer in a pub
Thanks again for your reply
ET
Thanks again for your reply
ET
-
- Gold Wings
- Posts: 113
- Joined: Jan 2014
Re: ATPL (H) Flight Planning
No worries ET,
Sorry, I couldn't be more helpful. My performance and planning was done on a Boeing 727.....who operates those things now? And that was only 6 years ago! Good luck with finding a CASA question writer in a PUB!
Cheers Saucepan.
Sorry, I couldn't be more helpful. My performance and planning was done on a Boeing 727.....who operates those things now? And that was only 6 years ago! Good luck with finding a CASA question writer in a PUB!
Cheers Saucepan.
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