Visit Captain Sim web site  
  Welcome, Guest. Please Login or Register

 

Page Index Toggle Pages: 1 Send TopicPrint
Cost index calculation (Read 1678 times)
Alex T
Senior Member
*
Offline



Posts: 415
Location: Boston, MA
Joined: Jun 21st, 2015
Gender: Male
Cost index calculation
Aug 24th, 2020 at 12:44am
Print Post  
Surely something is wrong here. At my company we use a CI of 15 on the 757/767 if we're on-time, 350 if late. I was using 15 and my ECON speed seemed just too high. The OFP predicted one of .787 and the plane was giving me .80

To test I entered a bunch of cost indexes to see if it'd react realistically, it did not. When I entered a lower cost index of 0, it gave me a higher cruise speed!  Shocked then it wouldn't even give a higher speed until I threw in 5000.

Also, not sure why with the CI of 0 the ECON speed changes from MACH to IAS?!

And why is the ACT ECON CRZ turning into ACT LIM SPD CRZ with any higher cost index than 35?

I understand what the maximum entries for the 767 cost index, but the results are different than what they were before the last few hotfixes.


https://imgur.com/uID9DPp
https://imgur.com/lHsXYLo
https://imgur.com/IrZKTN6
  
Back to top
YouTube  
IP Logged
 
Angel of Attack
Full Member
*
Offline



Posts: 249
Joined: Dec 15th, 2019
Re: Cost index calculation
Reply #1 - Sep 2nd, 2020 at 5:10am
Print Post  
Just for information, CI vs speed (and weight, alt, etc...) chart is in "FMC Supplementray Performace Data for the Model (767 etc..)" doc. which is NOT in a standard flight manual, FCOM and FPPM only provide data for .80 and LCR.
I see some other add-ons specify list they have "full CI system simulated"
  
Back to top
 
IP Logged
 
Alex T
Senior Member
*
Offline



Posts: 415
Location: Boston, MA
Joined: Jun 21st, 2015
Gender: Male
Re: Cost index calculation
Reply #2 - Sep 2nd, 2020 at 8:53pm
Print Post  
Angel of Attack wrote on Sep 2nd, 2020 at 5:10am:
Just for information, CI vs speed (and weight, alt, etc...) chart is in "FMC Supplementray Performace Data for the Model (767 etc..)" doc. which is NOT in a standard flight manual, FCOM and FPPM only provide data for .80 and LCR.
I see some other add-ons specify list they have "full CI system simulated"


So nowhere to get this data? I swear it wasn't an issue before. I just tested again (v1.0) and the climb speed looked normal 0.784, and cruise was still 0.80  Sad
  
Back to top
YouTube  
IP Logged
 
Angel of Attack
Full Member
*
Offline



Posts: 249
Joined: Dec 15th, 2019
Re: Cost index calculation
Reply #3 - Sep 25th, 2020 at 6:49am
Print Post  
Well, I have noticed the same on 757, CLB and DES speed are following CI change, but CRZ is LOCK to .800, that's odd, doesn't seems they lack data, but rather a bug prevent the CRZ mode to work proprelly
  
Back to top
 
IP Logged
 
Alex T
Senior Member
*
Offline



Posts: 415
Location: Boston, MA
Joined: Jun 21st, 2015
Gender: Male
Re: Cost index calculation
Reply #4 - Oct 6th, 2020 at 9:18pm
Print Post  
CS, any word on this? Again, I'm having a CI of 70, then putting in 15 and the plane is accelerating?!

  

2020-10-6_17-15-12-9.jpg ( 894 KB | 114 Downloads )
2020-10-6_17-15-12-9.jpg
Back to top
YouTube  
IP Logged
 
Alex T
Senior Member
*
Offline



Posts: 415
Location: Boston, MA
Joined: Jun 21st, 2015
Gender: Male
Re: Cost index calculation
Reply #5 - Jan 26th, 2021 at 4:13pm
Print Post  
So no answer from the devs? Not even a "well look into it"? Or the usual answers? It's been a quiet few months here.  Huh Sad
  
Back to top
YouTube  
IP Logged
 
Captain Sim
CS Team
*
Offline



Posts: 4213
Joined: Nov 7th, 2005
Re: Cost index calculation
Reply #6 - Jan 26th, 2021 at 6:55pm
Print Post  
We'll check that and a few other things on the Base Pack by the -300F Expansion release.
  
Back to top
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint
 
  « Board Index ‹ Board  ^Top