1 hour ago, Stearmandriver said:

But what altitude are you climbing to, compared to optimum and max?  It's not about the conditions you're climbing in, but what altitude you're trying to reach, reference your weight and speed.

It’s depending by Simbrif usually between 340to 360

2 hours ago, threegreen said:

Thrust around 100% during climb is normal. If thrust is 95-ish% during cruise and you're maintaining speed you're probably going very fast or flying close to max altitude, maybe a combination of that or even very high headwinds. If you put in a high CI you will still be fast in cruise even if you're flying at ECON cruise for that CI.

Need more info; screenshots of the relevant FMC pages and displays would be helpful to spot if something is off in the setup.

What info you need? I will send you.

7 hours ago, Lidan said:

I couldn’t publish there. I tried

They require a full name in your signature to ensure that you've actually purchased the aircraft. It's kind of a controversial subject in the flight sim community, but it is what it is. I don't really have an issue with it, but I understand some people not wanting their full name out on an internet forum. To each their own.

12 hours ago, Lidan said:

What info you need? I will send you.

PERF INIT, CLB and CRZ pages and perhaps the payload page to see what the actual payload is as well as PFD and engine display.

What is a "normal" cost index?  I've been going for around 35

5 minutes ago, Langeveldt said:

What is a "normal" cost index?  I've been going for around 35

That's about normal, although it's probably already on the high side since most airlines seem to go for lower ones like 10 these days as long as on schedule, with about 50, 80 or higher if running late. But it's variable per flight and not a constant value and even changes throughout the flight to account for possible delays.

For a big US airline 10 is the default orientation for the 737 with 80 if running late and 120 is max, but again, the CI used varies a lot.

13 hours ago, Bdub22 said:

They require a full name in your signature to ensure that you've actually purchased the aircraft. It's kind of a controversial subject in the flight sim community, but it is what it is. I don't really have an issue with it, but I understand some people not wanting their full name out on an internet forum. To each their own.

I don't like it for one simple reason. I once had some word not allowed call me at work regarding a Facebook post that one of my employees made. It was on his own time, and his post had nothing at all to do with his work. The complainer noticed that he had our company name in his profile and somehow determined where exactly he worked (we have many locations). He was quite incensed that I told him that I didn't give a dang about my employee's personal opinions expressed on his own time. The person then threatened to go to HR since I wasn't going to do anything about it. 

I realized that complete anonymity on the internet is not possible, but the less information the nut jobs have to work with, the better.    

I think I solve the problem if someone can tell me at flight level 370 88%-90% with 59.7 ZFW 

I think I solve the problem if someone can tell me at flight level 370 88%-90% with 59.7 ZFW 

On 7/30/2023 at 1:43 PM, somiller said:

Not just you - I had the same response...lol

Oh, I think I get it?

High engine thrust setting at cruise - are you sure the gear, flaps and or spoilers aren't deployed? Thrust (using autothrottle and VNAV or FLT LVL Change) will always be high during climb. If you are using a really high cost index, or set a high cruise mach setting you will see high thrust. I think I've only ever seen around 90% in cruise, and it's usually more like 80% - 85%. Thrust required to cruise at a given speed will also vary depending on altitude.

I think I solve the problem if  flight level 370 88%-90% with 59.7 ZFW 12 tons of fuel 

18 minutes ago, Lidan said:

 

I think I solve the problem if  flight level 370 88%-90% with 59.7 ZFW 12 tons of fuel 

What's different now?

I see no mention of temp dev from ISA in this discussion...that might explain some things.

23 hours ago, Lidan said:

It’s depending by Simbrif usually between 340to 360

Simbrief is irrelevant here.  The question is, how does the altitude you're climbing to compare with what your FMC says is optimum and Max altitude for current conditions?

In reality when we get our final climb clearance to cruise, we set it in the MCP and then verify it in 4 places: the MCP, pressurization panel, FMC cruise altitude, AND by checking it against optimum and verifying we're good for it.

If you're blindly trying to climb to an altitude simbrief gave you without knowing if you can get there, you can obviously run into performance issues.

20 hours ago, threegreen said:

What's different now?

I think my spoilers was open

19 hours ago, Bob Scott said:

I see no mention of temp dev from ISA in this discussion...that might explain some things.

I’m changing me the temp according to simbrif