BA11 - Even 500 series so weak?

[NigelC]

Looks like an OAT of -10 at FL300, that's gonna be ISA+a lot (35???). No wonder she won't climb, it's too hot for her!!!

[Benedettini]

Looks like an OAT of -10 at FL300, that's gonna be ISA+a lot (35???). No wonder she won't climb, it's too hot for her!!!

Well, I don't use IVAO as weather source since its upper-air winds are totally offset, I use FSrealWXlite which gives much more realistic values even including wind data and dewpoints (what recent windcharts point out are exactly shown in simulator). And what I asked if -10 at FL300s are normal compared to -30/-40 IVAO says; I got positive reply that TAT is different than OAT

I took off at around 1858Z, and outside was 33 celcius, so you are right

[Independance]

All right, but I still have some questions.

Until now, I just had a quick look at your figures and I don`t find the relationship of flight level and fuel use. How can I use the usage per hour with different flight levels like FS 180 or FL 320? That would certainly make huges differences, wouldn`t it?

Hi

No, my figures reflect usage on highest possible level on particural route. This is a jet no matter old one, going higher burns less.

Basically if You fly on route more than 200NM, You always should climb to around 30000ft.

Climb to initial FL300/310, accelerate using climb speed to Ma 0.74, then shallow climb to FL340/FL350. If You are lighter than 44500kg, if speed is no less than Ma 0.7 and if distance permits climb to FL360/FL370.

Flying a jet on long distance at low levels is a waste of time and fuel, something never done in reality.

Best Regards
Tomasz

On FL310 on that route You just wasting Your fuel.

Best Regards
Tomasz