Hello guys simbreif generally use flex take of to calculate its speeds but please is there a way. I change it from flex to toga because on infinite flight I don’t think a flex take of can be done
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There’s unfortunately no way to “Force TOGA” in Simbrief’s Performance Tools.
Both the A380 and 737 MAX have detailed guides here on the forum which include N1% values for different weight brackets along with how that N1% value may differ depending on a few factors:
There is also this website which gives an approximate N1 value - just enter in the aircraft and weight %. You can use a combination of the website and the N1 adjustment tables in the guides above to come up with a takeoff N1 value.
There is. Simply disable the option for FLEX/ATM and it will automatically give you the speeds and distances calculated with TO/GA.
26K TO will give an N1 of approximately 100.3% here.
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So this means I’ve to use full throttle power ? Or 90% thrust is also considered toga ?
I don’t understand this chart
IF model is overpowered than irl so it will be around 92% (my estimation). You shouldn’t use toga unless for ultra long hauls you roll too quickly which can affect the realism if you’re interested. You can use flaps 2 for toga so it can increase drag.
Yes when I’m over 55% weight I should use toga right. ?but below I’ve to use a lower thrust setting ??
Well 55% is not a ultra long flight so flex but you can use toga but at flaps 2 so it will increase drag (not recommended) which might help for a more gentle roll. Toga is used for mainly flights near TOW or above 80% payload with flaps 1+ config.
Ok so 70% load isn’t toga ?
Not in most cases unless the runway is not enough or bad weather.
So can simbreif determine all this ?
Yes. Simbrief takes runway length and conditions into account when determining what thrust setting to use.
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TO/GA isn’t one specific thrust setting. The actual maximum selectable takeoff power will depend on external factors (as in the table I sent above) and on the actual engine of the aircraft itself.
You won’t get anywhere close to 100% N1 at TO/GA with some aircraft; whereas with others the maximum attainable N1% on takeoff can exceed 110%. Again, however, the specific values depend on environmental factors.
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Explain further please Nk’s I’m lost and confused how do I know the thrust % to use for toga on particular flight !
I linked a website earlier on - again linked here which gives you an approximate N1 value for an aircraft and weight config. We don’t have TOGA/FLEX settings in Infinite Flight so I would just ignore that. Focus on the actual N1 value.
Ok so which means the performance tools on simbreif shouldn’t be used for take of ? On infinite flight
You can use Simbrief’s takeoff performance tool for things like V-Speeds, etc…
Ok so what I’m asking is should I always set it to toga or I should leave it as flex because when it’s on flex it calculates v speeds for the flex take of
just ignore TOGA/FLEX - use the website I linked plus the charts in the guides for adjusting the N1 value based on weather conditions. that’s good enough 99% of the time.
I just wouldn’t recommend following the speeds in that website (especially for the 777s) and the thrust settings for the A380 especially - they are way too high.