Does anyone have a link or chart for good takeoff speeds/flaps/VS/etc? If not more in specific the 777 series and the 737!
Thank you!
Fly safe everyone!
4 Likes
Sadly, there are no real charts as takeoff VS varies due to weight of the aircraft, fuel, distance, and size. Frankly, if you are going faster, you may want a higher VS as you can climb much quicker. If you are going slow, you will want to have a lower VS.
As stated below, V speeds can be calculated through a V-Speed calculator.
4 Likes
use Simbrief for Vspeeds. I always use mid-flap (in middle between none and full) settings and some trim for take offs
4 Likes
I believe Luke’s reply is more about ‘horizontal’ speed rather than vertical speed. Ah well, I guess that’s the risk of using acronyms in your query.
Typical initial takeoff vertical speed for an airliner is somewhere between 2500 and 3500 feet per minute.
For more info, do a quick search on this forum and you’ll quickly find half a dozen threads around th same subject.
1 Like
I am sure some pilot (or pseudo-pilot…we have many in the community) could give you a detailed and complicated answer. Through the years I’ve seen many topics about this, you can probably search and find some great information, I have also talked to a few real pilots about it and here’s the logic I use for takeoff VS of airliners:
The premises
- Each aircraft has different performance (ability to climb). The MD11 and the CRJ series are notorious for being able to climb like a rocket
- Each aircraft has a range of ideal N1% while climbing (typically 85-95%… but 95% is really the upper limit and should not be crossed in most situations)
- Of the things you can control, aircraft load has biggest influence in aircraft performance
- The higher the aircraft is the harder it is to climb
- Speed limit below FL100 is 250knots
With those premises in mind:
- At takeoff I aim to maintain an N1% of 92-95%
- As I rotate I will keep my pitch up enough that I barely gain any speed…that usually means a pretty good climb rate of typically 3000 or more.
- Once the aircraft reaches 1,000AGL I will reduce pitch and engage the A/P for ALT and VS.
- I will adjust the VS so I am slowly gaining speed… I don’t want to be at 250 knots in one minute, I want to slowly gain speed and only reach 250 knots when I am close to FL100. That means my VS may be between 2,800-3,500… Again…depends heavily (no pun intended) on aircraft load and aircraft performance.
- When I retract flaps I manually bring the N1 back down for a few seconds because as you retract flaps the aircraft will reduce it’s VS and you will gain a lot of speed if you don’t do that… (or use the A/P)
- If I am very light I will sometimes pull N1 back to 85-90% - but keep in mind I am still not using the A/P to manage speed - VS is what manages my speed.
- Once I reach FL100 I reduce VS to gain speed until I reach the climbing speed, that’s typically 280-300knots, depending on the aircraft.
- Once speed is reached I turn the A/P for SPD ON
- Through the climbing process my gauge is always N1… as the A/C goes higher it will require more power to climb, so I constantly reduce the VS (usually in 500ft increments) to keep N1 below 95%.
With all of the above said, my typical VS (AGAIN…varies with aircraft and load) are something like this:
- Under FL100 - 2,500-3,500
- Until FL220 - 2,000-3,000
- Until FL280 - 1,500-2,000
- Above FL300 - 500-1,000
That’s my take on it… why not use the A/P all the way? You certainly can… but I dislike the fact that in IF the A/P will cause your N1% to max out when you increase the speed on the A/P - so I do it manually and manage the speed and rate of climb as described above.
Hope this helps…this is a very long way of saying - there are no charts!. Frankly managing your VS / SPD / N1 combo is one of the most fun parts of a flight, in my opinion. Full disclosure: I’m not pilot.
9 Likes
i believe it is 2500 vs not sure though i just pull up to a vs that seems realistic
I use 2500 VS.
However, in more complicated simulators, you use VNAV. Once you’ve set your flight plan in, etc. and everything is ready to go the FMS will calculate your vertical speed.
It varies a lot, I’ve seen vertical speed go all the way to 4000 will at times being at 1500; again, it depends.
A320/737 what i do:
2300 till FL150
2000 till FL200
1800 till FL250
1600 till FL280
1400 till CRUISE
293 knots above FL100(M.078)
250 knots below FL100
Start reducing trim around 4000
:)
You can use the IF-A VNAV, it works well, especially when combined with the In-game LNAV to program RNAV departures
Infinite Flight Assistant? If that’s the app you’re talking about it doesn’t automatically set altitude or vertical speed.
In the VNAV, you insert the altitude and speed for each fix, and it calculates and flies the V/S to cross the next fix.
Yeah. Except the FMS will calculate that all for you. I can see how that can be useful though.
This topic was automatically closed 3 days after the last reply. New replies are no longer allowed.