When taking off, it occured to me that the aircraft is already producing substantial amounts of lift before reaching the EFB-calculated VR-speed, regardless of aircraft load level. Is this to be expected?

@berkkp

 

Normally not, however there are several factors to take into consideration: Weight distribution, Center of gravity, winds and trims. There is so much more but the main ones are the ones mentioned unless I am forgetting something. Try setting trims to -0.4 or more to see if this will allow you to reach your VR,V1 speed. 

Cheers

15 minutes ago, Marcocessna84 said:

@berkkp

 

Normally not, however there are several factors to take into consideration: Weight distribution, Center of gravity, winds and trims. There is so much more but the main ones are the ones mentioned unless I am forgetting something. Try setting trims to -0.4 or more to see if this will allow you to reach your VR,V1 speed. 

Cheers

It's not that it rotates/has a nose up tendency. The wings produce so much lift, that even with the nose forced down, the main wheels will lift off.

I'm also facing this problem! It's very weird to reach V1 and the nose starts to go up already!

Have to agree, there’s definitely something up with the lift. Even with a flap 15/0 takeoff at high weights rotating through about 5° the aircraft is already off the ground. I flew the A300 in xplane extensively and it didn’t behave anything like this. 

Edited January 1, 20242 yr by nopixar