the a/c will have tendency to go back its normal position/attitude in roll after disturbance.
So it means once you are rolled down in one side, you will be rolled back in normal.
2. whats swept wing
a wing sloping backward. like 777W 31 degrees
3. So Hows the swept wing increase lateral stability?
Figure 5.8(b) shows how the component of the velocity (RAF) perpendicular to the leading edge is increased on the down-going main plane (the wing being disturbed and rolled down).
It is this component of velocity that produces the increased lift and together with the increase in effective wing span restores the aircraft to a wings level position.
Could you tell me more about high Keel effect? I read some materials tells that high ring with pendulum effect, which is also known as high keel effect.
I am not sure if low wing has less keel effect, 😃😃😃
@Eric WINGWING
Hi Wing Wing,
1. With Keel effect, its normally applied into High Wing a/c for lateral stability.
2. In low wing a/c with ”lateral stability“, i indeed haven’t heard to roll back the a/c by using “Keel effect“, but “Dihedral Effect”.
Cheers. Please correct me if i make something wrong!
Dihedral Effect on Low wing a/c
”Keel Effect” on High Wing A/C
@Ma Lok chun jeff
hey Jeff.
Please correct me if i make something wrong!
Hope it helps.
1. What’s lateral stability?
the a/c will have tendency to go back its normal position/attitude in roll after disturbance.
So it means once you are rolled down in one side, you will be rolled back in normal.
2. whats swept wing
a wing sloping backward. like 777W 31 degrees
3. So Hows the swept wing increase lateral stability?
Figure 5.8(b) shows how the component of the velocity (RAF) perpendicular to the leading edge is increased on the down-going main plane (the wing being disturbed and rolled down).
It is this component of velocity that produces the increased lift and together with the increase in effective wing span restores the aircraft to a wings level position.
Summary:
Roll Down due disturbance
> LDE of Swept Wing perpendicular to RAF
> more RAF on down-going wing
> more lift on down-going wing
> roll back
Could you tell me more about high Keel effect? I read some materials tells that high ring with pendulum effect, which is also known as high keel effect.
I am not sure if low wing has less keel effect, 😃😃😃
how does sweep back contribute to lateral stability ar?