Flaps uses and miss uses

[SCG_motoadve]

 

[Bremspropeller]

I like your use of vertical turning-room during that canyon-turn!

 

I think the issue with the 40° setting is that there's a brickton of downwash and you'll have an early stall due to induced flow-separation, so the wing can't effectively get you to fly slower at that setting than on the 30° setting. You'll have a lot of drag nonetheless, which helps in the steepness of the approach and thus results in shorter landing-distances over obstacles (and possibly shorter rolling-distances due to the added drag).

 

I think a split flap has some advantages:

- it's simpler

- it doesn't (at greater deflection angles) create too much downwash on the upper side of the wing, so you don't run into AoA restrictions quite as fast as on plain flaps

 

The plain flap is better at creating additional lift at smaller angles, though.