LE Flaps / Slats Position 747-400

[atc4usaf]

Pretty much just looking for the deflections on these settings. From research, I see which groups are activated with different flap lever settings. I can't seem to find the angles of the L/E devices at the different settings.

Any help would be greatly appreciated!

[Dan Winterland]

Don't remember angles being quoted. They're either extended or retracted according to the manual. When Flaps 1 is selected, the inboard and midspan groups extend, the outboard on Flaps 5 selection. The Inboards are Krugers, the midspan and outboards flexible panels which distort to a aerofoil shape when extended.

[spannersatKL]

And are called Variable Camber Leading Edge Flaps...not Slats....

[NSEU]

Variable Camber (can't remember where I found this picture)



Beautiful curves)

The (inboard) Krugers have no airgap, are flat panel, but have a folding snout (like the Variable cambers).



Only two positions... In and Out (as specified in the previous post)

[atc4usaf]

Thanks guys for the replies. I did see that they are variable LE flaps in my research... just wrote slats. I was looking for the actual degrees of deflection these extend to for the various flap lever settings. I wasn't sure if they are controlled by systems that take into consideration flight conditions or if they were pre-set for each flap lever position.

Thanks for the answers!

[Intruder]

There is only one extended deflection setting, and I don't think there is any "angle" attributed to it, or what the reference lines would be.

[SMOC]

As said the LE of all 747s is either extended or retracted, there is no mid position.

The 748 does however have gapped kruegers unlike the previous versions of 747.

[NSEU]

Note that the term "variable" purely refers to the way the LE Flap surface changes as the flaps extend/retract. i.e. from dead flat to curved. There are no variable (intermediate) positions between stowed and extended.

Rgds
NSEU

[TyroPicard]

The 748 does however have gapped kruegers .

And I always thought the 748 only had de-icing boots....

[atc4usaf]

Thanks again everyone. I'm just trying to model it in a flight simulator project and it asks for angles. But knowing they have only one extended position really helps.