Are slats shy ?

[JtD]

Originally Posted by Crumpp

The designs for the radiator flaps of the F series were tested as well during this investigation. In fact the aircraft, for those test's the aircraft was fitted with an F series cowling (intake), wheel well covers, and the various radiator flap designs being considered.

That makes a little bit of sense, as the chart explicitly states "Spreizklappen innen" - "slotted flaps inwards". Which probably means they only changed the part around the radiator.

Originally Posted by Crumpp

What is the effect of a camber increase on a lift polar??

It shifts the whole polar to the right! That means it LOWERS our Angle of Attack!! You cannot have the same Angle of Attack flaps up as you do flaps down....

I'd think they move to the left, i.e. proving more lift for the same AoA...but I don't see how the trailing edge flaps suddenly became the issue.

BTW you can see the data point Mtt plotted for the plain airfoil and for the slats on the polar. The Bf-109 did not have full length LE slats so it did not get a dramatic CLmax increase.

That's interesting and impossible to know from just looking at the chart - these dots carry no designation and could be anything, in particular as the same dots cannot be distinguished in the flaps extended polars. So thanks for telling.