Quote:
Originally Posted by IvanK
The E3B in the RAF museum. Radflaps Open Pin up 
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The angle of which that picture is taken is nearly in line of the upper wing surface, so you can see the rod in is lower end position. The rods never sunk so much into the surface, that you would not see it (which makes perfect sense, as a indicator that can't be seen isn't good. ) This can be seen on the other pics showing open flaps, too.
Please all download the manual from the starting post, browse to page 47 and have alook at the picture marked "Abb. 60" (Abb. meaning Abbildung, meaning illustration") there the rod is shown, and you can clearly see that it just was a rod attached to the radiator flap. No gearing/whatsoever that reversed it's movement compared to the movement of the flap.
Its also written in the text just above the abb 60:
"Die Anzeigestange (60c) durch die Tragfläche führen und an den beiden Winkeln (60d) der Kühlerklappen (60a) anlenken."
"Push the indicator Rod (60c) through the airfoil and connect it with the brackets (60d) to the cowl flaps (60a)"
Also, "versenkter stab: klappe auf" on page 3 isn't badly chosen words. It says "open water cooler if needed (with crank located to the right of the seat); indicator on top of airfoil (sunken rod: flap open)". No german uses the word "Auf" for the meaning of up if the context is something you can open or close. Especially if "up" isnt "open".