B-17G Cockpit Auxiliary Window F-105 Thunderchief Here is an interesting video

Here is an interesting video describing how the K-13 functioned

This instrument appeared on the P-3 Flight Status Panel in a section called Wind Leading Edge Skin Temp

The crewman or co-pilot operated a handgrip to adjust the aim of the externally mounted searchlight

and fighters P-38 Lightning and P-61 Black Widow

See photo of a similar antenna mounted to the fuselage of a B-24 bomber

B-17G Cockpit Auxiliary Window F-105 Thunderchief Here is an interesting videoThis is a front left auxiliary cockpit window installed in some G model B 17's, although they could be retrofitted to other models. They could be opened inward to allow a pilot to de ice his main windscreen or, in the worst case, to see forward if the main screen was iced over. The internally facing, botton mounted handle unlocks when flipped up, and then the opened window would be affixed to the internal cockpit ceiling with the snap fit strap.