The windows that we have in our apartment have an internal restrictor that prevents them from opening too far. However, it doesn't do anything to hold the window open against the wind, which often bangs them shut. Is anyone aware of a device or hack that I can add to keep the window in an open position?
The windows are insulated, and have heavy metal frames. They open inwards, both at the top and on the right side. Below is a photo of the restrictor, which sits inside the window frame at the bottom:
The window frame itself is quite large, approx 1.3m by 1m. The restrictor is attached via a light spring.
I don't know the brand of the windows, but the metal "plates" that you can see in the left of the image say "Maco". The window frame has no visible branding, but there is a door in the apartment in a similar style that has "Reynaers" written on the handle.
Inserting an object (e.g. rolled up cardboard) is a workaround, but is imperfect as the wind tends to move the window ever so slightly back and forth, and dislodges the cardboard after a few minutes.