I've always been curious why many aircraft that were designed in the 1930s, just when aviation was transitioning from open cockpits to enclosed, had windscreens with a forward slant.
I've never seen it explained anywhere so I thought I'd try the collective wisdom of this learned group
I have never seen an example of a forward slanting windscreen on any open cockpit aircraft prior to this period.
The only sense it makes to me is maybe the designers thought it would provide more headroom for visibility? Perhaps pilots were accustomed to being able to look over the side and wouldn't be able to do so in an enclosed cockpit? But then again, the windscreens weren't slanted to the sides, just the front in all the examples I've seen.
But this phase only lasted a while and soon all designs adopted the more sensible (IMHO) rearward slant we've seen ever since.
Any idea what the thinking was behind backwards windscreens?