I have no way of measuring the steepest slop I mow but I'll take a pic of it tomorrow.
I'm betting my Social Security check you have a way. If you have a 2' level or a piece of lumber 1,2,3,4 or 10 ft. long or any length similar and any spirit level you can do it. All that's needed is rise over run just as if we were measuring roof pitch/slope.
I'm reading this post with great interest. Found this video: https://www.youtube.com/watch?v=fX2RYPPZEb0
Watch it to the end...some scary stuff!!! I'm speechless, do not know what to tell you...sorry.
I watched the video noticed the grass was heavy probably wet. I could mow that with my mower in dry conditions.I went today and measured the steepest slope I mow. It starts at 20deg and increases to 42. I can mow all of it starting at the top of the hill mowing across the face going at a downwards angle. Its pushing the limits I know. Not all mowers will handle the same. With my added weights on the rear of my mowers gives it more traction.
Yes. I start at the steepest part cutting across the face at a angel to the bottom. If I start at the less and go to the steeper I can't turn without getting into trouble.