Originally Posted by
Elbeinlaw
1. Are those Canadian degrees? Aren't they 10% bigger than American degrees? (Sorry sorry sorry.)
2. So if 45% is (according to this diagram) 12/12m, which is 100%, then I can I extrapolate arithmetically to 6/12 would be 50% and 22.5 degrees? Which is important at the lesser angles, the ones we typically encounter riding, i.e. 2/24 = 15% more or less or 9.2 degrees? Or is there some trigonometric factor that varies it from the strictly arithmatic?
No, you cannot directly extrapolate. As the charts show 6/12 is 26.5
° which is larger than the 22.5° you've calculated.
As
shelbyfv noted there is no easy way you can do this in your head. Best to use one of the calculators provided. OR, don't worry about it and just climb.