Then I move the blade to 45 degrees, checking with my angle gauge, and set the 45-degree bevel stop. This allows me to quickly position the blade at 90 and 45 degrees, the two most common angles ...

Smith told us although it's not impossible for an airplane to hit a 90-degree angle while taking off, the the maximum steep climbs seen during airshows may reach 40 or 50 degrees momentarily: ...