I am an instructor for several ARC teams and we really need to reduce our variability in max altitude. As I am learning more details about altimeters the recommended hole size is 0.02" or about 0.5mm. We had been just punching 4 holes with an awl equally spaced around the tube about 3-5mm in size.
I am thinking of trying a sharp needle to make the four small holes of 0.5mm. Any other suggestions? Thanks.
I am thinking of trying a sharp needle to make the four small holes of 0.5mm. Any other suggestions? Thanks.