I'm a student pilot, the question I am trying to answer is
What would be the ground roll and total distance to clear a 50ft obstacle given an elevation of 5,000ft, altimeter 29.52, and a temperature of 25° Celsius, winds calm.
Disclaimer: I'm going to double check with my CFI, obviously, you should too if you are unsure.
So I understand how the chart works, I'm just unclear about the "Elevation 5,000ft. Altimeter at 29.52".
My inclination is to assume that the meaning is sea level pressure is 29.52, and therefore we should adjust our input for "PRESS ALT FT" to be the altitude that reflects that average pressure, which would be 500 feet.
We round up for safety, so assume PRESS ALT=1000' and TEMP=30° Celsius, we would have a ground roll of
890' and a takeoff distance of
Another question: Where do I find the official documentation for converting barometric pressure into the altitude that has that average pressure?