Mental maths - tips, tricks and shortcuts
2.5% of 120 is 3 kts.
So that's about 300 fpm...
So that's about 300 fpm...
IE at Vyse of 106 in nil wind (PA31-350) and a MA 2.5% climb gradient requires around 265 fpm. (Yeah right hahaha good one)
Join Date: Apr 2008
Location: Australia
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3 deg slope just use half ground speed in feet per minute, 120 kts= 600ft per min, 180 kts = 900 ft per min etc, makes approaches easy. Also know your wizz wheel. After 13000 hrs still carry one and use it regularly. Great for diversion calculations, something we do a lot at the RFDS.