Hi all is anyone able topics me some advice on converting a rate of descent into a percentage? Any advice would be very appreciated.
J
.. and your speed is ? (presuming that you are after a descent gradient)
Engineering specialist in aircraft performance and weight control.
Yeah that is correct, just unsure on how to get the % figure I will attach a image of the question.
J
[attachment:1]image.jpg[/attachment]
Perhaps you might retry on the picture link ? Makes more sense to use a specific example to explain .. generic algebra doesn't help unless you are familiar with that sort of stuff.
Engineering specialist in aircraft performance and weight control.
The simple 'rule-of-thumb' formula is
RATE OF CLIMB (IN FEET PER MINUTE) ÷ GROUND SPEED (IN KNOTS).
The answer will be a percentage climb gradient. For example, a rate of climb of 750 feet per minute and a ground speed of 100 knots gives a climb gradient of 750 ÷ 100 = 7.5%.
The full derivation of the formula is found on page 74 of my Performance book (page 4.4 of the old book).
