If an instrument departure procedure requires a minimum climb rate of 210 feet per NM, what is the required rate of climb for a ground speed of 140 knots?

If an instrument departure procedure requires a minimum climb rate of 210 feet per NM, what is the required rate of climb for a ground speed of 140 knots?

• A. 390 feet per minute.
• B. 490 feet per minute.
• C. 590 feet per minute.
• D. 690 feet per minute.

Answer: (B)

To determine the required rate of climb when the minimum climb rate is specified as 210 feet per nautical mile and the aircraft is traveling at a ground speed of 140 knots, it’s important to first calculate the equivalent climb rate in feet per minute. 1. Convert ground speed from knots to nautical miles per minute: - Since 1 knot equals 1 nautical mile per hour, a ground speed of 140 knots translates to 140 nautical miles per hour. - To find the distance covered in one minute, divide by 60 (since there are 60 minutes in an hour): \( 140 \, \text{NM/h} ÷ 60 = \frac{140}{60} \, \text{NM/min} ≈ 2.33 \, \text{NM/min}\). 2. Now, apply the required climb rate: - The departure procedure requires a climb of 210 feet for each nautical mile. Therefore, if the aircraft is climbing at that rate, for every nautical mile covered in 1 minute, it should be climbing \( 210 \, \text{ft/NM} × 2.33 \, \text{NM/min} \): \( 210

To determine the required rate of climb when the minimum climb rate is specified as 210 feet per nautical mile and the aircraft is traveling at a ground speed of 140 knots, it’s important to first calculate the equivalent climb rate in feet per minute.

1. Convert ground speed from knots to nautical miles per minute:

• Since 1 knot equals 1 nautical mile per hour, a ground speed of 140 knots translates to 140 nautical miles per hour.

• To find the distance covered in one minute, divide by 60 (since there are 60 minutes in an hour):

( 140 , \text{NM/h} ÷ 60 = \frac{140}{60} , \text{NM/min} ≈ 2.33 , \text{NM/min}).

2. Now, apply the required climb rate:

• The departure procedure requires a climb of 210 feet for each nautical mile. Therefore, if the aircraft is climbing at that rate, for every nautical mile covered in 1 minute, it should be climbing ( 210 , \text{ft/NM} × 2.33 , \text{NM/min} ):

( 210