Refer to figure.

Calculate the aircraft height gain after 2.5 NM, given:

Mass: 4 200 lbs

PA: 4 000 ft

OAT: +30°C

Wind: 20 kt headwind

*(All engines operating)*

Refer to figure.

*FIND THE RATE OF CLIMB (GRAPH):*

(1) Enter the graph at the left bottom scale at a temperature of 30ºC. Continue vertically up until you intersect a pressure altitude of 4 000 ft.

(2) From this point, continue horizontally to the right to the first section of the graph - which corresponds to the "__2 Engines__" Rate of Climb - track to the __4200 lb__ line.

(3) Proceed downwards and read a value of approximately __ 1750 ft/min__.

*CONVERT IAS TO TAS (FLIGHT COMPUTER):*

(1) On the "True Airspeed" window, align the pressure altitude (4000 ft) with the temperature (+30ºC)

(2) On the inner scale look for 92 kt IAS and read the corresponding value of approx. **101 kt TAS** (outer scale).

*CALCULATE THE GROUND SPEED:*

Ground Speed = TAS - Headwind

Ground Speed = 101 kt - 20 kt = **81 kt**

*CALCULATE TIME TO COVER 2.5 NM (GS 81 KT):*

Time = distance / speed

Time = 2.5 NM / (81 kt / 60 min)

Time = **1.85 min**

__CALCULATE HEIGHT GAIN__*(Using rate of climb obtained on the first step)*:

Height gain = Time (min) x Rate of Climb (ft/min)

Height gain = 1.85 min x 1750 ft/min = **3238 ft**

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