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Aerodynamics of the 737-300

Contributed by Nick Duros

Saturday, 21 January 2006

Page 6 of 10

11. The following graphs depict the Thrust Required and the Drag Curves.

This chart shows the thrust required for various airspeeds at sea level, on a standard day. At sea level, the engines produce 20,000 pounds of thrust on a standard day.

The jet engines used on the Boeing 737-300 are made by CFM. The 300 series uses the CFM 56-3.

Total, Parasite, and Induced Drag

This graph shows the different types of drag and their effect on flight at various airspeeds. The low point on the graph is where L/D MAX occurs. Although the graph does not depict it the low airspeed and AOA will create more parasite drag than shown.

Airspeed	Power Required	Dp=1/2Dmin(V2/V1)^2	Di=1/2Dmin(V1/V2)^2	Dt=Dp+Di
125	13180.4	1469.1	11711.3	13180.4
150	10250.5	2116.5	8134	10250.5
200	8337.35	3764.05	4573.3	8337.35
210	8300	4150	4150	8300
250	8810.45	5880.55	2929.9	8810.45
300	10499.5	8466	2033.5	10499.5
350	13022.7	11528.7	1494	13022.7
400	16201.6	15056.2	1145.4	16201.6

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