- #1

lowwwien

- 8

- 1

## Homework Statement

Hi to all,

the Task I struggle with, is the range calculation from an Airbus A320 with the Breguet Range Equation which is defined as:

## Homework Equations

**R = (cl/cd) * (V/(g*SFC)) * ln(w0/w1)**

with

- V = velocity
- g = gravity
- SFC = specific fuel consumption
- w0 = start weight
- w1 = end weight

**V = 230 m/s**,

**Fuel of 10000 kg**,

**w0 = 68000 kg**,

**w1 = 58000 kg**and

**L/D = 15**

The SFC for the engine (CFM-56-5A1) of an Airbus A320-200 has an

**SFC of 0,596 lb/(lbf*hr)**which is converted into kg/(N*s) with the divsion of 3600 to an

**SFC = 0,000165555555 kg/(N*s)**

## The Attempt at a Solution

__This would lead to the following numbers in the breguet equation:__

R = (15) * (230 / (9,80665*0,000165555555)) * 0,15906 = 338031,844 meters = 338 Kilometers

Did I bring in a mistake anywhere in my calculation? I think with one decimal more the result would be very realistic with 3380 km range for 10000kg fuel.

I'm very uncertain with the unit change for the SFC. Could this be the Problem?

Thank you very much in advance.

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