- #1

yecko

Gold Member

- 277

- 8

## Homework Statement

Given Thrust-specific fuel consumption c

_{T}=0.5279lb/lbf*h... as other units in the question are in SI unit, I have to convert it to (N/s)/N first...

## Homework Equations

1 lbf = 4.448 N

1 lbm = 0.4536 kg

Thrust-specific fuel consumption = weight of fuel burned per unit time (N/s) per unit thrust (N)

## The Attempt at a Solution

c

_{T}=0.5279lb/lbf*h= (0.5279lb/lbf*h)* (4.448 N/lbf) / (0.4536 kg/lbm) / (3600s/h) = 1.49e-5 kgN

^{-1}s

^{-1}

which the unit of my answer stands for mass per force per time (kg/Ns) instead of force per time per force(N/Ns)...

where in the unit conversion have i done wrong??? thank you very much!