Originally Posted by
Inop2
On the 175. Engine idle fuel burn is 500 lbs/hour and the APU burns 250/hour. In other words, 12.5 lbs a min.
Someone mentioned earlier....mainline guys look at you with surprise if asked about company pressure on fuel. Never have to arm wrestle with the dispatcher for more. Plus, 2 engine start at the gate is common practice. An Airbus or 737 burns 3x as much fuel AT IDLE than the 175 does in cruise.
Roughly 1600 lbs at idle (800/side) on the Airbus give or take. 737 is similar.
You only burn 500 lbs an hour total at cruise? I don't think that is anywhere near correct.
Our avg taxi time in DFW is around 12 minutes.
With the APU running (400 lbs/hr) and one engine running (800 lbs/hr) you're at 1200 lbs/hr. Not accounting for increased fuel flow to SE taxi on the operating engine.
In most scenarios it's a wash or close to it.