A-320 Single Engine Taxi out Myth Busters
08-24-2015, 05:08 AM
#111
Gets Weekends Off
Joined APC: Dec 2005
Posts: 8,914
**In 20 flights utilizing SE taxi, a total of 143 minutes of SE taxi was recorded.( average SE taxi out was 7.15 minutes!) **
**Total SE taxi fuel saved 2,280 lbs.**
**APU burn during SE taxi: 715 lbs (5 lbs/min)**
**Net SE taxi fuel saved: 1,565 lbs ( 226.8 gallons)**
Can you please give an example how you made the forecast for the taxi fuel saved?
Thanks
Yashvin
**Total SE taxi fuel saved 2,280 lbs.**
**APU burn during SE taxi: 715 lbs (5 lbs/min)**
**Net SE taxi fuel saved: 1,565 lbs ( 226.8 gallons)**
Can you please give an example how you made the forecast for the taxi fuel saved?
Thanks
Yashvin
08-24-2015, 06:48 AM
#114
Gets Weekends Off
Joined APC: Apr 2008
Position: 767A
Posts: 791
On the 75/76 it's easier to taxi on one than two. With two you have to keep braking. And it gets you moving out of the ramp sooner. In the summer I leave the APU running because while it's ok to run 2 packs on 1 engine, they don't put out cold air at idle. The only reason to not SE taxi is a ramp restriction or a short taxi.
08-24-2015, 09:54 AM
#115
Da Hudge
Joined APC: Oct 2006
Position: Poodle Whisperer
Posts: 17,473
08-24-2015, 11:54 AM
#116
Gets Weekends Off
Joined APC: Jul 2006
Posts: 2,918
SE taxiing... All depends what airline pilot group you are talking to.
Delta? Vigorous defender of it. Thank profit sharing and a relatively good pilot-management relationship.
AA, UA? Never. AA, we have no profit sharing and our relationship with management... Suffice it to say that our ceo has mentioned we don't affect the bottom line. I couldn't agree more!
SE taxiing is just on more thing that provides a distraction on the ground. No thanks.
Delta? Vigorous defender of it. Thank profit sharing and a relatively good pilot-management relationship.
AA, UA? Never. AA, we have no profit sharing and our relationship with management... Suffice it to say that our ceo has mentioned we don't affect the bottom line. I couldn't agree more!
SE taxiing is just on more thing that provides a distraction on the ground. No thanks.
08-24-2015, 02:08 PM
#119
Gets Weekends Off
Joined APC: Jan 2008
Position: 319/320/321...whatever it takes.
Posts: 492
reddog,
Is there any data to support the actual savings of fuel at the heavier weights? Is there a published report where two planes at identical weights travel the same taxi route and show the difference between fuel used? What I see in ATL during my commutes is a lot of high power settings during breakaway, acceleration and during uphill taxi segments. Then there's the high power settings during crossbleed start. I've never seen an actual side by side comparison.
Carl
Is there any data to support the actual savings of fuel at the heavier weights? Is there a published report where two planes at identical weights travel the same taxi route and show the difference between fuel used? What I see in ATL during my commutes is a lot of high power settings during breakaway, acceleration and during uphill taxi segments. Then there's the high power settings during crossbleed start. I've never seen an actual side by side comparison.
Carl
Holy necro post Batman!
Last edited by Left Handed; 08-24-2015 at 02:40 PM.
08-24-2015, 04:31 PM
#120
Gets Weekends Off
Joined APC: Dec 2005
Posts: 8,914
Gotta like how some people make a 2nd engine start process on an A320 sound like it is a busy thing. Please. Push one button, turn a switch to the right, and flick up a switch. DONE. Startup, generator, everything automatic. It's hardly a busy time like it is in a RJ or a 737.
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