Pilots are flying planes 14 mph slower

[350DRIVER]

Not too good......


http://www.usatoday.com/money/biztravel/2004-08-22-united_x.htm

"First-class galleys keep one can of whipped cream on hand instead of two. That flight attendant's suggestion could save $40,000 annually".

Any bets on what happens after Sept.30th??.


3 5 0

 

[AA717driver]

"First-class galleys keep one can of whipped cream on hand instead of two.
3 5 0

Wow! I guess those UAL guys are just going to have to go easy on the whipped cream on layovers. TC

 

[FN FAL]

Wow! I guess those UAL guys are just going to have to go easy on the whipped cream on layovers. TC

[homer simpson]....mmmmmm, nitrous oxide.[/homer simpson]

 

[350DRIVER]

Wow! I guess those UAL guys are just going to have to go easy on the whipped cream on layovers. TC

I bet they will be forced into making a stop at a local 711 on way to hotel.

D)

3 5 0

 

[Vortilon]

Surely you all missed the big problem at UAL: The pilots.

I am suprised the article didn't say: those darn pilots are flying slower because they are paid hourly.

 

[urflyingme?!]

14 mph? Are these guys for real? Does it even make a difference?

 

[Jmmccutc]

14 mph? Are these guys for real? Does it even make a difference?

yes it does, i mean hey you should have learned this in school some where

N = Hours flown

example you fly at 1mph (for simplicity sake) and i'm flying at 15mph, me - you = 14mph, SOOOOOO...(listen up students)...if Jmmccutc and you start at exactly the same time how much farther than you will he be at the end of one hour...??????...(now if you guys can't figure this out when my special ed. little brother was able to do it in about 30 seconds we got problems...)

N*(difference in speed) = how far behind my ass you all are after one hour...


i guess what i'm trying to make a point of is that after one hours i'll be 14 miles a head, 28 after 2, and 42miles after 3 hours...it starts to add up, and if you don't believe me that 14mph is a big difference, get on the highway and go 60mph then have a buddy blow past at 74~75mph...

 

[Nova]

I think you missed his point. Does 14 mph really affect the fuel usage over a flight? Yes, just as with your car example. You might blow past me going 14 mph faster than my 60 mph but I can go alot further with my more efficient speed (ie higher mpg).

 

[lancioair]

Instructor Writer

I'm the owner of a new web site: www.runningrotors.com
Airpalne and Helicopter Pilot.
The site talks mainly about helicopters but I,m going to have a all page with planes material. I'm looking for instructors as collaborators and writers. I accept any article or training material. pictures, suggestions, ideas. Look it up.

www.RunningRotors.com

 

[Jedi_Cheese]

lancioair, you guessed the wrong button. Try the "new thread" one.

Also, remember that at the speeds that airliners move, parasite drag is higher than the induced drag. Drag is a linear scale (remember the L/D charts and L/D max?). So you would be decreasing parasite drag more than you would be increasing induced drag and thus you wouldn't need as much thrust (and thus your fuel savings).

 

[LAXSaabdude]

yes it does, i mean hey you should have learned this in school some where

N = Hours flown

example you fly at 1mph (for simplicity sake) and i'm flying at 15mph, me - you = 14mph, SOOOOOO...(listen up students)...if Jmmccutc and you start at exactly the same time how much farther than you will he be at the end of one hour...??????...(now if you guys can't figure this out when my special ed. little brother was able to do it in about 30 seconds we got problems...)

N*(difference in speed) = how far behind my ass you all are after one hour...


i guess what i'm trying to make a point of is that after one hours i'll be 14 miles a head, 28 after 2, and 42miles after 3 hours...it starts to add up, and if you don't believe me that 14mph is a big difference, get on the highway and go 60mph then have a buddy blow past at 74~75mph...

An airliner flies at about 8 statute miles per minute. On a 5 hour transcon, an airliner flying 14 MPH slower will be 70 miles behind. It will take just under 9 minutes to cover that ground.

So in other words, proportionately, with a 14 mph difference on a 5 hour, 530MPH flight, no one is "blowing by" anyone else in the same manner as 60MPH vs 74MPH.

530MPH - 14MPH = 2.6% speed difference.

74MPH - 14MPH = 19% speed difference.

LAXSaabdude.

 

[Busflyer]

That 9 minutes equates to almost 150 gallons of Jet A

150 gallons X (# united flights per day)= lots of Jet A!!

And these are calculations for a small airliner.

 

[DoinTime]

United used to (and I'm sure they still do) use cost factoring. Big computers crunch complex formulas to come up with the optimal speed at which their airliners will fly. Among the factors are fuel costs, aircraft utilization/market timing, crew costs, maintenance costs, ect.

Now that crew salaries have come down and fuel costs have gone up the speeds that they will fly will also slow down to more optimal fuel efficiency speeds. This is nothing new in the industry. If United can save $1.00/per flight hour, a seemingly insignificant dollar amount, it will result in huge yearly savings as the number of flight hours flown every year at United is staggering. Its no different from taking a can of whipped cream off of the airplane.

 

[Nova]

That 9 minutes equates to almost 150 gallons of Jet A

150 gallons X (# united flights per day)= lots of Jet A!!

And these are calculations for a small airliner.

That would hold true if the fuel burn at .76 was the same as .80 but it's not. Slower speed equals less PPH so it is possible to take a 9 minute hit but still burn less gas.

 

[lancioair]

lots of nice information

just give it a look guys and give me suggestions.
leave a message in the guestbook.
www.runningrotors.com

 

[Dubya]

Ahaaaaaaaa!

An airliner flies at about 8 statute miles per minute. On a 5 hour transcon, an airliner flying 14 MPH slower will be 70 miles behind. It will take just under 9 minutes to cover that ground.

So in other words, proportionately, with a 14 mph difference on a 5 hour, 530MPH flight, no one is "blowing by" anyone else in the same manner as 60MPH vs 74MPH.

530MPH - 14MPH = 2.6% speed difference.

74MPH - 14MPH = 19% speed difference.

LAXSaabdude.

So THIS is why everyone told me as a kid that pilots needed superior math skills!
It isn't for the flying...it's for posting on flightinfo!!

The search for the grail is over! I did need to pay attention in math after all!

W

 

[flydoc1979]

Welcome to RunningRotors...
</FONT>Were the rotors start turning !!!

Minor issue here and that is that you should proofread everything. Otherwise, I think you got the beginnings of a cool website.

 

[five-alive]

That would hold true if the fuel burn at .76 was the same as .80 but it's not. Slower speed equals less PPH so it is possible to take a 9 minute hit but still burn less gas.

Exactly. It doesnt take a little more thrust to go a little faster, it takes a LOT of thrust to go a LITTLE faster. The drag curve goes up astronomically as airspeed increases. There is a big difference in drag at 415 knots versus 400 knots, thus much lower fuel burn to go a little slower

Now if you slow down too much and drag the flight out then hourly costs (maint, crew) start to creep up too, so there is optimum in between.