how fast is fast?

Buckeye757 · December 27th, 2005, 21:48

A few days ago I was on a flight from ATL to PHL on a 757 when the capt. came over the PA and said we were criusing at 585 mph (he had to dumb it down for us). I've been flying for years now and for some reason when he said 585, that just didn't sound too right. Is this a normal cruising speed for a 757?

GrantHubbell · December 27th, 2005, 21:50

You must of had a nice tail wind!

BobDDuck · December 27th, 2005, 21:55

He most likely gave you the ground speed. Although that is a pretty good speed considering you were going west bound. Somebody who flies the 757 (Don?) could give you the exact mach number that they normally cruise at but I am betting it is between .75 and .8. You would then have to look at what altitude you were cruising at and translate that into a airspeed. That said, I have seen low 500 ground speeds before in the CRJ going east bound and we cruise at .74 mach so it is very much possible that the number is correct.

MDPilot · December 27th, 2005, 22:11

Normal econ cruise on the 757 is .79-.80 mach. At typical altitudes, about 460-480 KTAS, so with a little tail wind, 510 or so knots groundspeed is very possible. ( I saw 610 the other day LAX-ATL)

wheelsup · December 27th, 2005, 22:36

Quote:

Originally Posted by BobDDuck

I have seen low 500 ground speeds before in the CRJ

My buddy sent me a camera phone picture of 6-0-0 knots GS taken off the MFD in level flight. That's hauling butt for a -200

!

~wheelsup

Doug Taylor · December 28th, 2005, 00:25

He might have also put it in MPH for shock value too.

Buckeye757 · December 28th, 2005, 02:04

Yeah, that's what i was thinking Doug . As soon as I heard that I thought to myself "that's awefully close to the sound barrier."

MDPilot · December 28th, 2005, 08:21

TAS would have to be close to mach, not the ground speed. If you are traveling .8 mach, the tail wind can be 200 knots and ground speed can be 700 (KTAS + tailwind), you are still only doing .8 mach

BobDDuck · December 28th, 2005, 09:51

Quote:

Originally Posted by wheelsup

My buddy sent me a camera phone picture of 6-0-0 knots GS taken off the MFD in level flight. That's hauling butt for a -200

!

~wheelsup

What? He had his cell phone on in flight? Shame on him.

True story... I'm normally pretty good about turning my phone off, but for what ever reason I forgot to the other day. We are heading from SDF to Washington and lucky us we have a Fed in the jump seat. Well, everything is going as well as could be expected (he dinged me for not setting the standby altimeter to 29.92 above 18,000) when all of the sudden as we are decending into DC, my cell phone goes off. Oops! Of course the irony is that it was crew scheduling, and about 30 seconds after I didn't answer it we got an ACARS message for me to call them.

600 is pretty good. I think I saw 585 once heading east bound. That and it was the captain's last leg and he was trying to make a flight home. Barber Pole anyone?

B767Driver · December 28th, 2005, 10:01

Quote:

Originally Posted by Buckeye757

Yeah, that's what i was thinking Doug . As soon as I heard that I thought to myself "that's awefully close to the sound barrier."

In the upper FL's TAS for .78 mach is about 475kts. I think the speed of sound at ISA temp is around 600 kts. So use TAS...not groundspeed. Still a good margin under it.

mtsu_av8er · December 28th, 2005, 12:55

Quote:

Originally Posted by BobDDuck

What? He had his cell phone on in flight? Shame on him.

Most camera phones have an "Airplane Mode", that allows everything to work except for the telephone!!

BobDDuck · December 28th, 2005, 13:14

Quote:

Originally Posted by mtsu_av8er

Most camera phones have an "Airplane Mode", that allows everything to work except for the telephone!!

True, and my company's policy is that they need to be turned off even if they have an airplane mode. No reason for it... just the policy they have.

mtsu_av8er · December 28th, 2005, 14:56

Quote:

Originally Posted by BobDDuck

True, and my company's policy is that they need to be turned off even if they have an airplane mode. No reason for it... just the policy they have.

Wow - really? That's called silly where I come from!!

I haven't encountered that silliness yet - just a matter of time, I'm sure!

SteveC · December 28th, 2005, 15:01

Quote:

Originally Posted by mtsu_av8er

Wow - really? That's called silly where I come from!!

I haven't encountered that silliness yet - just a matter of time, I'm sure!

Direct to you from the Ministry of Silly Walks.

.

jonnyb · December 28th, 2005, 15:04

Just wait 'till NJA_CAPT gets ahold of this thread. Here we go.....

Maximillian_Jenius · December 28th, 2005, 15:05

Quote:

Originally Posted by SteveC

Direct to you from the Ministry of Silly Walks.

.

Hey...the guy in the hat and black suit is from the Freemason skit joke! Secret handshakes...lol.

-Matthew

Maximillian_Jenius · December 28th, 2005, 15:07

Quote:

Originally Posted by jonnyb

Just wait 'till NJA_CAPT gets ahold of this thread. Here we go.....

Yea he is a huge braggard isn't he! My jet is faster then yours both in a climb and at cruise. It can fly in the upper flight levels while your puking around at FL350.

Sound bout right?

-Matthew

wheelsup · December 28th, 2005, 15:52

Quote:

Originally Posted by Maximillian_Jenius

Yea he is a huge braggard isn't he! My jet is faster then yours both in a climb and at cruise. It can fly in the upper flight levels while your puking around at FL350.

Sound bout right?

-Matthew

Reminds me of that story where a 152 asks ATC for a groundspeed check. "90 knots" says ATC. Then a baron checks in, asking for a GS check. Followed by an airliner of some sort. After that, a USAF Fighter asks for a GS check, besting everyone.

A few seconds later an SR-71 asks ATC for a GS check. "1850 knots" (or something like that) says ATC. There weren't any more GS requests

.

JDE · December 28th, 2005, 16:25

NJA_Capt will definately be able to top this, but I still thought it was cool!

FlyChicaga · December 28th, 2005, 16:30

I don't know what's so exciting about an airplane that can get to FL510. It's how LOW you can go that makes you a real pilot.

Buckeye757 · December 28th, 2005, 16:41

Exactly what type of aircraft does NJA_Capt fly?

JDE · December 28th, 2005, 16:54

Quote:

Originally Posted by FlyChicaga

I don't know what's so exciting about an airplane that can get to FL510. It's how LOW you can go that makes you a real pilot.

600 kts at 600 feet...that'd be a freakin rush!

I still think I'm meant to be an airshow performer...but if I could find somewhere to do aerobatic training nearby...I couldn't afford it!

Quote:

Exactly what type of aircraft does NJA_Capt fly?

Citation X

JaceTheAce · December 28th, 2005, 17:15

Quote:

Originally Posted by Buckeye757

A few days ago I was on a flight from ATL to PHL on a 757 when the capt. came over the PA and said we were criusing at 585 mph (he had to dumb it down for us). I've been flying for years now and for some reason when he said 585, that just didn't sound too right. Is this a normal cruising speed for a 757?

I wish people would just say KNOTS!!! That way people will actually look it up on how to convert themselves in their head for the future.

jonnyb · December 28th, 2005, 17:18

Quote:

Originally Posted by FlyChicaga

I don't know what's so exciting about an airplane that can get to FL510. It's how LOW you can go that makes you a real pilot.

Besides, speed is only fun when you're down low.

Philip · December 28th, 2005, 17:25

I rarely see the lears at work bust 500kts, few weeks ago one got up to 520 or 530, that's the fastest i've seen in quite some time (L25) That's a hell of a tailwind.

December 27th, 2005, 21:48	#1
Buckeye757 Junior Member Join Date: Dec 2004 Location: Ohio Posts: 50	how fast is fast? A few days ago I was on a flight from ATL to PHL on a 757 when the capt. came over the PA and said we were criusing at 585 mph (he had to dumb it down for us). I've been flying for years now and for some reason when he said 585, that just didn't sound too right. Is this a normal cruising speed for a 757?

December 27th, 2005, 21:50	#2
GrantHubbell Senior Member Join Date: Dec 2004 Location: Hanger A-10 Posts: 833	You must of had a nice tail wind! __________________ Grant Hubbell "I understand JetU, not to be mistaken with Jetblue, sells a forth seat to Microsoft FS users. They can log NIC (nerd in command) time." -Bob loblaw

December 27th, 2005, 21:55	#3
BobDDuck Old Skool Join Date: Sep 2003 Location: Left Seat Posts: 5,482	He most likely gave you the ground speed. Although that is a pretty good speed considering you were going west bound. Somebody who flies the 757 (Don?) could give you the exact mach number that they normally cruise at but I am betting it is between .75 and .8. You would then have to look at what altitude you were cruising at and translate that into a airspeed. That said, I have seen low 500 ground speeds before in the CRJ going east bound and we cruise at .74 mach so it is very much possible that the number is correct. __________________ TBJC08 The Gear Monkey The Gear Monkey Store

December 27th, 2005, 22:11	#4
MDPilot Senior Member Join Date: Oct 2001 Location: Southeast US Posts: 760	Normal econ cruise on the 757 is .79-.80 mach. At typical altitudes, about 460-480 KTAS, so with a little tail wind, 510 or so knots groundspeed is very possible. ( I saw 610 the other day LAX-ATL) __________________ Mike

December 28th, 2005, 00:25	#6
Doug Taylor Agent Smith Join Date: Dec 1969 Location: KSDL Posts: 40,240 Blog Entries: 1	He might have also put it in MPH for shock value too. __________________ Doug Taylor http://76school.flyblog.com (old!) http://30west.flyblog.com (updated 11/28)

December 28th, 2005, 02:04	#7
Buckeye757 Junior Member Join Date: Dec 2004 Location: Ohio Posts: 50	Yeah, that's what i was thinking Doug . As soon as I heard that I thought to myself "that's awefully close to the sound barrier."

December 28th, 2005, 08:21	#8
MDPilot Senior Member Join Date: Oct 2001 Location: Southeast US Posts: 760	TAS would have to be close to mach, not the ground speed. If you are traveling .8 mach, the tail wind can be 200 knots and ground speed can be 700 (KTAS + tailwind), you are still only doing .8 mach __________________ Mike

December 28th, 2005, 15:04	#15
jonnyb Senior Member Join Date: Apr 2001 Location: So. California Posts: 1,304	Just wait 'till NJA_CAPT gets ahold of this thread. Here we go.....

December 28th, 2005, 16:25	#19
JDE Old Skool Join Date: Mar 2002 Location: Chattanooga, TN Posts: 1,507	NJA_Capt will definately be able to top this, but I still thought it was cool! __________________ Jason Last edited by JDE; January 29th, 2008 at 00:25.

December 28th, 2005, 16:30	#20
FlyChicaga Old Skool Join Date: Dec 2001 Location: Chicago, IL Posts: 4,783	I don't know what's so exciting about an airplane that can get to FL510. It's how LOW you can go that makes you a real pilot. __________________ "We thought we had the answers, it was the questions we had wrong." - Bono, U2

December 28th, 2005, 16:41	#21
Buckeye757 Junior Member Join Date: Dec 2004 Location: Ohio Posts: 50	Exactly what type of aircraft does NJA_Capt fly?

December 28th, 2005, 17:25	#25
Philip Senior Member Join Date: Oct 2005 Location: KAPA Posts: 1,469	I rarely see the lears at work bust 500kts, few weeks ago one got up to 520 or 530, that's the fastest i've seen in quite some time (L25) That's a hell of a tailwind.

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