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cruise speed - Printable Version

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cruise speed - andy14 - 27-08-2005

In a 737400 what is the cruise speed i go 300 knts can you go higher than that without overspeed


Re: cruise speed - FlyBoy2 - 27-08-2005

it depends on how high you are the higher the Atitude the lower your speed is going to be before you go into overspeed




Re: cruise speed - lightrail - 27-08-2005

When you get higher in altitude (say above fl260) , switch over to Mach - that way you won't overspeed as you get higher. You should be able to do
around mach 0.8 or so without overspeed.


Re: cruise speed - pagir - 27-08-2005

SWAFO certainly know best about mach and knots (at least from his F18 era Wink ) but switching from knots to mach won't allow you to fly
faster.

The mach scale vary with altitude, because the speed of sound vary with temperature. If you are very high (and the air is colder), the
sound travel slower than at sea level (where the temperature is higher). You don't have to travel as fast at 45 000 to break the sound
barrier.

Between 30 000 and 60 000 feet, the speed of sound is about 570 knots, and at sea level it's about 660 knots.

So mach and knots are different scale, mesuring two separate thing. If you fly at mach 0.8, your speed is about 80% of the sound's
speed. It won't allow you to know your "true speed".

Pagir

Look at: http://en.wikipedia.org/wiki/Speed_of_sound




Re: cruise speed - nem - 27-08-2005

Quote:pagir wrote:
It won't allow you to know your "true speed".
[nitpick]Neither does the KIAS reading from the plane's gauges.[/nitpick] Flower Smile



Post Edited ( 08-28-05 00:34 )


Re: cruise speed - SWAFO - 28-08-2005

Quote:andy14 wrote:
In a 737400 what is the cruise speed i go 300 knts can you go higher than that without overspeed

It seems that you post a lot of questions with easy to find answers! A quick Google would turn up lots of answers on this topic. Your
messages have always sounded a bit trollish Wonder

I just discussed 737 cruise speed a few days ago... a forum search would also turn up relevant results! Please try these various
avenues of finding information next time, before posting easy questions! Thanks!

Anyway, the cruise speed of most 737's will vary between about 300KTS GS, all the way up to 500KTS ground speed. This is in the 345
to 615 MPH range! Pretty fast! Lots of conditions are factored in to the final determination of cruise speed. These include airline specific
economy settings, altitude, air pressure, various other atmospheric conditions, departure delays, and LOTS of other things. 300 KIAS is
about the cruise speed of a 737 at FL290 (roughly). You ask elementary questions, so I'm giving elementary answers! Hope this helps!




Re: cruise speed - JaWood - 29-08-2005

Also, most FS 737 panels will have a max airspeed barber pole on the gauge. If you go past it, you're considered overspeed. I set my autothrottle
usually 15kts slower than the barber pole. This gets me arount mach.82 (usually) with still enough buffer for sudden wind sheers.


Re: cruise speed - SWAFO - 29-08-2005

Mach .82? Someone likes their speed! That's a bit faster than we normally go!




Re: cruise speed - Sovek - 29-08-2005

I fly at mach 8.3-8.4 all the time :P


Re: cruise speed - pagir - 29-08-2005

8.3 8.4??? Are you flying an secret hypersonic X737 ? lol

Pagir




Re: cruise speed - Sovek - 29-08-2005

I push it as fast as it can go, without it going too fast. that and its the kittyhawk 737-800


Re: cruise speed - Ryanamur - 29-08-2005

Then you'd be flying at M0.83 or M0.84 and not M8.3 or M8.4 Smile Smile Smile




Re: cruise speed - Sovek - 29-08-2005

oh, my mistake,


Re: cruise speed - pagir - 30-08-2005

Bah, We all understood what you were saying.

Altough I'd love to fly an hypersonic X737 Wink

Pagir