Re: Flight Levels and Speed

From: (ME Incorporated)
Date:         12 Jul 1999 10:14:22 -0400
Organization: World Trade Network, Inc. (
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John T:  That seems like a good "trick" the descent.  I'll have to try that
one in the sim!

Mike in Miami:  So, what we're saying is that without a GSI, the Sim's panel
is screwed up, sorta.  I think I can switch a GSI on, though.

Both:  Thanks for your answers!


"Flying is easy... buying the tickets, that's hard."

ME Incorporated <> wrote in message
> I'm sorry to post a question about a computer aircraft simulator in these
> newsgroups, but it does have something to do with Real Life (tm), and I
> to know!
> I was flying in Microsoft Flight Simulator 98, which is supposed to be
> pretty realistic when it comes to the flight models of the 737-300.
> I noticed that the higher you go, the lower the Maximum Mach needle was.
> This needle shows the fastest your aircraft is designed to go in terms of
> Mach (speed of sound), and moves according to air density (I guess.)  If
> your indicated airspeed is near or exceeds this marker needle, you may be
> trouble.  In real life this is bad.  In a simulator, well, reset!
>  At 19000 feet, you can go almost 400kts (or faster?), but at 33000, you
> can't quite get to 300Kts without having the "overspeed" warning show up.
> Is this realistic?  It makes sense, given that the density of the air is
> less, and I think I remember that the speed of sound is slower due to the
> lower air density, so therefore, the maximum mach would be at a slower Kts
> reading.
> I am not a physics major, but wouldn't it be faster to fly at the lower
> altitude in real life?  I can't see any difference in fuel consumption in
> the simulator, but then again, it's a (to be honest) crude simulation.
> Wouldn't it make sense for the airliners to fly at the lower altitude,
> the time, and turn around the aircraft faster?  This would allow the
> airlines to use less aircraft, less crews, and make more money with more
> paying passengers per aircraft per day.  (Provided, of course, fuel
> consumption stays constant at cruise.)
> Obviously, there might be a safety issue at the lower altitude, but that's
> for another discussion if my simple little theory is correct...
> Or is the simulator just screwed up?
> Just wondering... and thanks in advance!
> --
> "Flying is easy... buying the tickets, that's hard."
> -MikeyB