Gunsontheroof From United States of America, joined Jan 2006, 3521 posts, RR: 9
Reply 1, posted (8 years 9 months 1 week 6 days 6 hours ago) and read 18105 times:
Quoting Md94 (Thread starter):
What are the basics about IAS and Mach. I read some in the other forums, but it did not help with all of my questions. Is there a chart somewhere to give me the proper speeds?
The red/white stripped needle on your airspeed indicator shows what speed is going to be "overspeed". It gets lower as you gain altitude, so keep an eye on it and keep your airspeed below it.
Md94 From United States of America, joined Oct 2006, 150 posts, RR: 0
Reply 8, posted (8 years 9 months 1 week 5 days 13 hours ago) and read 17951 times:
Okay thanks, that helps.
I spent a lot of time of trial and error last night figuring it out on the different aircraft. I finally saw the IAS indicator on the A321 speed indicator screen. Now I have to figure out the autopilot on the A321...but that will be another night at the controls.
Chksix From Sweden, joined Sep 2005, 345 posts, RR: 4
Reply 9, posted (8 years 9 months 1 week 5 days 4 hours ago) and read 17889 times:
I do like this in the 737:
Climb up to 10 000 ft at 250 KIAS on the speed setting.
Above 10 000 to about flightlevel 330 climb at 280 KIAS.
At that altitude, switch to Mach 0.78 while climbing to your final altitude.
When leveled off, set your economic cruise speed. (.78 to .85 or higher, depends on aircraft type)
(That final altitude depends mostly on your current weight, a MTOW 737NG has to stop climbing at FL330; a very light one can go all the way to FL410)
Further to Goinv's post, IAS tells you how the aircraft will behave in the air. Broadly speaking, it will fly in the same manner at 300 KIAS at 10,000 ft as it will at 300 KIAS at 30,000 ft, even though the actual (true) airspeeds will be quite different at those two altitudes.