B-737NG Cruise speed
 

Hi guys,

I was wondering what is the normal cruise mach number for the B-737NG.
Thanks

Cost Index dependent but no more than 78

Depends on cost index, wind component, cruise altitude, gross weight, and TAT. Higher weights, I've seen slightly greater than 785, and lower weights 76 plus or minus.

Enter cost index of 200, and you may see more than .80

Walder:p

OFDM:{:{ OFDM :*:*OFDM:}:}

You still cruising above 78?

CI 35 - cruise around .78
CI 100- cruise around .805

Cost Index is airline specific, not absolute, so your 35 could be another's 25!

We used to fly ours regularly at M.815/320kts on six leg days with 25 minute turnarounds. The only concession was to enter .8 on the climb page. Fortunately those days are passed. However it is still pretty common to be flying faster than cost index which in our case is below 20.

77,78,79, 80 sometimes. (rare) Depends how desperate you are......

I had never heard of cost index before!

....... Don't use them C172's! (except perhaps Vwallet)

Useful document here http://www.boeing.com/commercial/aer...7_article5.pdf