Despegue,
For some reason i remembered this discussion in my pc sim today..here are my notes..
1.40 min remaining,67t, FL370,M.78 eco.
I enter select M.80/320 in my pc fms and i notice 2 mins decrease in flight time,100kgs less.
Now as a poor airmanship professional i maintain my M.78 as i rather save 100 kgs than 2 mins.
At 65T my indicated speed shows 250kts, barber pole 266kts.
Now selecting M.80 i get 260kts indicated, a mere 6 kts below an overspeed.
During one hour cruise without any turbulence my speed in few occasions increased to 256 kts,which if i had M.80 i would have got into the overspeed.
Do i think the 2 mins save worth that overspeed? i think not.
Now at top of descent i select LVLCHG withm.78 initial rate 3800 ft/min during the first 3000ft then about 3400,speed at on point increase to m.798... In which case if i had M.80 selected i would have been into m.818.. Pretty close
to another overspeed....
Now the cabin rate,,,,shows 1000 ft min, now it may nit be a new NG but still
not so nice for pax,,,,we all know the target is 300..
Now if i had selected m.80 the rate would have obviously been higher..close to 4500 ft/min.
Such rate for me is just not comfortable for me so im sure for the pax neither.
So after 2 close if not overspeeds,tell me how how i would explain to my superior 2overspeeds to gain 2 mins and burn 100 kgs more.
Now please reading a few of your arrogant answers,i suggest you get on with your mighty professionalism and let us discuss our opinions without racist comments.
