PPRuNe Forums - View Single Post - AF 447 Thread no. 4
View Single Post
Old 1st Jul 2011, 09:30
  #609 (permalink)  
sensor_validation
 
Join Date: Jul 2009
Location: UK
Posts: 133
Re A340 airprox zoom climb

@Grity

Thanks for the update - I started on a more detailed digitization of the graphs (there are shareware/opensource tools) - but didn't get too far! Your plots do show the effect of pilot intervention to cut the peak height reached, but its interesting to see the AoA on the way down back in same range as on the way up!

@HazelNuts39

Do you get the phugoid plot purely from energy considerations assuming initial AoA correct for 1g flight? If so can it be redone with an initial AoA giving 1.5g which should give a higher climb rate and shorter period.

I assume natural damping very difficult to model but how much of a roller-coaster ride is it in an A340/A330 with rearward cg @FL350 without pitch and throttle control if you don't start with a trimmed condition?
sensor_validation is offline