PPRuNe Forums - View Single Post - Until the cruise..
View Single Post
Old 29th Mar 2005, 09:08
  #5 (permalink)  
kooyheier
 
Join Date: Apr 2002
Location: Not quite Sure
Posts: 156
Likes: 0
Received 0 Likes on 0 Posts
Ahum... well to be completely honest.. most of us don't know them because they are of no significance to us... Because we either do a flex T/O or a TOGA T/O so the EPR settings (because we don't use N1 on I.A.E. engines) don't mather we just accept what the flex or toga gives us .. But going on your temp on the day.... and a full load... taking off from EGKK (because I don't fly from EGLL)I would say about a flex of 50' c.
R.O.C. just after T/O ...once past our acceleration altitude (standard normally 1500'/aal) We bring the thrust levers back from the Flex/MCT gate back to the CLimb gate, this engages the Autothrust.
Taking off from EGKK 08R the departure would most likely be a DVR 2P climbing initially to 6000' Once we get a further climb clearance. We than, on the FCU pull for "open Climb" That gives us climb power (because the thrust levers are in the climb gate and won't come out of the climb gate till landing because of the autothrust) and we accept what R.O.C. that gives us but with this load it'll be around 2500'/min for the initial stages of the climb (just after T/O till FL180) reducing to around 1500'/min in the latter stages (FL180 to FL300) and probably around 500 to a 1000'/min for the final climb....Which in your scenario would be up to FL350 which we would be cruising at for this short flight..
And as said in my last post the cruising mach would be .78
Because this beautifull peace of machinery is so computerised... we don't tend to use R.O.C.' s and R.O.D.'s because most of it is managed by the computers on board. The only time we tend to use V/S selection on the FCU is when we are doing a CDA meaning a Constant Descent Approach (due to noise abatement).... Which means that in our approach to the airfield once descending below 6000' agl we are not allowed to fly level for more than 2,5 miles with a R.O.D. of less than 100'/min so if they tend to radar vector us around the place we need to keep the descent going however shallow the descent angle maybe... in that case we use a selected R.O.D. but again no fixed value just good sence from the pilot flying the aircraft that day.
Hopefully a bit of help for your sim ride...

Enjoy
kooyheier is offline