PPRuNe Forums - View Single Post - Calculating GW inflight A320
View Single Post
Old 21st Jun 2009, 21:05
  #3 (permalink)  
OPEN DES
 
Join Date: Apr 2004
Location: United States of Europe
Age: 40
Posts: 503
Likes: 0
Received 0 Likes on 0 Posts
A319:

(2xGW)+85 = green dot

Or to be more precise:

(2xGW)+85+ correction (1kt per 1000ft above FL200) = Green dot

So when in cruise you can deduce your GW (well at least your FAC calculated GW) by taking Green dot from the PFD. Substracting a correction of 1kt per 1000 ft above FL200. Substracting 85. And then divide by 2.

(Green dot (PFD) - correction (1kt per 1000ft above FL200) - 85) / 2 = GW (FAC)

You can compare this GW vs. GW on the status display or FUEL PRED page to assess FAC accuracy and/or loadsheet accuracy.


CI=0 will give you best rate of climb speed indeed. (ref: Getting to grips with a/c perfomance (airbus)) There is no rule of thumb but the SEVERE TURBULENCE speeds are a good approximation. (ref. FCOM)
OPEN DES is online now