PPRuNe Forums - View Single Post - How exactly does the apparent speed-stability of the Airbus A220 work?
Old 29th April 2025 | 14:39
  #2 (permalink)  
hans brinker
40 Countries Visited
15 Anniversary
 
Joined: Nov 2010
Posts: 1,167
Likes: 180
From: USA
Originally Posted by 777Supremecist
The Airbus A220/Bombardier C-series utilizes the C*U fly-by-wire flight control law, which is similar to the ones used in the 777/787.

Now, I don't understand much about the C*U flight control laws, but I understand that it has apparent speed-stability, which makes it behave like a conventional aircraft.

My question is: With a side stick that has no force-feedback, how do the pilots "feel" the plane? I am sorry if this sounds a bit dumb, but shouldn't the stick be stiffer/softer at different speeds? How does the plane achieve that with a side stick that has no force feedback?
Very valid question IMO. I was surprised how little feedback the 320 gives. I was asked to keep the speed up as long as possible in the descent but to cross fix XXX at 12000/210. Planned descend at 320, put a fix at XXX-10/12000' to have a level deceleration. Decided to hand fly to get a feel. Zero difference in feel between 320 and 210 kts, almost zero input to keep the level flight while decelerating from 320 to 210. This was on the Airbus 320, no clue how the A220 does anything, but I have not heard of sidesticks that have force feedback.
hans brinker is offline  
Reply