I have always had a problem in most aircraft with the vertical speed at cruise. I make sure my VS isn’t too much when approaching my altitude so it is a smooth level out (usually no greater than 1,000 vs). However usually a minute or two after I level out at cruise, my vs starts to become greater and greater, moving from about +900 to -900 vs and not sure why and then my plane starts to bop up and down. I usually have my trim at 0% or about 0-20%. Any tips?
On what aircraft is this happening?
You may be too heavy for your altitude.
Building on the above, it would be helpful to know the following to help diagnose root cause:
- Which aircraft you are flying
- Typical cruise speed when this occurs (and engine power - normal cruise is typically 80-86% N1 in most situations)
- Typical cruise altitude when this occurs
- Typical aircraft load when this occurs
- It usually occurs on the Crj, 737, and a320 family because is what I fly most
- I usually travel at about .78-.82 during cruise
- Lower altitudes are better and seems to start about FL300
- Aircraft is usually about half full
Very helpful info - thanks for sharing! That seems to rule out most of the “usual” causes, so probably best for a mod / IF staff to weigh in on this one…
Ok thanks for your help anyways!
Hi! I suggest maybe trying a lower altitude as you might be too heavy. Then you can step climb as you proceed with your flight.
Hope that helps!😊
Same problem here dude, i always cruise between FL280 and FL320 with speed of 0.78 on the B738 but when auto pilot reaches to the altitude that i’ve set, aircraft turns into a rolling coaster (btw i always do have a weight of around 67 tons)
Sounds weird, it never happens to me.
This topic was automatically closed 3 days after the last reply. New replies are no longer allowed.