I am experiencing quite noticeable porpoising on my flights in the 737. Anyone?

 

These would likely to be caused by you coming into a airport too fast as the wings simple do not want to loose the lift. You also want to make sure that when you flare it is not over excessive. A flare of 2 to 3 degrees is all you need for a 737. Check your Approach reference page in the FMS make sure you don't have really out dated speeds as that would give you a much higher approach speed.

I've never really noticed it . Is this in level flight, or when climbing/descending?

Normally a plane that has a porpoising problem will do it even in level flight while holding a

steady speed. I've never noticed that on this end.  Which model 737?

Check your Approach reference page in the FMS make sure you don't have really out dated speeds as that would give you a much higher approach speed.

I am not certain I understand what you mean by really out dated speeds. I have been led to believe that a lot of the information in the FMC is frequently if not constantly updated. I know that at 20 nm from T/D I select the VREF for 30 degrees flaps to the scratchpad and the right line select it up to line 4. I check it on final too see if it has changed. I have never seen it decrease by more than one knot which insignificant.

 

Where would the out dated speeds come from?

 

 

I select the VREF for 30 degrees flaps to the scratchpad and the right line select it up to line 4.

 

I believe the correct procedure is to press twice the LSK for the landing flaps you want, instead of up selecting it. I don't really know why, but Tutorial #2 recommends that. Maybe it enables vspeed auto updating?

The porpoising I am experiencing is in level cruise flight

737-8 nx

I believe the correct procedure is to press twice the LSK for the landing flaps you want, instead of up selecting it. I don't really know why, but Tutorial #2 recommends that. Maybe it enables vspeed auto updating?

That doesn't rally matters. You achieve the same thing either way.

 

 

Maybe it enables vspeed auto updating?

I don't believe the 737 does that.

I am not certain I understand what you mean by really out dated speeds. I have been led to believe that a lot of the information in the FMC is frequently if not constantly updated. I know that at 20 nm from T/D I select the VREF for 30 degrees flaps to the scratchpad and the right line select it up to line 4. I check it on final too see if it has changed. I have never seen it decrease by more than one knot which insignificant.

Where would the out dated speeds come from?

That should be close enough. 1 knot? You could cross paths with a butterfly and notice more airspeed variation, let alone the lightest wind or another jet taking off. . . etc.

 

But, I see the OP is talking about cruise.