Does anyone want to share their recipe, if they have experience, for landing the Piper Cherokee 140? The one I am flying with a student has vortex generators which seem to be really delaying the stall.
Landing the Cherokee 140
- Thread starter PeterNSteinmetz
- Start date
It seems like the vortex generators should smooth out the airflow after the wing. I should think that will improve elevator control authority - would it not? There are no generators on the elevator itself.
https://www.boldmethod.com/learn-to-fly/aerodynamics/vortex-generators/
https://www.boldmethod.com/learn-to-fly/aerodynamics/vortex-generators/
Bob Noel
Member
I don't believe so. My understanding that It's not turbulence that degrades stabilator authority, rather the stabilator isn't large enough (the 140 has a smaller stabilator than the 180, for example)
So then the turbulence and vortex generators won't matter much for landing?
In any case, I would be curious to hear what your standard recipe was - thanks.
In any case, I would be curious to hear what your standard recipe was - thanks.
Bob Noel
Member
Except won't vortex generators lower the stall speed of the 140?
I think they do. By about 5 mph. So I guess the final approach speed is likely best reduced as well?
Bob Noel
Member
My concern would be still having enough airflow over the stabilator.
I've been trying to remember any specific settings I used with my 140 on final. I keep coming back to set an RPM (1600 rpm? 1700 rpm?) and target airspeed (about 65 knots) but then adjust it to keep a stabilized approach. One thing to remember is that you need enough power/speed for the stabilator to keep the nose up... and fly it onto the runway.
