Crosswind landing and propwash tests

[TUCKIE_JG52]

Originally Posted by =XIII=SAS

+1 here.

Now, I have to say this having been a flight instructor in Canada. Most europeans won't use the slide technique (wing low) for landing as for north American, it's the first one that's being thaugt. In fact, the slide was apparently removed from the PP training syllabus in France. The low airspeed indicated is normal only as you flare. That is, the crab approach should not cause any different speed indication since the plane has nothing to do with it's trajectory over ground. When you flare and de-crab, you go sideways from what the air around the plane travels, exposing the pitot tube to an angle thus creating the difference in airspeed. That's just another (there are many more) reason why we have two pitot tubes in airliners nowadays.

That decrease in IAS also tells you that the downwind wing is also partly "shadowed" or airflow-obscured by the fuselage. That momentarily affect the aerodynamic wingload and most likely loose so lift. That why, without passengers, you can start decrabbing earlier and set your attitude 1/4 mile before touchdown if you want.

Now, with your 108 km/h wind setting, I would not even think of going up for a spin, let alone trying a wing low landing!!! I'm sure they were all inside, sipping tea with scones and crumpets...

Cheers.

Hey, really good explanation! anyway this can be considered an instrument installation error, ins'nt it?

Will do more suitable tests... in that way