Why does the Pilatus have this on its ailerons?

[LDJones]

What is the purpose of this lip thing on the trailing edge?

View attachment 48925

It keeps the snow from sliding off.

 

[GRG55]

Well, I'm pretty sure 6PC isn't a CFI but his former CFI should've covered Gurney Flaps on day one...along with other basic GA aero topics such as vortex generators, winglets, Whitcomb rule, Reynolds numbers, etc.

The CFI probably covered all those topics, but I heard those are all extra credit voluntary electives for Cirrus drivers once they've learned about the red handle...

 

[Marky_24]

Go to minute 1:30 and he describes what it is

 

[mscard88]

The CFI probably covered all those topics, but I heard those are all extra credit voluntary electives for Cirrus drivers once they've learned about the red handle...

6PC was too occupied '"sampling" the fuel samples.

 

[SixPapaCharlie]

6PC was too occupied '"sampling" the fuel samples.

The burning sensation tells you it's working.

 

[Cpt_Kirk]

Go to minute 1:30 and he describes what it is

The original picture is a -45 and isn't equipped with Flettner tabs.

 

[Matthew]

The burning sensation tells you it's working.

If it burns when you pee, then it isn't 100LL.

 

[Velocity173]

Lower Gurney on helicopter stab.

 

[denverpilot]

I still don't know where the fuel goes

Stop drinking fuel samples!

But that's where the fuel goes! In the sample cup and then down the hatch!

 

[3393RP]

I was about ready to say, None of you guys watch open wheel racing, cause thats a Gurney flap.

Invented by one of the best drivers/designers in open wheel history (and a gentleman I greatly admire), Dan Gurney.

I believe Dan is 85. His organization, All American Racers, was opened around 1965. AAR is still in the racing business, as well as providing design, engineering, and construction for a couple of private space programs.

https://en.m.wikipedia.org/wiki/Gurney_flap

https://en.m.wikipedia.org/wiki/Dan_Gurney