PFGiardino

I just submitted my paperwork today and am expecting my CFI oral to be on Saturday. It's an ERAU check oral... anyone have any advice? I'm feeling pretty confident, but the checkride jitters are sure on their way.

I'd say one of my weaker areas is aerodynamics. Specifically... why in a skid does the lower wing have a higher angle of attack, thus creating the rotation when stalling and creating a spin?

And when performing a slip-to-landing, if you were to roll wings level while keeping rudder imput constant, I'd call that a skid, which is more conducive to the stall/spin. Am I out of line?

Finally, what IS the difference between a forward and side slip? The Airplane Flying Handbook has pictures of it, but they look like the same image, just one being set at a different angle on the page.

Thanks.

shurb

dude just calm down, you will do fine. they just wanna make sure you can teach and fly at the same time.

PFGiardino

Thanks, I can do that. And I forgot... a foreward slip is a side slip.

keiundraj

No a forward Slip and a Side slip are 2 different things.

keiundraj

A forward Slip is preformed to loose as much altitude without gaining airspeed.... A side Slip is preformed to keep the longitudinal axis of the aircraft aligned Parallel to the runway while in a crosswind landing....

They're both preformed the Same way.... The side slip you're just using the rudder to prevent the aircraft from turning in the direction that the wing is down in. The Forward Slip you're using the rudder to put the fuselage into the relative wind to produce maximum amount of Drag, Hence the lack of gain in airspeed

keiundraj

In any uncoordinated stall, the rudder will be turned towards the slower wing. This wing will stall first. It is this factor that makes the slipping stall a safer stall. The rudder is toward the high wing that, when stalled must fall through level before dropping into the spin mode. This gives you additional time to correct the problem. In a skid the low wing stalls first. You don't get the time or attitude opportunity that a slip-stall gives before going inverted. Neither stall is something you would want to happen turning final.

That being as we know in the turn the Wing producing more Lift also produces more drag... The byproduct of Lift is drag, but in a Skid the Rudder is slowing the low wing down more causing a lower angle of attack to the relative wing, therefore producing a stall on the low wing instead of the High wing???

keiundraj

*EDIT* The byproduct of Lift is drag, but in a Skid the Rudder is slowing the low wing down more causing a *HIGHER* angle of attack to the relative wing, therefore producing a stall on the low wing instead of the High wing???

coldpilot

Think of it this way... In a forward slip you are facing sidways... in a side slip you are facing forward. I know it is backwards but my PPL instructor taught me that way and I have/will never forget the difference. Remember the principle of primacy!!!!!!

Airplane Crazy

It's true CFI rides are hard, so be prepared. I know how you feel. I'm on the same boat. I'm taking my CFI initial this Sunday. Just study good, be nice to the guy cause those FAA guys thinks they are gods gift, so they like for you to respect them. Think before you answer. Don't rush and don't guess. If they know you are gussing they get mad and than they will go harder on you. If you don't know an answer just say you don't and tell him you know where to find the answer. Good luck.

By the way side slip is when your airplane is not flying straight. It's flying sideway when you are trying to lose altitude. Forward slip is when your airplane is flying straight for example when you are doing a corss wind landing. Although you are using rudder your longitudinal axis of the airplane is aligned with the runway. Plus go by things your instructor tells you that way if the examiner finds you wrong you might just get to slide. Some times if you say something wrong and you can prove you were tought it wrong like this examiner will let you slide saying ok I'll tell you the right way and from now on go by my way. That happened to a friend of mine.

FL600

Just wanted to say GOOD LUCK and to take it slow and relax the best you can. Most importantly, have fun!!