Stall Recovery

[Stby One]

I could not imagine having to do that...have you ever known of anyone in that situation having to do that proceedure?

Not for real, luckily. In our 6 month recurrent simulator training of crews we are now training crews in jet upsets (topics change every 6 months). In the sim we do put crews in situations like the one I described above. The 737 has a very strong pitch up moment when you add thrust, and sometimes you have to take it to the extreem to brake the upset/stall. The procedure I described before is the procedure recommended by Boeing for nose high jet upsets.

For normal stalls you wouldn't have to worry about reducing thrust, just firewall the engines, pitch down, get the wing flying again and you'll be grand.

 

[FL420]

24 carat

It sounds like your instructor has book learning but doesn't really understand what he is trying to teach. Ask your flight instructor what the addition of power does to the stall speed of an aircraft. It reduces it, especially in a prop aircraft, where the addition of power increases airflow over the wing and reduces the angle of attack. The reduction in AOA gives more G available to maneuver the nose breaking the sink rate sooner.

BTW. Ask him if an aircraft can be flown to zero airspeed without stalling or if an aircraft can be stalled pointed straight down at the ground. That will give him something to think about.

 

[SBD]

FL420, I know I am a low time guy and do not have that much experience but that was a very good post. A lot of people know the procedures of doing a maneuver but don't grasp the physics of it.

 

[aucfi]

He told me not to add power until you have a positive rate of climb, because otherwise you are just accelerating towards the ground.

How would you climb without power? Excess thrust is what causes you to climb and if you dont have any excess thrust, you would have to use kinetic energy gained during a dive/descent after the stall. Im pretty sure that wouldnt satisfy the PTS standard of "minimal loss of altitude during recovery".

Me, I recover from stalls doing all three things in one smooth motion; Lower the nose, add power(if not already full), level the wings if needed.

 

[TankerDriver]

Students do things somewhat mechanically in the beginning. Applying stall recovery procudures simultaniously doesn't come for some time. It is possible you were adding power as the nose broke and was pointing well below the horizon and then after thinking about it for a second or so, began to lift the nose above the horizon to climb away. I remember having students who'd do that in the early stages of stall recovery training and got better as time went on. Adding power while the nose was well below the horizon can cause rapid acceleration. If you're doing everything simultaniously, I'm not sure how he could have anything to say about your procedure.

 

[minitour]

BTW. Ask him if an aircraft can be flown to zero airspeed without stalling or if an aircraft can be stalled pointed straight down at the ground. That will give him something to think about.

and the answer to both is yes...absolutely.

I make it a point to show every student that the airplane WILL fly well below the bottom of the green/white arcs...


The way I teach stall recoveries (pwr off since that's relevant here) is to lower hte nose to the horizon which breaks the stall (remember, you only have to get lower than the critical AOA which in most cases doing approach to landing stalls, doesn't take much) and apply full power smoothly but quickly.

Get the positive rate of climb because of excess thrust, then clean up the aircraft appropriately. Flaps Gear Flaps Flaps.

IMHO

-mini

 

[viper548]

Get your instructor and the chief instructor together and ask how a stall recovery is done

 

[VNugget]

Change instructors.

 

[Magic1872]

and the answer to both is yes...absolutely.

I make it a point to show every student that the airplane WILL fly well below the bottom of the green/white arcs...


The way I teach stall recoveries (pwr off since that's relevant here) is to lower hte nose to the horizon which breaks the stall (remember, you only have to get lower than the critical AOA which in most cases doing approach to landing stalls, doesn't take much) and apply full power smoothly but quickly.

Get the positive rate of climb because of excess thrust, then clean up the aircraft appropriately. Flaps Gear Flaps Flaps.

IMHO

-mini

Exactly the same way I teach it as well. You only need to get the airfoil 1 degree lower than the critical AOA and the wing will start flying again.

 

[mddg3581]

Its more of a simultaneous flow. After breaking the stall establishing a nose to the horizon attitude will be sufficient to get a positive rate of climb and build airspeed. I retact first notch of flaps almost immediately and wait on the last two till there is positive rate of climb and increasing airspeed. I like to have my students pick some sort of floor though-theoretic runway. With this you can actually get an idea if you had a decent recovery or smashed into the runway.