Power-off Stall Practice

[Savate]

[font=Verdana, Arial, Helvetica, sans-serif]I'm trying to get all my notes squared away.

Need help with Power-off Stall Practice Procedure
(this is for a C-152):

Please tell me what to add or change.....

Begin:
1) Carb Heat ON
2) Drop RPM (below 17k RPM?)
(Flaps , at 10deg, etc. here?)
3) Pitch for 40kts(?)
4) Stall

Stall Recovery:
1) Nose to horizon; restabilize (straight and level)
2) Throttle to Full (apply RT Rudder!)
3) Carb Heat OFF
(Flaps back to 0deg in increments?)
4) Pitch for Vx (54kts)
5) Resume climb

I'm sure there may be different ways to do this in the practice area, but does this look about right?[/font]



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[Kream926]

get in a flow habit

i do reverse L
1st clearing turn
gas - on
mix - full
carb heat - on
throttle back to slow down
2nd clearing turn
10 degrees throttle 1200
glide 65
pitch up to induce

recovery - pitch down to break stall full full full nose to horizon

remember pitch and power before nose to horizon, you dont want a secondary stall

heres a silly way i remember what power setting for clean or dirty
dirty dozen - like the rap group
when your dirty use 1200 rmp
clean = idle
and dont forgett to establish a glide, or at least thats the was i learned and thats the way i teach my CFI instructor

 

[Fly_Chick]

Remember, the Power Off stall is simulating stalling and recovering while approaching to land. You want the aircraft set up in the manner in which you usually have it set up while landing. usually slow, full flaps, low power setting. The way I teach them is:

1) Pre-manuever checklist (see Kream's comments), pick a point on the horizon as a reference point to maintain heading, or pick a point off the side as your pitch up may preclude you from seeing your point on the horizon.

2) Carb heat On

3) RPM to 1500 (to get you slowed down)

4) maintain back pressure so you do not loose altitude

5) add flaps in increments to 30 degrees

6) once at your final approach speed (I use 65 kts in the C152), power to idle (use rudder to keep coordination)

7) maintain glide at 65 kts for 3 seconds, you will loose a few feet of altitude here

8) imagine the ground is 100 feet below you and you do not want to go any lower (i.e. you are at 2500' agl practicing, and the ground is at an imaginary 2400' agl.)

9) now start pitching up so you do not hit the imaginary ground, your airspeed will drop

10) maintain back pressure to not touch on the ground

11) your pitch will get higher, use rudder to keep coordination

Recover:
12) once you stall, full power and nose on the horizon, remove first 10 degrees of flaps, then start your climb.

13) retract flaps in increments.

The power-off stall recovery portion is the same manuever as the "go-around".

One way I remembered the power settings for power-off and power-on stalls:
- Power-on stall, known as the "clean" stall, no flaps, when you were 12 (1200 rpm) you had clean thoughts
- Power-off stall, known as the "dirty" stall, full flaps, when you were 15 (1500 rpm) you had dirty thoughts

Good luck with your training!

 

[Ralgha]

Sounds like a **CENSORED****CENSORED****CENSORED****CENSORED** good question for your CFI. Why the hell aren't you asking him/her this?

 

[westwind]

Sounds like a **CENSORED****CENSORED****CENSORED****CENSORED** good question for your CFI. Why the hell aren't you asking him/her this?

Jeez, give the guy a break. He's doing a little extra study on his own. You were/are a CFI according to your profile. Were you available for your students questions 24/7? Anyway, he is also looking at how other people set up for the same maneuver and what different ways we might have been taught.

Savate, About the only thing that I can add is to level the wings more with the rudder than with the ailerons. You look to be on the right track. Good luck and enjoy it.

 

[Tinstaafl]

I disagree with the 'level the wings with rudder' advice. The goal is to prevent yaw. If that leaves a wing down it's not a problem. Once unstalled use normal co-ordinated controls to regain wings level flight.

 

[moxiepilot]

Here's the procedure from a 141 I attended about 3 years ago:

Altitude above 1500'
clearing turn
fuel selector on
mixture rich
carb heat on
throttle 1800 rpm
second clearing turn
flaps 30 degrees 10 degrees at a time
throttle 1200 rpm
airspeed establish 60 kias
glide 60 kias level or in 30 degree bank
pitch to induce stall
stall indications - imminenet - first buffetin or loss of control effectiveness
stall indications - full - nose down pitchng, high sink rate
recovery
pitch down
wings level
max power - mixture rich, throttle, full carb heat cold
pitch for Vy
flaps 20
airspeed 55 kias & positive rate
flaps 10
accelerate to Vy (67)
flaps verify up
level off, pitch & trim
establish cruise

just another procedure - hope it helps

 

[deadstick]

Does anybody use the stabilized 3-500 fpm descent at approach speed...just like you are on final? What about the turns (i.e. base-final turn)?

 

[rubberducky]

I disagree with the 'level the wings with rudder' advice. The goal is to prevent yaw. If that leaves a wing down it's not a problem. Once unstalled use normal co-ordinated controls to regain wings level flight.

FAA-S-8081-14A​

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1-27
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B. TASK: POWER-OFF STALLS​

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(ASEL and ASES)

REFERENCES: FAA-H-8083-3, AC 61-67; POH/AFM.
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Objective.​

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​

To determine that the applicant:

1. Exhibits knowledge of the elements related to power-off stalls.

2. Selects an entry altitude that allows the task to be completed no

lower than 1,500 feet (460 meters) AGL.

3. Establishes a stabilized descent in the approach or landing

configuration, as specified by the examiner.

4. Transitions smoothly from the approach or landing attitude to a pitch

attitude that will induce a stall.

5. Maintains a specified heading, ±10°, in straight flight; maintains a

specified angle of bank not to exceed 20°, ±10°; in turning flight,

while inducing the stall.

6. Recognizes and recovers promptly after the stall occurs by

simultaneously reducing the angle of attack, increasing power to

maximum allowable, and leveling the wings to return to a straightand-

level flight attitude with a minimum loss of altitude appropriate

for the airplane.

7. Retracts the flaps to the recommended setting; retracts the landing

gear, if retractable, after a positive rate of climb is established.

8. Accelerates to VX or VY speed before the final flap retraction; returns

to the altitude, heading, and airspeed specified by the examiner.



FAA would like to see this and also you need to remember the ingredients for "baking" a spin, i.e, yawing force. ​

 

[Ralgha]

Jeez, give the guy a break. He's doing a little extra study on his own. You were/are a CFI according to your profile. Were you available for your students questions 24/7? Anyway, he is also looking at how other people set up for the same maneuver and what different ways we might have been taught.

Savate, About the only thing that I can add is to level the wings more with the rudder than with the ailerons. You look to be on the right track. Good luck and enjoy it.

Actually, yeah, I was available 24/7. They all had my phone number and could call me at any time.

The problem with learning how to do a maneuver on an internet board is that our authenticity can not be verified. We could all be a bunch of armchair QBs that think we know what we're doing, but really don't have the first clue (like airliners.net).