1 of 3, Aircraft icing loss of control

Part 1 of 3.
NASA produced video on icing induced loss of control due to tail stall.

3 paths lead to tail stall conditions if there is ice on the tail:
-Flaps,
-Speed,
-Power.

There is usually no clue about it until a configuration change.

To recover from an ice-induced tail stall, you must take actions that are almost completely opposite from those required to recover from a wing stall. Making the wrong moves will aggravate the stall.

At low altitudes you may not be able to recover.

Visit NASA's "A Pilot's Guide to In-Flight Icing"
http://aircrafticing.grc.nasa.gov/cou...

• Category

  Autos & Vehicles

[James Sullivan]

And, expanding on that - Carb icing can occur within that temperature range, but with no visible moisture. Because of the hourglass shape of most float type carburetors icing can occur 0 - 80F and 50% or more humidity.

When encountering carb ice a pilot will notice a slight drop in RPM with the throttle in a static position. If carb heat is applied the rpm will drop again (due to the ice melting and water being burned off) then steadily increase back to cruise RPM.

[Matt Akers]

Ha, I like you you try and throw a quick line in to try and prove you are right. So far you didn't prove anything wrong about my last post. So lets address the Part 121 sub-part H. This is for aircraft requirements under the carriers op specs. I'm sure you actually read it first. You yourself can look up any aircraft you want in there Type Certificate Data Sheet and look for a section that says "Certification Basis." There you will find the FAR its under, and I promise it will never be 121.

[Matt Akers]

Well I can assure you that I am, but it doesn't matter for this. This has nothing to do with the twin otter, that was just a demonstration aircraft for testing done by NASA. But since you bring up the Otter; There are plenty that are still operating part 121 Check out Seaborne Airshuttle. Also it is certified under CAR3.Here is the type certificate so you can look yourself A9EA. Part 25 is for propeller aircraft over 19 seats or 19000 lbs.

[Matt Akers]

Wrong! It has nothing to do with relative wind. You have to have temps below freezing and be in visible moisture (Clouds,Fog,etc..) I can fly in the clouds all day long at +2 OAT and not get airfoil icing.

[Matt Akers]

It is obvious from your comment that you have not flown 121 aircraft before, and therefor do not have the knowledge base to comment like that. Of course any aircraft can see these type problems. In the video the talk explicitly about regional turboprops (Those are part 121 operators). For that matter 121 in a mode of operation and not a certification basis for aircraft.

[Sebastian Cowley]

noo thats not what i meant.. I meant prop mounted on the wing, and in addition to that, jet fans mounted on the empenage.

[zaphr89]

Thats kinda what a turboprob is :P

[Sebastian Cowley]

Am i seeing both props and jet engines on that model aircraft behind him?? 0_o

[VideoGameCoupons]

wow