PPRuNe Forums - View Single Post - Unusual attitudes
View Single Post
Old 7th Dec 2020, 16:24
  #44 (permalink)  
Stuka Child
 
Join Date: Apr 2019
Location: Montreal
Posts: 26
Likes: 0
Received 0 Likes on 0 Posts
[=-]]]The amount of misinformation on the Internet is staggering, and it is worrying that people actually come on here for actual flying advice.

Please don't quote out of context and without thoroughly reading the material. D P Davies' book doesn't say "STAY OFF THE RUDDER" as some sort of general rule for swept wing transport-category aircraft. The context is specifically recovering from "large bank angles in isolation" (aka not at a high enough angle of attack to have a wing drop on you or stall both wings, also not a combination of large bank angle + pitch upset) and for very high speed excursions where "in a type on which you are not sure of the rudder effectiveness in the way in which it rolls the aeroplane" (he is reffering to rudder reversal at high Mach).

Sure, you guys roll level on ailerons at the stall and let me know how it goes for you. Just please make sure there's no one on the plane with you.

While there is no intentional spin testing for these types, from flight test data and accident and incident data, we can gather that:

The Airbus A310 and B757 will happily spin.

The B717 will do at least one turn.

They can all recover, given enough altitude, but do you really want to put other people and yourself in that situation?

The Dash-8 also has a nasty wing drop, so does the PC-12 - and I'm sure that there are many other popular aircraft that have some pretty ugly power-on stall characteristics, although I don't currently have the data to back that up.

Long story short, if you're going to use ailerons at least have the decency to push forward and break the stall first. No you are not going into the ground because you've pushed forward on the stick. Pilots do it all the time on gusty approaches. Also, pushing the stick forward doesn't mean going 40 degrees nose down. You don't need that steep an angle at low altitude. It is simply a question of unloading the wings and cleaning up the airflow around them.

There has been an hysteria about use of the rudder ever since the horrible American Airlines A300 accident. By all means, use it judiciously - there is obviously the possibility of causing an even greater upset and/or breaking something, but if it needs to be used, it should be used! It's a main flight control and it's there for a reason, and not only for engine failures or tracking down the runway!
Stuka Child is offline