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Old 13th July 2011 | 21:05
  #267 (permalink)  
rudderrudderrat
 
Joined: Oct 2009
Posts: 1,270
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From: UK
Hi DozyWannabe,

I'm still not quite there am I?
unless you're talking about in their bodies through the motion of the aircraft
Er .... No.
Given that the sticks are not backdriven
- They don't have to be.

In Direct Law, the aircraft is stick free speed stable (just like a conventional aircraft). Provided I don't move the thrust or stab trim, it will continue on a trajectory at the same speed.

If I experienced UAS, all I have to do is leave it alone. If whilst attempting to hold the wings level, I inadvertently pulled back on the stick a little for a prolonged time, it would climb and slow down a little. If I relaxed on the stick, it would descend and regain speed again.

In order to get it to fly much slower, I'd have to pull back really hard or move the stab trim. That effect is what we call "elevator feel".

It is absent in ALt Law, and makes the pilot completely reliant on power and pitch. A human pilot, deprived of this sensory feed back, is reduced to an attitude clues processor - much like the autopilot that just gave up.

PS Please see JT's post #282, which explains it better.

Last edited by rudderrudderrat; 14th July 2011 at 10:56.
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