Originally Posted by Double Zero
(Post 2930340)
Given that, how about a reliably informed & programmed ( ie. by Test Pilot / Flt. Test gen', not avionics types with computers in bedrooms ) - a decent Stores - ( weight / fuel Mangagement System, with civilian equivalent ?
Along with suitable decent sensors. Seems to a pleb' like me a much more user - friendly way to do things, after previous users & systems required a lot of heads-down deciphering... DZ |
Originally Posted by Mad (Flt) Scientist
(Post 2930507)
I think most TPs would run a mile if asked to actually 'program' an avionics system (and rightly so). All systems placed on aircraft and certified (at least by OEMs) are subject to test pilot assessment, but it doesn't make them the right people to design such, by any stretch of the imagination.
I'd nominate Per Pellebergs and his SAAB flight test crew in this latter role. |
Originally Posted by Mad (Flt) Scientist
(Post 2930502)
Also, give the 'worst case scenario' of being grossly overweight, there are warning systems or characteristics which will alert the crew to a too-slow approach; there's nothing to warn you that your calculated landing distance is too short (that I know of) except indirect clues. So to stall on approach requires the weight error and failure to respond to warnings. With an AoA approach, what's going to protect against overrun?
Originally Posted by Mad (Flt) Scientist
(Post 2930502)
Scheduled speeds can also be affected by, amongst others, VMC (a, l or g), VMU or variations in stall AoA with conditions; none of which will be captured by a simple AoA target.
|
I align my thoughts with those of MFS (post 40), particularly with the problem of avoiding runway overruns. Landing performance involves energy – speed. Thus without knowledge of a specific touchdown speed (target) how can the pilot relate his landing performance to the approach AOA. Note that carrier landings do not suffer this dilemma (and are the land based military less concerned?).
A related problem is how to deal with speed additives required for gusty wind conditions or specific additions for ice accretion; a performance decrement due to ice might not be detectable with AOA.
Originally Posted by formulaben
(Post 2931016)
... then you'll SEE the disparity between your planned Vref versus your AoA.
The compromise of using speed and AOA to alleviate the concerns cited above might increase workload and for the inexperienced pilot creates opportunity for distraction and error. |
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