120ccpm
lvl.4
Flight distance : 1396755 ft
United States
Offline
|
Bright Spark Posted at 1-23 23:15
Thanks for your explanation.
But it remains odd from my point of view that, since we seem to agree that since the mini attempts to govern its speed to in p mode 18 mph, 30 in s and so on, by ground speed alone, and that it thus checks it when travelling down wind, it does not attempt to maintain 18 in p mode or rth by using some or all of its s mode capability.
This may override its p tilt limit, but why not to aid wind penetration? Correct me if I'm on the wrong tack, but if the speed is still restricted to 18 mph, everything else remains as it should.
It's very odd from my point of view too. We actually don't know what's the max tilt allowed on the MM during RTH. What we know about it is that on a calm day, the RTH speed is around 8/ms, so we assumed it's basically flying within the P-Mode limits. But in reality nobody knows what is the exact algorithm that governs RTH on the MM... whether it actually tries to reach 8m/s in case of headwind, and how much tilt is allowed to use.
I looked at another thread (the "jetstream" flyaway) to see if the flight record would teach us something, but I didn't find anything conclusive: speed is always well below 8m/s, so it seems the AC was facing some headwind. The tilt angle was mostly bouncing between 15 and 20, but it was not consistently at or near 20, as you would expect if 20 was indeed the limit. Maybe it was because of turbulent air, or because the AC still needs a few degrees to remain stable... I don't know, but there were periods of time where it was just going slow at 15 degree tilt, no apparent reason.
For sure, though, there were no tilt values near 30, so clearly the AC could have gone faster if it were programmed to. |
|