Yesterday I was flying 3 90 watt solar panels to a customer, two on one lift strut and 1 on the other. They were about 40" long by 24" wide and weight about 15 lbs ea. My flight path took me right over one of my mountain landing sites, and I thought what the hell, let's shoot a landing! This was not the first time doing off airports sites with solar panels as an external load BTW.
Either I just got it too slow (this site demands a max slowness approach over a large bush) OR there was a little aero difference while carrying the external load, or a mixture of both, whatever, but damn, it "broke" (quit flying) and I was very thankful for the extremely rapid throttle response of the Zippered Rotax (lighter weight pistons, a noticeable different throttle response, instant almost). I thought of this thread...... and laughed, like I was going to worry about exactly HOW the throttle was advanced? ALL of it, ASAP worked in this case. I still smacked it down HARD (I have the Super Cub style Roberts Gear conversion, and it payed for itself on this "landing", but the plane was still flyable, though the extended rollout due to all that throttle got me into what I thought was unlandable terrain but turned out not so bad (the 29" Airstreaks also paid for themselves again) and it turned out I still had a flyable airplane and did not have to hike off the mountain. Whatever gets the job done, just like a three point or not on landing, hard to believe it's even up as a thread, whatever doesn't bend the airplane and saves me a walk works for me. I have to admit though, smooth apps sound better, as in not so desperate!