Postby Timothy Huff » September 4th, 2019, 10:41 am
I used to instruct fixed-wing at Shoreham, where in the 90's there were frequently RC gliders and aircraft ridge-flying on the approach to runway 21 (as it was then) and I must have done hundreds of approaches within 200' or so of these. They never gave us any trouble or cause to worry, and as far as I know, no-one else was bothered by their presence. ATC would occasionally warn visiting pilots that they were there so it didn't startle them. It was otherwise a complete "non-event". Now that drones are being flown, I'm not sure we'd have taken quite the same sanguine view about it, because, then, there was a level of mutual trust in the airmanship of both the RC chaps and the pilots. I'm not sure it'd still be possible to rely on that with drone "pilots".
As regards impacts : I think different aircrew have different concerns here. The airlines are concerned about low-level engine failure in the case of ingestion by a large twin, and the huge maintenance bills to clear an engine which may - or may not have - ingested a cheap drone. Light aircraft pilots are probably at more actual risk, for they fly lower, and have less physical protection to a wind-shield strike from debris after it's passed through the 'prop. As much as anything the risk here is what subsequent mistakes a low-time pilot might make after such a collision with a drone. I hit a sparrow (or similar) once on finals, and was amazed to discover it'd pushed in the leading edge of a Pa28 about 3/4" at about 80 kts, I also heard the impact over the engine. So even light drones would, were I still flying, be something of a concern, nowadays.
What is simply unjust and wrong, is to compel RC pilots in good standing to deal with extra bureaucracy and expense because of the largely theoretical risk from (I presume) the minority of a group flying completely different craft away from club-fields, unsupervised by their peers.