Plane Fishing (Shallow Thoughts)

Akkana's Musings on Open Source Computing and Technology, Science, and Nature.

Tue, 27 Aug 2019

Plane Fishing

[plane fishing] White Rock has a "glider port", which is just an informal spot along the edge of the canyon where sometimes people fly R/C sailplanes. On days when the winds are right, gliders can get some pretty good lift.

Last Sunday wasn't one of those days. The wind was coming from every direction but east, so the gliders were having to use their motors periodically to climb back up to altitude.

I was mostly trying to stay above the canyon rim, but I noticed all the other pilots were flying down below, so I decided maybe it wasn't that dangerous to let my plane get a little below the edge for a while before starting the motor. Wrong! Below the edge of the canyon, there's a risk of catching some evil rotors off the cliffs. One of those rotors caught my glider's wing and tossed it into a spiral. I was able to recover and get the plane flying straight again -- straight toward the cliff. It smacked hard -- I saw parts flying everywhere.

I didn't expect that the plane itself was salvageable -- it's only styrofoam, after all -- though it looked surprisingly intact. In any case, Dave and I hoped to recover the components: battery, motor, receivers, servos. Hiking to the plane proved difficult: you can get fairly near there on the Blue Dot trail, but then you need to climb three levels of cliff to reach the place where the plane sat. Coming down from above definitely would have required rapelling gear.

But Dave had an idea: let's go fishing!

It took some experimenting to figure out what sort of hook, line and pole you need to fish for a thirty-ounce plane that's fifty feet down a sheer cliff out of sight from the cliff above it. Dave did the fishing and I acted as the caller, sitting some hundred feet away where I could spot the plane through binoculars and shout out which direction he needed to move the line. But we got it in the end! I shot some quick snapshots while I wasn't busy spotting, which you can see here: Plane Fishing (photos).

[plane on the hook] Amazingly, the plane was almost undamaged. The plastic spinner was destroyed, but the motor seems fine. The nose of the plane is very slightly askew but not broken. The battery, after being plugged in to the receiver for 48 hours, was down to zero volts, but when we charged it carefully, it took a charge. The canopy went flying off at the moment of impact and is down there in the rocks somewhere, so I have a new canopy, spinner and collet on backorder, but in the meantime, the plane is probably flyable. I'll find out this weekend -- but if we fly at the gliderport, I'm not letting it get lower than cliff level, ever!

[ 16:57 Aug 27, 2019    More misc | permalink to this entry | comments ]