Archive for June, 2010

Solstice Skies

Monday, June 21st, 2010

A pilot in front of the Timberline launch at Hull

A pilot climbing out in front of Timberline launch at Hull

We left the South Bay that afternoon, following the well-worn path to Hull – through the City, across the Golden Gate, up the long road to Ukiah. Until we reached Santa Rosa, the traffic was heavy, but after that, every mile took us farther away from the hustle and turmoil of the mundane world. A pause in Ukiah for fuel and provisions, then we were winding our way east into Coastal Range, along the ever-dwindling succession of roads that lead to Lake Pilsbury. By the time we reached the campsite, night had fallen – time for fiddling with tents, shuffling gear, and some hopeful speculation about what the morrow might bring.

The next morning was gorgeous, but the sky was strange. To the north, Hull was the same as ever, looming above the valley like the lord of some forgotten kingdom, but to the west, an unexpected wall of clouds peered above Sanhedrin – invaders, perhaps, or bearers of some disturbing message. Their meaning was subject of some speculation as we drove around the valley, decided on a landing site, and loaded our gear for the trip up the hill. Whatever this sky meant, it did not seem like an ordinary day.

Unfortunately, it also didn’t seem like I’d be able to fly. I had just recovered from a cold, and by the time we’d reached launch, it was clear I was in no shape for a struggle. If conditions had been mild, I might have given it a go, but they were an thing but mild. With gusts blowing up the hill, clouds boiling with turbulence, and every sign that the air might be stalked by invisible dragons, I decided, reluctantly, to stay on the ground.

One makes these decisions with a mixture of smugness at one’s wisdom and regret for lost opportunities. That evening, as I listened to my friends describe their flights, I felt quite a bit of the latter, for it was clear I’d missed an interesting day. Still, the wine was good, the mountains were beautiful, and the odor of sage was a welcome change from the dust of the city. Also, my lungs seemed to be healing, so I had some hope of flying tomorrow.

The second morning was even more unsettling than the first. Clouds were sweeping in from the north – the wrong side of the mountain – promising conditions that might range from nasty to unfliable. By the time we reached launch, a particularly ominous one had formed directly above the peak: an ugly roll of mist, tattered by the wind, that it was impossible to watch without feelings of concern. I still wasn’t 100%, but I’d come here to fly, darn it, so I unloaded my gear. On the ground, I was a victim, passively accepting my fate. In the air, I might still get hammered, but at least I’d have a chance to fight.

Conversation was more subdued than normal as we set up our wings, and several people elected not to fly. When the first pilot launched, we watched him like penguins watching the first bird into the water, looking for signs of that shark. The air did not look like a terrific amount of fun, but we’d seen and faced, so we followed him, one after another, until it was my turn. My flight plan was simple: I’d get a good strong launch, sniff around in front of the hill, and if I wasn’t entirely happy with what I felt, turn left and flee for the LZ with my tail between my legs.

Conditions were not was bad as I’d expected: a few jolts of adrenaline, perhaps, but no real Sacred Excrement moments. My vario beeped, so I tried a few circles and found that I was going up. But I wasn’t going up very fast. There was a lot of sink mixed in with the lift, which was hardly surprising with the wind at altitude spilling over the top of the mountain to funnel down the canyon. Worse, that wind was drifting me east, over Rattlesnake Canyon. As its name suggests, this is a place of evil legend, to which I had no desire to contribute.

It was time for the part of my plan that involved tails and legs, so I turned left slammed through a few bumps, and scurried down the spine that lead to the airfield. I’d have measured myself against the day and found myself wanting, but hey, at least I’d measured myself. My cowardice might have caused me to miss some excitement, but I don’t fly to have excitement, I fly for the mental challenge, the physical sensation, the glorious view, and to have fun. I reached the strip with 1200’ of altitude to spare, and wouldn’t you know it: my vario was beeping!

With a safe landing zone just a short glide away, there seemed no reason not to work this lift, hang out, and get a bit more airtime. Besides, I was curious where this thermal might lead. A few minutes later, I was 1000’ higher, curiosity unsatisfied. The lift seemed to be building and the sink diminishing. Would this trend continue? With wind blowing from the north on top of the mountain but from the south on the lake, there was every chance that a ‘convergence band’ might form, with air going up over a broad area.

Soon, other people noticed. “Paul, is that a convergence?” called Robert over the radio.

“Yes!” I replied. “It’s great! I’m climbing through 5700’! Get over here!”

An hour later, three of us were above the level of the mountains, flying broad easy laps up and down the east side of the valley. It wasn’t a very good convergence, as such things go, with a top at 6500’, and some spiteful bits of turbulence to remind us to pay attention. But ambiguous though it might be, this was an unexpected gift on what had seemed an unpromising day, and I was determined to enjoy it. I stayed up until I grew tired – this didn’t take very long, given my recent cold – then headed down.

Landing can be food for thought, particularly when a convergence is nearby. There’s always that nagging concern that the bottom of the thing might push though the landing zone, bringing with it all manner of nastiness. So thinking, I planned an approach that left me with several options if the wind started switching or dust devils started cooking off when I arrived. Would this plan have worked? I’ll never know, for the wind stayed smooth, straight, and forgiving from 500’ all the way down to the ground. Landing, was a pleasure, and the air was sweet with the scent of sage.

We forget the details of these flights. Indeed, on mediocre days such this, there may not be many details to begin with. But we remember our feelings of expectation at the beginning of the flight, the hopes, the curiosity, the delight after each minor success. And years later, when everything else is forgotten, we still remember the sage.

We’re on a roll here!

Friday, June 18th, 2010

Great news: I just learned that the US has made it into the top 50 in science education, narrowly edging out Senegal! With any luck, we should be able to catch up to Greece! We’ve also made it into the top 20 in standard of living, closing in on Finland for that coveted Number Twelve spot! We may remain well behind the Euro area in industrial output and behind Germany in exports, but hey, we’re still the world’s number one producer of ‘coarse grains’! Whatever those are…

All sarcasm aside for a moment… we can do better…

The Royal Navy Termite Service

Friday, June 11th, 2010

Even as I type these words, they are ‘tenting’ my place for termites. The principle is similar to an airship: enclose a space and fill it with gas. Though in this case the gas is poisonous, the result is heavier than air, and the structure is unlikely to fly unless something has gone dreadfully wrong.

Forewarned, I made sure to get Episode 75 ready before I lost access to my primary computer. But I’ll be heading off to the Lassen region for a major flying trip while I wait for the contractors to finish, so it might not get posted until the wee hours of Monday morning. Stay tuned!

Some Mild Physical Exercise

Tuesday, June 8th, 2010

Double time!  Go go go!
Paragliders are much slower than hang gliders, and much less able to cope with strong conditions, but they do have some advantages. One is the ease with which they can be transported. It is quite possible for someone in reasonable shape to hike up the hill with their gear on their back. Not only is this good exercise, it leaves one feeling smug, virtuous, and morally superior to the ecologically challenged slobs who drive up road in a truck.

At least that’s the theory.

In practice, I’d lost interest in smug virtue by the time I reached the 600’ level, and when a truckload of friends offered me a ride, I was happy to hop aboard and be a slob for the rest of the 1700’ climb. On top of the mountain, things looked promising. It was summer, which usually means stable air and unsoarable conditions here in the Bay Area. But the sky was blue, the horizon was sharp, and the inversion didn’t look too strong, which meant there was a chance for a sea breeze front.

We’re all familiar with the concept. Cool air blows in from the ocean, gets heated by the land, and rises, pulling more air in behind it. (I’ve never been quite sure what happens to the air after it has risen – kidnapped by aliens, perhaps.) This wall of rising air is the ‘sea breeze front’. Here in the Bay Area, it forms near the coast and moves inland as the day progresses, passing through Ed Levin Park sometime between 11 and noon. It was 11 now. And did I mention that the air in a sea breeze front is rising? :)

By the time I’d laid out my gear, puffs of wind were blowing up the slope. When I looked from launch, I could see a gaggle of vultures climbing as they circled below me. The only thing missing was a voice from the heavens shouting, “Launch now, you dufus”. (Dufus – noun, plural dufii: a person who waits too long to get off the hill). Switch on my variometer, check my harness straps, tug on the risers to get the canopy overhead, kite it for a moment to check the lines, turn, run, and I’m off.

When the sea breeze front pushes past Ed Levin, the best place to look for lift is in front of the 1500’ hill, so I turned left, flew to the shelf in front of it, and made a few passes. The results were disappointing: a few beeps from the vario, but I was losing altitude. The next place to try was the bowl in front of the 1200’ hill. This wasn’t much better, and I’ve always felt nervous getting low over those trees. It seemed today was not my day, so I shrugged – easier to do while seated in a paraglider harness than lying prone in a hang glider harness – and headed out toward the LZ.

As I passed the end of the 1200’, my canopy surged upwards. I didn’t need a vario to recognize this! One s-turn, another, and the hill was below me. Not bad for a summer day! This lift wasn’t steady enough to keep me up, but surely there was more to find. Below me, I could see the windsock on the 600’ hill flicking back and forth as if a thermal was blowing through. This was worth a look.

Seconds later, I was climbing in a nice well-defined core. Life was good. My vario was beeping, the ground was dropping away, and all was right with the world. Well… almost right. In addition to going up, I was also getting pushed downwind. This can be food for thought on an aircraft with a top speed on a par with a Frisbee.

Concerned about losing touch with the LZ, I turned upwind and found myself just barely moving forward. My smugness at anticipating this situation was counterbalanced by a nagging concern that the situation I’d anticipated was not an unmixed blessing. A bit of patience got me back over the 600’ hill into another thermal. Then I was climbing again… and getting swept downwind… again. I could see a pattern here. I could also see that the wind was picking up. This time when I turned upwind, I was almost stationary.

Skilled pilots notice things like this. I notice them too. I’d had my fun, now I was time to head down for a gelatto. I reached the field with plenty of altitude, plenty of room, and plenty of time to set up my approach. There was a bit of traffic in the pattern, but only enough to keep things from getting boring. And landing a paraglider in a smooth steady breeze is a non-event. After I’d toted my canopy over to the parking area, I got to enjoy another advantage of paragliders. With no battens to pull, wing to fold, sail to furl, or control frame to disassemble, you can pack one away in a fraction of the time it takes to break down a hang glider. Minutes later, I was on my way back to town.

And that gelato was delicious!