Archive for May, 2010

Review: A Great Airship Video

Thursday, May 27th, 2010

The Graf Zeppelin moored to a low mast

Image from Airships Online (http://www.airshipsonline.com/airships/LZ127_Graf_Zeppelin/index.html)


There are plenty of excellent airship sites on the Web. I’ve listed a few in the List of Interesting Things. Many others remain to be discovered. But if you’ve ever wondered what might have been like to actually ride aboard one of the great airships of the 1920s and 30s, check out this superb Youtube video about the Graf Zeppelin. There’s no way of knowing how long it will be around, for Youtube links can be the most ephemeral of things. But it has some superb views of flight operations, the sound of those engines is priceless, and that couple in their stateroom with a bottle of wine is a glimpse of an entirely different aviation experience from the one we endure in the back row of a 747 Model 400 en route from Amsterdam Schiphol to SFO.

Big

Sunday, May 23rd, 2010

It was another one of those days we been stalking all week, watching the weather forecasts, checking the synoptic maps, tracking the low pressure system as it developed to the northwest. And the sky that morning looked about right: crisp, clear, and bright, with a layer of high clouds sweeping in from the west. The report from the automatic weather station on top of Monument Peak was as we’d expected, with low temperatures and wind from the west-northwest. But… peak gusts of 31 MPH? What was that all about?

It was clearly too windy to fly, but none of us really believed that report. Surely the weather robot was wrong. With the kind of forecasts we’d been seeing, wind that strong just didn’t make sense. So we gathered in the parking lot, consolidated our equipment onto the Crimson Brick, my ancient, venerable (and white) Jeep, and drove up the hill to discover that it was ripping.

In situations like this, all you can do is laugh and wait. Well, perhaps ‘laugh’ isn’t quite the right word. ‘Nervous giggle’ might be more accurate. But conditions were so ridiculous that we just had to stick around to see what would happen. After an hour had passed, the peak gusts were down to 27 MPH. Two hours and they had had dropped from wildly absurd to merely intimidating. Since Mission Peak is fairly tolerant of high wind launches, we decided to give it a go.

I punched off first, prepared to get hammered. I was not prepared to find myself going straight up at 1000 feet per minute with a ground speed of almost zero. The air was smooth, with hardly a trace of turbulence, but the winds aloft were well over 20; so strong that if I slowed down to just above stall speed, I would surely have gone backwards. The thermals were unworkable — shredded to pieces by the wind. In their place, vast convection cells were sweeping across the East Bay, feeding titanic rafts of cumulus clouds miles across. One expects this sort of thing in the high desert. Indeed, it’s part and parcel of the high desert flying experience. To find it next door was unsettling, like coming home to discover that your girlfriend has set up an axe-throwing target in the living room. (THUNK! “Hi honey, you’re home early. How was your day?”)

This was just too weird to miss. Also, I wasn’t in a terrific hurry to attempt a landing in these conditions. So thinking, I set out to explore. (“Cool, an axe-throwing target! Hey, you got another one of those axes?”) It was a character-building experience. Staying up was easy, but one had the feeling of being in the presence of vast invisible forces that wouldn’t tolerate disrespect. As a friend put it, there was never a moment when you could relax and go sight-seeing. But there was no treachery to the day. Whatever hazards it had to offer were out there in plain sight for anyone to see. Getting too close to the clouds would be bad, so don’t get close to the clouds. Getting behind some terrain would be a nightmare, so stay in front of the terrain. Landing as a gust blows through might be a bit too exciting for words, so land between gusts, and save your words for the blog post later :)

I stuck it out for an hour, then went down to hang out in the lift above a hill near the landing zone. After five or ten minutes of excellent upper-body workout, a cloud blocked the sun, the lift began to fade, and I saw the windsock in the landing zone start to droop. This was my chance. Stuff the control bar, dash out over the LZ, fly a quick left-hand pattern, dive into ground effect, level out, muscle the glider to the ground… piece of cake!

The next day was even better :)

Oh, the Pun!

Tuesday, May 18th, 2010

Roger, Manatee, you're go at throttle up.
A friend forwarded this one to me yesterday. Apparently it’s all over the Web, on so many different sites that I’ve found it quite impossible to track down the original author. Appalling, isn’t it? And darn it, why didn’t I think of it first? :)

In the aftermath of the Manatee disaster, the decision was made to fill all future aquatic mammals with helium. Which is why dolphins talk in such high squeaky voices…

A Review – Nanette; Her Pilot’s Love Story

Thursday, May 13th, 2010

The first time I saw Edwards Park’s book, Nanette; Her Pilot’s Love Story, I thought, Ho hum, another WW-II fighter pilot’s memoirs. Another collection of scenes like, “Ah saw ‘im comin’ up, so Ah pulled hard left, rolled inta his six, an’ gave him a burst from mah quad 50s!” As a pilot, I’ve grown suspicious of that sort of thing. Did real people actually think that way? All the time? With never a moment of doubt or uncertainty? And were all they so finely focused on the technical details of combat aviation that they never once played around with their aircraft, or glanced at the world outside the cockpit and thought, ”Hey, this is pretty cool!”

Then I took a closer look at the cover of Mister Park’s book and thought, Huh? That’s a P-39? Those were arguably one of the worst planes in history! And the author used the word ‘love’ right here in the title. I had to check this out! Opening to beginning of the first chapter, I read

”Nanette was an airplane. That should be made clear right at the start. She was not a very good plane; actually she stank. But she did a lot for me, I realize, as I look back on her.”

You don’t find treasures like this every day!

Edwards Park writes about the transition of a fairly ordinary man into… a fairly ordinary man who just happened to find himself flying a high performance single-seat combat aircraft in the Pacific Theatre during the early years WW-II. Rather than attempt to impress non-pilots and civilians with his coolness, bravado, and competence, he writes about his actual reactions to what, for a fairly ordinary man, must have been a far from ordinary experience. One of my favorite examples is Park’s description of his first air combat.

“There was a sudden strange sound, a tinny rattling like a barrel of hail on a metal roof. Puzzled, I scanned my instrument panel and saw every engine gauge in the green. I looked out at my wing and then looked again. Something odd there. The smooth contour of my right wing was broken by a sort of cratering effect. What the devil could that be?”

“It was suddenly quite clear what it could be. Bullet holes, that’s what. Those low-life bastards in that bomber had been shooting a machine gun at me, for Christ’s sake! What a savage dangerous thing for them to do!…”

I won’t say more lest I spoil the book for the rest of you. But I urge anyone who’s looking for a superb aviation story — a tale of the Real Stuff rather than the Right Stuff — to check out Nanette, by Edwards Park.

Glory, Ignominy, and Fine Pasta

Tuesday, May 4th, 2010

It was a typical post-frontal day at Mission Peak. A low pressure system had pushed through the night before and now the air was cool, the wind was from the northwest, and the sky was filled with an armada of clouds – good soaring weather if we were patient. On days like this, the air at Mission follows a predictable pattern. Morning conditions are light, with moderate winds and thermals. Sometime around 1 PM, a big flush cycle pushes through that can send the careless, impatient, or over-ambitious pilot down to the LZ. After it passes, conditions build and the lift grows stronger, with booming thermals that give way to ridge lift as the wind picks up and shifts the north towards evening.

Like any pattern, this one can vary, and so it was today. The wind seemed a bit stronger than usual, and threatened to turn north, which could mean more than the usual amount of sink. But it was spring, when thermals are big and much is forgiven, so I had high hopes for a good flight.

Launch was easy, like hopping on a bicycle for a ride down a hill. Seconds later, my variometer began to beep and I began to climb. One s-turn, two, and I was high enough to circle. A few cautious 360s and I was above launch, with room to explore. This was one of those days when thermals were marked by clouds. As each column of rising air pushed above the altitude where temperature and dew point came together, the moisture inside condensed into a billowing cumulus – a sight that brings joy to any soaring pilot. Unfortunately, it was also one of those days when the wind was strong enough to blow those thermals apart. The combination was challenging, and it wasn’t always easy to stay in the lift. It took me some time to figure out where to look and to sort out the right combinations of airspeed and bank angles to use, but at last things began to come together and I was able to fight my way up to cloudbase.

By now I felt that I’d taken the measure of the day. Rather than hang around over the peak, I decided to try the standard challenge from Mission and fly four miles south to Ed Levin Park, turn around, and fly home. The trip south – downwind – is usually easy. The trip home can be a bit of a poser. Recognizing this, I began my flight conservatively. Rather than leave lift, lunge toward my goal, and hope to find more lift along the way, I drifted with each thermal, letting the wind push me south. By the time I reached the Ed Levin LZ, I was at 4200’ – well above the 3200’ that usually guarantees getting back to Mission.

With so much altitude to play with, it seemed the trip home would be a piece of cake. And when I did turn back north, the headwind was no more than I’d expected – 10 MPH at most. But gosh I was going down fast! My variometer dial was offscale low, and the ground was coming up at me in a rush. In a matter of minutes, I was down at 2500’, even with the tops of the mountains. Then I was below ridge level, still sinking like a stone. Mission was out of the question, and if I got any lower, I might even lose touch with Ed Levin. This would not do at all! Irate, annoyed, I headed out over a quarry to the west. I would not be so easily defeated!

Work, sweat, and a bit of cursing got me back up to 3200’, but by now I’d drifted south again. My second attempt to head north was even less successful than the first, and I only made it half a mile before I was down below ridge level again. It was clear I was going to be forced down at Ed Levin – an ignominious fate after I arrived there so high. It was also clear that the landing was going to be nasty. The same wind that was ripping the thermals apart was going to fill the LZ with turbulence. I’d landed in these conditions before, and it had never been a terrific amount of fun.

With this in mind, I tried to time my descent. My plan was to reach the ground between gust cycles, when conditions were reasonably sane. And as I set up my approach, it looked like I’d pulled it off. But the Weather Goddess laughs at our plans. When I turned onto my downwind leg, I looked over my shoulder to see a vast cloud shadow looming behind me. A huge convection cell had formed to the north and was sweeping south to engulf the field.

At times like this, all you can do is grit your teeth and prepare to get hammered. Laughter helps, and conditions were so perverse that I just had to laugh. Base leg was an empty gesture, for the air was so turbulent there was no telling what my glide angle would be like. I turned final, crossed the trench, and saw that the wind streamer I’d chosen as my target was flicking back and forth 90 degrees every few seconds. This was not going to be a landing, it was going to be a melodrama! And indeed it was.

As I carried my wing off the field and over to the breakdown area, I realized that I was not alone in my ignominy. All told, four pilots had tried to from Mission to Ed Levin and back. All four of us sank out at Ed Levin. And all four of our trucks were back at Mission.

Oops.

Like all retrieval problems, this one was eventually solved. And like all good recreational flying expeditions, this one ended at a fine restaurant! The days since then have been uneventful, for a high pressure system has moved in, shutting down the thermals at most of our sites. But when I look at the National Weather Service synoptic maps, I can see another low pressure approaching from the west…