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Analyze a blown launch

Postby JoeF » Thu Oct 25, 2018 9:44 pm

Mtich G shares his:
My worst crash ever...Hangliding
Video.
Also, this is being studied elsewhere.


Mitch G
Published on Oct 19, 2018

This is still hard for me to watch. This happened on the 5th of OCT. It was a combination of a lack of proficiency, wind changed directions as I took the first step forward (glider yaws), strong conditions, wing tip caught a bush, and not far enough forward on the launch ramp (clean air to both wing tips)
I can only be thankful that I was not seriously injured. You can see the few seconds after impact I didn't move...but I dont remember doing that. My neck and back were very sore for about a week but I feel almost fully recovered after 2 weeks.
I dont know If I will fly hangliders again. I dont fly them enough to stay current and fly at difficult launch sites with strong conditions. I have not repaired the glider. If you have interest in buying it feel free to send me a message.

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Re: Analyze a blown launch

Postby Bob Kuczewski » Fri Oct 26, 2018 1:57 am

The "tight left / slack right" wires were a bad place to start. It might have been better to move further down the ramp. I also noticed the instant reaching for the base tube and trying to kick into the harness right away. I see a lot of pilots doing both, but the first job should always be flying the glider safely away from the hill. But I'm not sure if anything could have overcome launching with that much differential lift. It's very fortunate that he wasn't badly hurt or killed.
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Re: Analyze a blown launch

Postby JoeF » Fri Oct 26, 2018 5:17 am

126.JPG
126.JPG (100.8 KiB) Viewed 5412 times

WingIntoBrush.JPG
WingIntoBrush.JPG (23.07 KiB) Viewed 5412 times


The matter worsened with the right wing tip catching the shrub.
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Re: Analyze a blown launch

Postby Rick Masters » Fri Oct 26, 2018 5:39 pm

One of the dumbest launches I've ever seen.
I would never launch like that. Never!
You never even flew the glider on your shoulders!
You were in a turn the moment you decided to run.
Of course you crashed.
You even had a wireman and didn't use him.
You never gave the right wing a chance to take the air.
You had no respect for the glider.

You had all the time in the world to do it right.
You could have stepped ahead of the bushes so your wingtips could have clean air.
You didn't.
You could have stood there and flown the glider for a while,
Getting a feel for the wind direction and pitch.
You didn't.
Never once did you find the direction of the wind.
The poor hang glider never had a chance!
I feel sorry for that nice glider being in your impatient hands.

What is your big hurry?
Did you have to catch a bus or something?
You made that glider crash.
Wishful thinking has no place in flying hang gliders.
The glider has to be flying before you run.
You have to allow it to dance in the wind coming up the slope.
It's joyous. Don't be afraid of it. Embrace it.
You have to let the wing find its point of balance.
You know you have it when you can turn the nose a little bit and one wing wire goes tight,
then turn it the other way and the opposite wire goes tight.
You could have learned a lot if you had walked out to clean air with your wireman holding the nose.
You could have stood there for ten minutes, flying the glider on the ground.
It looked like a really nice day to me.
Definitely a one-step takeoff.

There is no excuse for this accident.
You own it. You made it happen.
I don't care of there are 50 guys behind you.
You never launch until you're comfortable and the glider is dancing and eager and flying straight and level in your hands.
You had good air a few steps in front of you and you didn't feed it to your glider.
You starved it and then you broke it.
What were you thinking?

On gusty Gunter launch in 1981, I asked my friend Klaus Kohmstedt, "Are you worried?"
"To take off? No," he replied. "I control everything up here. I can choose the moment when everything is right. It is the landing I worry about."

Until you become one with your glider, stay away from the great sites.
They are great for a reason.
They are where men become eagles.
Not where turkeys become eagles.
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Re: Analyze a blown launch

Postby Bob Kuczewski » Thu Nov 01, 2018 10:50 am

FYI, Tad did a good frame by frame analysis of this launch on his site:

http://www.kitestrings.org/viewtopic.ph ... 170#p11143

From the earliest moments of the launch, the pilot was fighting to keep the left wing down. That's a loaded spring ready to release. He should have backed off right there and started again.

The analogy to USHPA is striking.
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Re: Analyze a blown launch

Postby Frank Colver » Thu Nov 01, 2018 7:24 pm

Right on, Rick!

Look at my pre-launch action at POTM. The glider was flying long before it carried me aloft.

https://click.email.vimeo.com/?qs=fbede ... 7f16246f98

Joe Greblo once told me at Dockweiler: " You are flying the glider well after launch, but you need to fly it before and during launch".

Excellent advice, worked well at POTM, Utah.
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Re: Analyze a blown launch

Postby Rick Masters » Thu Nov 01, 2018 8:30 pm

Yes, Frank. And for any one else reading,
the single most important action in hang gliding is the step off the ground at takeoff.
Some think the flare at landing is most critical. It's not.
Because at flare you are losing speed. If you crash, you crash while you are slowing down.
But if you screw up at takeoff, particularly in a stall/sideslip, you are gaining speed.
Not good. You can die. Many have.

Of course, your glider must be checked and sound, you must be hooked in, etc.
But in terms of action, the glider must be flying.
If the glider is flying at that moment, you will be safe.
The hang glider will carry you away.

When I read "My worst crash ever," I cringed.
How many has he had? I wondered.         :shock:

While I have some sympathy for those who crash at landing,
there is actually little excuse for a crash at takeoff.
Launching in ridgelift should be a breeze, if you will excuse the pun.
If the air is turbulent, you are attempting to launch from a poor spot.
Even launching in thermal conditions can be done safely.
Because much of my mountain flying in the 1980s was done alone,
I had little option but to learn to launch safely every time.
And I did, with bit of insurance, provided to me by Rick Rawlings: keep running.
Go fast. Build momentum. Pull that bar in a little bit and dig.
Your speed becomes control authority as you leave the hill.
Run in the air as you lift off. None of this primadonna falling into your harness stuff.
Launching a hang glider is serious business.
Launching at 9,000 feet is even more serious.
Run! Keep running, just in case some little bit of down air is headed your way.
Run! Once in a rare while it can save your a**.
Just a few more silly-looking long steps in the air, then you can rotate.

For reading thermal cycles, I refer you to "Explorations with the Thermal Snooper."
https://www.ushawks.org/forum/viewtopic.php?f=56&t=283

Image

...Fall had come to the Owens Valley, bringing the smooth north winds and the big, lazy thermals that would quietly disappear at the level of the highest peaks. It was a time to relax, a time to come down from the intense highs of the cross country season and again enjoy flying for flying's sake. The advanced pilots had gone home, burned out, sated. The intermediates worked the ridge lift of their local hills and longed for the next summer to hone their thermalling skills. Some day they would discover the Owens Valley in the Fall and Spring. But for now, as always this time of year, I was alone.

The peak I favor in Fall is Mazourka. It stands out from the northern Inyos in the path of the valley winds. In the summer, long and shallow Santa Rita Canyon gathers the south wind and guides it to the summit. It was at the head of this canyon I had located the 1984, and part of the 1985, Owens Valley XC competitions. But in the Fall and Spring, the north wind collides with Mazourka, rushing up its steeply cascading flank to offer thermal-rich ridge lift, while ten miles to the north Tinnemaha Reservoir indicates the wind strength and direction in the valley.

From the summit at 9140 MSL (Measured from Sea Level) the view is inspiring - all the more so because Mazourka is the only mountain launch in Owens Valley to offer an unobstructed view in all directions. Just east of Mazourka, the main spine of the 11,000+ MSL Inyo Range marches north to descend into the rolling hills of Westgard Pass, then rises again as the great White Mountains. Westward, the raw granite spires of the Sierra Nevada rear from the valley floor to form an unbroken wall, reaching over 14,000 feet. Between these awesome ranges the boulderstrewn alluvium, pockmarked by magenta cinder cones and scarred with tortured fields of dark lava, is cut by narrow, brush-choked streams that gurgle from every canyon only to be seized by the Los Angeles Aqueduct, leaving the meandering Owens River to struggle pitifully southward alone in a futile attempt to moisten the red eye of Owens Dry Lake.

The day was extraordinary. A broken cloud street of the classic type with flat-bottomed, underdeveloped cumulus had established itself along 100 miles of the Inyo-White range. Cloudbase beckoned a mile above Mazourka. Across the valley, the crest of the Sierra was laced with a narrow and continuous band of cloud. Only the tallest snowcapped peaks pierced the cloudtops.

At the north launch point on Mazourka summit the wind was light to moderate (5 to 15 mph), driven from the north but veering due to thermal cycles, resulting in a predominant northeast wind with an occasional west. But every few minutes the wind would straighten and hold north, the optimum direction for launch, for 20 seconds or longer. Several gaggles of ravens and hawks, the lords of Mazourka, drifted on thermals above me. I decided to set up.

The glider I'd chosen for this flight was a Pacific Wings Express "Racer," a fast European design that had carried me 178 miles great circle distance from Horseshoe earlier in the season - to my knowledge, the ninth-longest hang glider flight ever made. My hook-in weight of 215 pounds resulted in a wing loading of nearly 2 pounds per square foot, and therefore demanded an aggressive thermalling technique with tight turns centering the core for effective altitude gains. Because of this, I felt the Express would be ideal for testing the Thermal Snooper.

I clamped the Snooper to my instrument mount and turned it on. It's "beeps" and "boops" were easily discernible from the "chirps" and "buzzes" of my variometer. I assumed the Snooper would quiet down after the circuits normalized - but it didn't. That was my first surprise.

Instead of remaining silent like my vario, the Snooper was giving me a running commentary about the quality of thermal cycles rolling through launch. When a freshening breeze began to tease the first flag 100 feet down the mountainside, it would begin to "beep" hesitantly. Then as the nearer flags became agitated, the "beeps" would increase excitedly. If the thermal was centered and all the flags stood out from the north, the Snooper would fall silent. But when the flags skewed off to the east or west as a thermal passed to the side, the Snooper would immediately follow its "beeps" with a series of low "boops."

Fascinated, I stood at takeoff for 20 minutes. For each cycle that passed through, the Snooper gave an indication of it's size by the duration and frequency of it's "beeping." A few "beeps" meant a small, short-lived thermal. Many "beeps" told of the arrival of a large thermal. At some point during each thermal's passing, the Snooper would begin to "boop" - a few "boops" for small thermals, many "boops" for large thermals. It was obvious that these "boops" warned of the "downside" of the thermal's cycle.

Years of observation have led me to attribute the majority of takeoff accidents in thermal conditions to pilots launching into the tail end, or down-side, of thermaI cycles. It took a lot of practice to read thermals accurately, and some pilots just never became adept at it. Now here I was with a tiny instrument clearly identifying both the up and down sides of each cycle! I was impressed. Even if the Thermal Snooper didn't do anything else, it promised to make mountain flying a lot safer.

But surely, if it could read thermals on the ground, it could read them in the air. I eagerly shouldered the Express. When the Snooper announced another large cycle, I was airborn by my fourth step. The air was straight, smooth, and lifting. The vario began "chirping." The Snooper fell silent.

When I am first to launch, I never attempt to work the occasionally treacherous takeoff thermal. It has never proved necessary for me in the Owens because there is always another just as good nearby. So I flew fast and straight away from launch - and out of the thermal lift. The vario went silent and the Snooper began to "boop" just like it had on the ground during a down-cycle. With the gentle ridge lift helping sustain me, I turned to seek out the resident "thermal snake" on the knife-edged western shoulder of Mazourka Peak...
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Re: Analyze a blown launch

Postby Bill Cummings » Thu Aug 01, 2019 8:39 pm

I checked Tads correct and sometimes incorrect analysis along with the usual extraneous
personal and derisive attacks concerning Mitch’s crash video.
Tad was helpful correcting some of the poor sentence structure that I put in a post.
Some of his incorrect assumptions can rightfully be attributed to the fisheye lens
and Tad not being familiar with the launch site and the effect that the cliff has on the
wind. Also his misidentification of the people speaking. Tad appears to believe that the
voice saying it would be unsafe to move down the ramp knows much about the safe
way to launch a hang glider. Another thing, the guy wearing the blue shirt was not
Hadley. Tad’s castigations were misdirected and unjustified. Tad simply had
some of the players mixed up. This makes speaking ill of someone all the
more egregious or understandable depending on who it was coming from.
If Tad had stuck with the frame by frame analysis it would have yielded
fewer analytical errors.
Even through the fisheye lens may leave some with the idea that there
is a level area behind the ramp there is not a level area. It is down hill to the start
of the ramp for about 15 feet. The Little Rock’s (damn auto correct.) can easily cause
a pilot to slip and lose pitch control moving to the ramp. I’ve already made my
analysis in the comment area of the YouTube video.
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