Cross-Country Flying 101
- edited with permission for Hang Gliding
By and with permission to reprint from Will Gadd
, <=== The Paragliding Specific version is posted here from http://www.gravsports.com
and his http://willgadd.com/
- with input from many top pilots who patiently and repeatedly answered the question, "What's important for successful XC flying?"
The first step toward successful cross-country flying is simply leaving the security of the local hill and venturing out into the wide world.
It doesn't matter if a an XC flight ends one or 100 miles from the start point, but that it was attempted.
For every flight that ends in a new LZ requires the same basic set of skills:
An appreciation of local conditions, constant analysis of immediate air conditions in flight and, above all else, a safe place to land at the end of a flight.
The planning of an XC flight is often as or more important than the actual flight.
For example, task committees at competitions set tasks every morning armed with the best information they can gather on wind speeds,
possible cloud development, barometric pressure, satellite photos and every other scrap of information they can muster.
As your own task committee, get as much information as possible before setting your task.
There are also days that simply aren't good for going XC; rather than forcing a day to meet your goal, set your goal around the day.
Assuming the day looks reasonable for XC flying (no thunderstorms forecast for noon or other large-scale problems),
a good map of potential routes is essential, preferably one with airspace restrictions, mountain ranges, major roads, powerlines, railroads and other feature visible from the air.
Fred Wilson wrote:Plan your routes ahead of time at home using XC Planner.
- just insert your nearest city, select the number of turn points you plan on using, then hit "Reset." Off you go. Have fun with this great planning tool!
Then generate kmz files to insert into your GPS using WayPoint Planner.
Both thanks to Tom Payne.
Information from any local source about XC flying always has to be examined with an eye toward who is giving it,
but I like to pump local HG and PG pilots about where they have been and what happened.
For example, they may know that a local canyon turns into a death venturi about noon every day, as well as good thermals or areas where the powerlines make landing all but impossible.
After establishing the general conditions for the day and area, the next step is to set some kind of goal and state it: "I'm going to fly from Aspen to Leadville."
Even if you don't make your goal, you'll still learn something about XC flying, while you're guaranteed not to learn anything if you're boating around with 20 other pilots at the regular hill.
XC flying in a group has advantages, but it's often difficult to get anyone to go with you.
Break the herd mentality and go anyhow, but try to tell someone generally where you're going in case you don't show up later.
In many states, a fishing license covers rescue costs for the purchaser; it's a small investment that can go a long way.
Because (EDITED) most of us hang glider pilots tend to go upwind rather poorly, so
upwind flying should be kept to a minimum.
Understanding local wind conditions such as the difference between morning, afternoon and evening valley flows versus predominate winds aloft can be critical.
Using Aspen as an example, the wind usually flows down the valleys in the mornings and evenings and up the valleys in the afternoons, often in direct opposition to the winds aloft.
If you're flying XC in valley terrain, generally plan your flight to go with the wind aloft, but realize that the wind low in the valleys may be very different.
The windward side of a high mountain ridge may well be the lee side of a ridge facing the same direction in the valley and vice versa;
it usually only takes getting rotored hard
once to appreciate this phenomena.
Say the wind is out of the West, and you're flying a valley that generally runs from south to north, with the top of it at the North end.
It's evening, you're getting low and returning from a long XC, and you're coming down the valley from the north.
A long spine sticks diagonally out into the valley from the East side, it's in the sun, and it's about a perfect glide from where you are now.
You know the wind is from the west aloft, so you head for southwest side of the spine, arrive there very low and get hammered because the valley wind,
with a strong valley flow, is pumping down the valley, essential from the North. You get rotored into the trees, it gets dark, you have a lousy walk.
Fred Wilson wrote:Advance knowledge of areas where lift is commonly found on XC Routes should be kept mentally on file. These include
a) areas where convective winds meet (example half way to Vernon from King Eddie, flying directly NW down the center of the Lavington Valley)
b) areas where convective waves propagate downwind from mountain ridges.
Examples of where convective wave propagation helps soaring can be found at
Mara, the West Face of Vernon Mt and Oscar's site at Savana.
(All these sites are also known for good wave soaring in flyable wind conditions which come as no surprize.)
Examples of where consistent sink is always found is where the area is in the down flow of wave propagation.
- Local examples includes the ridge on the XC flight from Mara heading south from Enderby to Armstrong and thence Vernon,
and especially on the XC route west from the west facing ridge a few Km east of Boleen Launch all the way to Grandview Launch at the North end of Vernon's Okanagan Lake.
Although it may seem morbid, I repeatedly analyze my current XC flying situation by asking myself, "What's the worst possible thing that could happen here?"
This tool helps me choose what I want to do in light of what could kill me.
If there is a set of high-tension wires between me and my next thermal source, then it's key to get enough altitude to clear them.
Every flight has numerous situations that could be lethal, but I think being aware of the possible dangers is critical to avoiding them.
For example, scratching valiantly all way down to an LZ is a good effort, but not if it puts the pilot too low to glide to a safe LZ
(funny how trees tend to get bigger when you have to glider over them).
Understanding the dangers in every given situation also forces the pilot to have a plan.
I like to think of XC flights as a series of small steps that connect individual points into a line ending at a goal.
If you fly with a plan and an attitude of success, you won't get bogged down in indecision until you waffle your way to the ground.
Decide what you think will work and then try to do it; if your plan doesn't work you'll at least learn something about what not to do instead of suddenly being on the deck for no good reason.
Once in flight, always have an LZ you can effectively use within an easy glide.
While XC gods can get away with diving into areas without LZs, it's not a good plan to start with.
Once you gain altitude and go on glide to your next thermal source (cloud, ridge, whatever), switch from your first LZ to a new one.
This process will soon become instinctive, but until it does LZs define XC flying.
Like driving an unfamiliar road at night, safe XC flying demands an extra safety margin for unexpected conditions.
An often-heard XC mantra goes, "When you're high, fly the sky, when you're low, fly the ground."
Clouds are usually the best indicators of lift, so try to get to cloudbase and then work from cloud to cloud,
- paying attention that the cloud you're shooting for isn't developing extremely rapidly or decaying.
"Fly the sky" just means flying from one cloud or cloud street to another, based on how the clouds are developing or dissipating.
It's hard to make the switch from looking at the ground for thermal sources to the sky for lift, but the paradigm shift is essential for long-distance flying.
While thermaling up under a cloud, remember to look at the cloud regularly;
it's amazing how quickly you can be hundreds of feet below it one moment and totally whited out the next.
Plan your last turns to take you to the edge of the cloud, and leave a safe margin so you don't get sucked into the cloud.
If you do get sucked into a cloud, radical spiral diving is often the only effective method of descent in strong lift.
As I approach the bottom of a cloud, I like to dump trim, step on the speed bar and, if necessary, pull big ears while blasting out from under it.
If the lift is extremely strong, get a bearing on your compass before you hit the edge of the cloud so you can navigate out the side in a worst-case scenario.
While it's important to fly the sky, sooner or later you either end up low or flying on a day with no clouds.
First, while you are high and on days with clouds, try to connect the cloud to the feature or area that's causing the cloud.
Try to find patterns to thermal development for your area for particular types of days; on days with strong winds, thermals more often come off spines;
Low-wind days generally result in thermals from bowls, while areas where multiple ridges come together are often very reliable.
While every pilot has theories on what works for thermals and what doesn't, it's essential to develop your own models and check their accuracy, because in flight you've only got yourself.
If you get low, pick a likely spot in the sun, one that meets all your mental requirements for what a likely spot is, and wait for a thermal.
If you get to a suspected trigger point and find no thermals but zero sink, wait and things will probably get better.
You wouldn't leave your local site if a thermal didn't come through in thirty seconds, so treat your likely thermal spot the same way.
Ridge soaring is one good but often overlooked trick for staying in the game while flying XC;
you can use valley wind flow on a ridge to soar until a thermal comes through, just be careful to establish wind direction early.
Watch the vegetation, dust and trees to determine local wind direction.
For example, dry grass leans over in line with the wind, while leaves will flip upside down with the wind.
In addition to establishing wind direction, these changes often indicate that thermals are lifting off near the disturbance.
Dry, dark areas of ground produce better thermals than wet, lighter-colored areas, with moisture content more important than color.
For example, dark, dry fields are usually very active thermal generators while green grass seldom is.
In general, height is safety, both in case you put your wing through unexpected maneuvers and also so you don't land early and watch all your friends fly over your head at cloudbase.
Be patient with the day while flying XC, which means waiting for good conditions to develop, and also flexible, meaning that it's not only OK but often imperative to modify your goal as the day changes.
Flats generally take more time than mountain ridges to start working, as do deep valleys or shady hillsides. If there's no development for the next ten miles of air, get under a cloud and just wait for the sky to improve.
Likewise, unless you're at cloudbase, don't fly over shady areas. Thermals come from the sun, so no sun almost certainly means no thermals, no matter how much try.
Fight to the bitter end to stay up, but always accept your fate early enough that you can still make a good landing in a safe LZ.
Allow more room for error than you would at your local LZ; think about how carefully you looked at your local LZ the first time you flew it,
then think about having to establish the hazards and problems of a brand new LZ from the air.
Look at the ground for strings of telephone poles (visualize the wires running between the poles both in straight lines and at right angles to unseen poles),
ridges that could cause mechanical turbulence, drifting smoke, wind on lakes, dust blowing and any other clue you can find for wind direction and hazards in your LZ of the moment.
When choosing an LZ from the air, pick one shaped like a runway rather than one shaped like a square.
All other things being equal, long and narrow is better than short and wide because you can line up on final and not worry about needing to turn near the ground if you get unexpected lift or sink at the last minute.
I like to land fast rather than boating around waiting for something bad to happen, especially in strong mid-day conditions.
If I'm landing in a baking field, I usually come in hot, only flaring as my feet almost hit the dirt.
I've seen too many accidents where people come into an LZ and float aimlessly around, until they get hit with a strong thermal cycle or dust devil close to the ground.
Although I'm not sure why, it seems like landing in a field often precipitates thermals out of that field.
Flying a wing in too fast or too close to stall is extremely unstable. A good controlled flying speed is more likely to simply slam through small, violent thermals than be slammed by them.
If you’re committed to an LZ and you suddenly see trees or powerlines in your path, it's better to land downwind or crosswind, or force stall your glider to the ground than to hit most obstacles in LZs.
If the electricity doesn't kill you the fall out of the power lines will.
Remember to radio your potential landing position while you still have a line of sight or communication with other pilots in the air.
Your signal goes much farther from 500 feet above the ground than it will once you have landed.
Equipment for XC flying
- A wing you feel totally comfortable on. XC flying puts enough demands on a pilot's skill without having to learn how to fly a difficult wing.
Competition wings do have good glide and speed, but it's more important to trust your equipment in the lee of a big ridge or while landing in a tree-encircled LZ than to glide a little farther.
- A map of where you're going and where you could conceivably end up.
Most hunting stores sell these nifty clear map holders you can strap to your base tube.
I put my cheap compass in this clear case so I can navigate out of clouds should I get sucked into one.
- A first aid kit fortified with industrial strength painkillers, a loud whistle and industrial safety scizzors that can cut a victim out of their harness.
If you crash a long way from a road, your only chance may be to take good painkillers to help prevent shock and keep you clear-headed enough to talk to the rescue helicopter.
- Radios, both yours and the chase crew's, should have adequate batteries. I like to carry a spare clip of alkalines that I can plug into my radio in an emergency.
Agree on a frequency and write that frequency down so that if the dial gets pumped you can remember which channel to use.
- A GPS is a great tool for judging wind speed, landing position, air speed and distance.
Two GPSs are especially handy when flying over featureless areas, one for you and one for the chase vehicle.
"I'm over the brown field" generally won't get you retrieved, while Lat. and Long. coordinates will.
- Cell phones are increasingly useful for retrieval, especially if you fly with a list of numbers for all your flying buddies with cell phones.
- Water and food, especially water. You can walk two or three days without food, but you're dead without water.
- Matches, a signal mirror, a space blanket and flag tape are also all useful.
Bio: Will Gadd flew more 1000 total XC miles on his Edel Energy during the '95 season, and hopes to fly many more this year.
The opinions above are gathered from his own experience and comments from many other pilots.
Read about his X-Factor XC Record flight
through Tiger Country from Vernon BC's King Eddie Flying site to Invermeme BC here
. and here: http://gravsports.com/Golden_Canmore.htm