# XC Tutorial: Slope soaring

Often the pilot finds himself in the zone of thermodynamics, where he needs to start or continue the route.

A thermodynamic is formed at the illuminated slope if, moreover, the wind rushes onto this slope. This, on the one hand, looks like a speaker - it holds only near the slope. You can often fly from side to side and stay at about the same altitude. Difference from the usual dynamic: flying as in the dynamics, you will then lift, then lower. This is because a thermodynamic consists of bubbles lying on a slope, and downflows between them. Often, to stay in thermodynamics, you must constantly make efforts: to find and process flows. To leave thermodynamics on a route, flight technique in dynamics will not help you.

If you want to gain height, the flows on the slope must be treated with spirals. In this case, as part of the turnover you have to fly into the slope. This contradicts all instincts gained during previous training and flights. In the morning it shrinks, and a wave of fear rolls up to the throat. And indeed, the technique is quite dangerous. But nothing can be done - this is the only quite effective technique to go on a route. An alternative is to handle the flows with eights. I will say this: if you find such a wide stream that figure eight fits into, you can process it with any other geometric figure. All these considerations do not apply to the case when we easily rise in dynamics above the peak. In this case, you need to go forward, look for a stream there, and fly away with it, trying to gain maximum height, until a strong wind blows you up the hill. Unfortunately, a bad speaker is more common. However, I prefer strong currents and weak winds to weak currents and strong winds.

Look at this picture. It reflects the main trick of stream processing at the slope. The fact is that the ascending spiral will fit in where the circular trajectory will stick into the slope due to wind drift. You are carried down a mountain, but you rise, and the earth recedes. I usually do this: I go along the slope in search of a bubble. Feeling the rise and waiting 2-3 seconds, I spin it from the slope. I make a half-turn. If everything is normal and the variometer continues to squeak, I wrap it on a slope. Turning to a certain angle, I make the final decision: if the lift disappears, I stop spiraling and turn away from the slope. If the rise remains, I complete the turn. Recently, I noticed that this maneuver no longer excites me as much horror as before. The eye meter is trained to evaluate the distance to the terrain. If you can see that I fit exactly - why be afraid?

There is one more important thing. Often the flow at the slope behaves as follows:

Catching the stream at point A, you can quickly get to point B. But it does not rise higher there. We have to move to point C, not having a margin of height above the relief. But at point C, the flow breaks away from the surface, and with it, you go vertically under the cloud. If you do not know this feature, then it may seem that at point B the stream has ended. The pilot will fly along the slope to look for another thermal flow, and he will not go on the route. Moving to point C from point B can be scary since the height is small, and in the case of a drawdown, you can not reach back to the bend. I recommend that you go to point C. You only need to go together if you are lifted all the time, or at least supported. If suddenly you begin to lose height - turn around and go to the bend before it is not too late.