Questions tagged [thermals]

Columns of rising air that are formed on the ground through the warming of the surface by sunlight, used by gliders to gain altitude

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Can new thermals be generated above a cloud layer?

Thermals rise from the ground due to uneven heating from the sun, then stop rising once they start condensing into clouds. My question is can new thermals be formed at the top of this cloud layer? I ...
rhobot's user avatar
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2 votes
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Is there any evidence that birds use thermal currents generated from highways to glide? [closed]

I am looking for an article on the subject matter of birds using thermal currents generated from highways to glide. I know I have seen and read about this before but cannot find any research on the ...
Fractal's user avatar
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What is the nature of the glider's vario lag?

I learned that glider's vario reading lags behind the vertical speed of the airmass. For example, when flying a steady circle and having a thermal not quite centered yet, the vario is reading a ...
Xpector's user avatar
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Would building a large asphalt square or painted dark black area create a "thermal generator" for glider use?

Imagine if you build a "parking lot" square of asphalt and paint it the deepest black possible to absorb maximum heat...would that spot essentially be a thermal generator that you could fly ...
ljac3's user avatar
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How can I calculate the "stability state" of air from a given set of data?

I would like to know the answer for the above question, it is about how to find whether atmosphere is stable or unstable using DALR (dry adiabatic lapse rate), SALR (saturated adiabatic lapse rate) ...
Pash's user avatar
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What other materials apart from conventional nickel and steel superalloys can be used as a first stage turbine blade material?

Steel and nickel chromium alloys have been prominent and most used as turbine blade material although there are other materials such as tantalum carbides, tungsten and many more which I have no ...
Walter White's user avatar
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Can thermals or high density altitude improve fuel efficiency?

Suppose a pilot is just cruising around building flight time. In order to get the most flight time for fuel, would flying on a dry cold day or on a hot thermal filled day save fuel?
Justintimeforfun's user avatar
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How are thermals mapped in real-time?

Related to "How thermals are found" this question about "Gliding your plane to save fuel" details how to use thermals to save fuel. To use thermals to maximize range, can thermals ...
Justintimeforfun's user avatar
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What are the best places to gain the most altitude in a glider?

I'm a beginner pilot and I started with gliding. How to spot the best thermals and what is the most efficient way to climb?
Wojciech Kacprzyński's user avatar
3 votes
2 answers

Does wind provide lift for hang gliders in the air?

Basically, if there are no thermals, but a strong wind, is there a way to use that wind to gain altitude?
Theo's user avatar
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16 votes
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Could a big plane glide significant distances, same a ordinary glider (1000 km or about)?

Seems that a usual glider is not limited by its glide descent rate and can fly much more than this. It uses air masses that move upward to gain the altitude. Are these effects limited by the size of ...
h22's user avatar
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12 votes
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How is close formation flying possible with things like thermals and turbulence?

This weekend the Blue Angels came to town. The weather was less than perfect. A quick look at SkyVector during their show indicated there was an active AIRMET for moderate turbulence. This made me ...
Ryan Griffith's user avatar
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Do thermals stop rising when clouds are formed?

Glider pilots know that one indication of thermal lift is the formation of cumulus-type clouds. My question is: Does the rising air (that lifted the moisture to form the the cloud) stop rising after ...
benglish's user avatar
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6 votes
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Can a gyro-copter soar?

If one centers the gyro-copter in a thermal and then simulates a hover facing headwind; can the gyro-copter climb up like that ? Is it technically possible or is it advisable....
Ayan Mullick's user avatar
13 votes
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How are thermals found?

As far as I understand glider pilots like to look out for thermals. I assume that when you are in one, you can perceive that and you can make roughly sure to stay in it. But what if you're not in a ...
Řídící's user avatar
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