Brain hurts....dewpoint temp calculation

flhrci

flhrci

Final Approach
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Jan 26, 2007
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Groveport, OH
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David
I just tried to Google-Fu how the dewpoint temperature is calculated and I my brain hurts from the complicated formulas. It is worse than the triangle conversation here that I witnessed yesterday.

If any one has a simple answer to the question or wants to discuss triangles more, please feel free.

David
 
And what’s sad, is that what you likely found is the common formula for approximating the dew point around common temperatures. If you need to figure out dew points in uncommon situations, the common approximation doesn’t work, and it gets even worse. At one point I even had HVAC engineers asking if the software I supported went beyond the common approximation, because he had a real life situation outside the range of the common approximation.
 
Is there a reason to know how the temp/dew point spread is calculated? I don’t have one.

You need to save room in your mind for the important stuff.
 
sourdough44 said:
Is there a reason to know how the temp/dew point spread is calculated? I don’t have one.

You need to save room in your mind for the important stuff.
Click to expand...
Nope. I was just curious because the local weather guesser has been over using the term this week. Got me thinking.
 
Just believe it when you see it..... no need to understand the derivation.
 
flhrci said:
I just tried to Google-Fu how the dewpoint temperature is calculated and I my brain hurts from the complicated formulas. It is worse than the triangle conversation here that I witnessed yesterday.

If any one has a simple answer to the question or wants to discuss triangles more, please feel free.

David
Click to expand...

The formulas won't give you any insight unless you dig into the physics behind it. For a pilot, there is no reason to do it anyway. Use one of the many online apps to do it. https://www.omnicalculator.com/physics/dew-point
 
flhrci said:
I just tried to Google-Fu how the dewpoint temperature is calculated and I my brain hurts from the complicated formulas. It is worse than the triangle conversation here that I witnessed yesterday.

If any one has a simple answer to the question or wants to discuss triangles more, please feel free.

David
Click to expand...

It's calculated by sending twenty bucks to these guys
 
luvflyin said:
It's calculated by sending twenty bucks to these guys
Click to expand...

Would those little cotton pads work better if they were equilateral triangles, instead of circular?
Just askin'
 
Here's one for @flhrci

Weight: 2,150 lbs
Speed: 112 kts steady
Course: 020 degrees
Latitude: 26 degrees

Calculate the Coriolis drift on crossing 27 degrees
 
Sac Arrow said:
Here's one for @flhrci

Weight: 2,150 lbs
Speed: 112 kts steady
Course: 020 degrees
Latitude: 26 degrees

Calculate the Coriolis drift on crossing 27 degrees
Click to expand...
You’d be passing 27 degrees for approximately .00000000000000000000000000000000000000000000000000000001 seconds, so the drift would be negligible. :D
 
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