Good Evening,
It was sunny and warm today. Most of the snow has melted so I went
for a walk to check the damage to the forest. A few dozen broken trees
ranging from ten inches in diameter to twenty. Their trunks exploded
into many shards around thirty feet up. Only the Doug fir shattered;
cedar and hemlock trees are unharmed. Some birds returned and daffodils
are growing though the remaining snow.
The sun looks almost bare but the flux is still high. A rain of
protons is absorbing RF around the poles. There was a strong flare from
a sunspot not yet facing Earth. Propagation should be OK tomorrow, with
plenty of QSB and a steady hiss from the ion flow.
Please join us on (or near):
14050 kHz at 2200z Sunday (3 PM PDT Sunday)
7047 kHz at 0000z Monday (5 PM PDT Sunday)
73,
Kevin. KD5ONS
-
NACA, the National Advisory Committee for Aeronautics, was the
precursor to NASA. During the 1920s they codified airfoils with four
digit numbers. I wrote some code to give me the coordinates of an
airfoil surface from their equations. I created a dozen airfoil
profiles to place into my wind tunnel code. Screen shots of the results
are here: http://bacona.design/tunnel.html
And now for something completely different:
https://www.quantamagazine.org/ocean-bacteria-reveal-an-unexpected-multicellular-form-20221102/
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