testing of propellers. other times.. .

[marcof]

as object. :smile:

 

[Er Presidente]

as object. :smile:

Can I publish it?

 

[marcof]

Can I publish it?

Of course, publish wherever you want.
every now and then I enjoy browsing two bound volumes of vintage 1911 of this "fifteen-year magazine of scientific vulgarizations":smile: found on a stand.

there are items like:
"The Turbine Self of the Grand Duke Cyril of Russia"
"the mechanism of light signs"
"Empty cleaning with electric pumps" (read " vacuum cleaner" :biggrin

if I find other "sages" of aviation topic I publish them here.