Welcome to the "Blast from the Past" Newsletter!
Reviews of the NACA-era aircraft icing publications, 1915 to 1958.

- Latest post:

Site Improvements https://icinganalysis.com/site-improvements.html

- Interesting finds:

A commenter on LinkedIn pointed me to Kelley Johnson's 1940 "Wing Loading, Icing and Associated Aspects of Modern Transport Design" https://arc.aiaa.org/doi/abs/10.2514/8.10478. I might add this to the Ice Shapes and Their Effects thread on the blog.

- Most popular posts (so far...):

#6: NACA-TN-313, "The Formation of Ice upon Airplanes in Flight" https://icinganalysis.com/naca-tn-313.html
One of the earliest publications I have reviewed, with eye-catching sketches and a great quote.

- Upcoming posts:

The reposting of revised posts continues on Mastodon https://historians.social/@icinganalysis (and, less reliably, on LinkedIn).
9/29: A Detailed Comparison of Water Drop Impingement Calculations
10/2: Implementation of multicylinder calculations in Python
10/4: NACA-TN-1393, “A Flight Investigation of the Meteorological Conditions Conducive to the Formation of Ice on Airplanes"
10/4: NACA-TN-1393, “A Flight Investigation of the Meteorological Conditions Conducive to the Formation of Ice on Airplanes"
10/6: NACA-TN-1424, "A Further Investigation of the Meteorological Conditions Conducive to Aircraft Icing"
10/11: The Historical Selected Bibliography of NACA-NASA Icing Publications
10/13: NACA-RM-A9C09, "A Review of Instruments Developed for the Measurement of the Meteorological Factors Conducive to Aircraft Icing"
10/16: The Greatest Thing That You Have (Probably) Never Read: AC 00-6A
10/18: NACA-TN-1904, "Observations of Icing Conditions Encountered in Flight During 1948"
10/20: NACA-TN-2708, "Comparison of Three Multicylinder Icing Meters and Critique of Multicylinder Method"

- Upcoming Aircraft Icing Events:

Submissions for papers open October 3, and close December 13, for the AIAA Aviation Forum, July 29 to August 2, 2024, so get typing!
https://www.aiaa.org/aviation/...

The SAE AC9C Aircraft Icing Technology Committee meeting is October 23 to 26, 2023.
https://standardsworks.sae.org...

- Quote of the week:

“the greatest of all our problems is ice.”

'The situation changed in the mid-1920s when the intrepid aviators of the U.S. Air Mail Service attempted to maintain scheduled day-and-night operations between New York and Chicago... As one of their pilots noted at the time about the hazards of the New York-Chicago route, “the greatest of all our problems is ice.”'

via https://ntrs.nasa.gov/citation...

- What is in work:

Porter Perkins thread draft https://icinganalysis.com/draf...

- Public Domain image of the week:

https://icinganalysis.com/images/naca-tn-2904/Figure15.png
#AltText: Figure 15 of NACA-TN-2904. Water-drop-trajectory analog.
Two investigators operate a large mechanical computer.
One is seated turning a crank attached to a large cylinder labeled "Input Chart".
The second operator turns another input chart crank.
Another cylinder is labeled "Droplet Trajectories".
There are many shafts and gears visible in the machine.
Some machine parts are labeled with the differential equations of motion being solved.