Looking forward to seeing how the research on that came about.

Have you tried contacting the American Iron and Steel Institute? 

https://www.steel.org/

Karen Hoy #2610

Subscribers to TIGHARNews emails will have seen the following notice sent out yesterday:

ARTIFACT IDENTIFIED

Subscriber responses to the October issue of TIGHAR Tracks and recent TIGHARNews emails inspired new research that has identified an artifact recovered during TIGHAR’s first visit to Gull Pond thirty-one years ago.

TIGHAR Artifact 1-21-P-1 was found with a metal detector and pulled from the mud just off the southern tip of the rocky island in
Gull Pond in October 1992.

TIGHAR Artifact 1-28-P-2, the small steel disk found
in 2021, remains unidentified.

Now preserved at The Rooms cultural and historical center in St. John’s, Newfoundland, TIGHAR Artifact 1-21-P-1 can now be reliably identified as a segment of a cylinder wall from a liquid-cooled internal combustion engine that pre-dated the first use of machines of any kind on the Cape Shore barrens.

The materials, properties, and dimensions of the artifact match a specific section of a cylinder from a 450 hp Lorraine Dietrich W12 engine like the one that powered l’Oiseau Blanc.

Exciting as these findings are, a word of caution is in order. Until the rest of the engine is found, the identification of the artifact must remain tentative.
The November issue of TIGHAR Tracks will detail the case for 1-21-P-1 being from l’Oiseau Blanc and how the new findings affect TIGHAR’s hypothesis and plans for the 2024 search.

****************

I'm currently writing the paper to be published in the upcoming TIGHAR Tracks and there's an historical question I'm hoping someone will be able to help answer.
XRF (X-Ray Fluorescence) analysis shows the artifact to be made of "12L14" steel.  It's easy to find the properties of 12L14 steel but, so far, I haven't been able to find out when that alloy was first produced. 
in testing hypotheses, we're always looking for disqualifiers. If 12L14 steel wasn't used until after 1927, either the XRF analysis is wrong (unlikely) or the artifact is disqualified as as being from l'Oiseau Blanc.

What do we make of this Coastguard telegram mentioned in the film The Oiseau Blanc Mystery? Doesn't it mean the aircraft ditched in the sea? Are there other telegrams? What happened to the wreckage?

If you read the previous postings on this thread, you'll see that there is no reasonable chance that the wreckage described in the telegram was from l'Oiseau Blanc.

It's very flattering.  It remains to be seen what they can contribute.

Missing.Aero being a new partner is exciting, especially since they're in Europe, where White Bird originated.  I'd think having actual engineers who speak French would be invaluable.  Bravo!

And the user manual is at https://www.avialogs.com/engines-l/lorraine-dietrich/item/56048-moteur-lorraine-450cv-12-cylindres-en-w-description-entretien-reglage-fonctionnement-sur-avion
In French too.

Here is an interesting piece (in French) on the Lorraine Dietrich 12eb aviation engine, with a number of period photographs and drawings of the engine.
adr
http://www.hydroretro.net/etudegh/lorraine12eb.pdf

Thanks for finding this -- it seems to answer any question of Rasmussen's identity. I went looking for officer rosters and hadn't found any, so, good work.

It says something about officer promotions in the inter-war USCG that the district commandant was only a lieutenant. In my father's time -- 1950s-60s-- it would have been a higher rank.

Notable too that Warner Thompson of the Itasca was a Commander in 1937, at would be a rather advanced age for that rank today.

Don W

As to Morse code with the mic button:
Transmitters of this era frequently were activated not by a relay on the high-voltage, but by a relay on the tube filaments. This is because a relay on the high voltage would arc and filaments are low voltage. The filaments took a moment to heat. When voice was used there was a fraction of a second until the tubes were ready. Not a problem as usually the operator pressed-the-pickle and spoke a moment later.

If the mic button was used for Morse, the dots/dashes would be messy in timing. This is why there was a CW setting for the transmitter. Filaments were on continuously and carrier was activated by another means.

I looked at the WE 13C transmitter schematics several years ago and seem to recall noticing this. In my youth as a Ham I played around with old WWII equipment. I am asking someone to look at the schematics and see if my statements above are correct. I'm a little too busy now to dig into this again.