Unfortunately, the website https://www.avionslegendaires.net/avion-militaire/levasseur-pl-4/ says unequivocally that no PL 4 has survived their decommissioning (except the one that may still be sitting on the floor of the Mediterranean ...). But the French ministry of Armed forces (even though they do not know in what circumstances) has salvaged 195 blueprints from the Levasseur company, which are available online at https://www.memoiredeshommes.sga.defense.gouv.fr/fr/article.php?larub=407&titre=plans-de-constructeurs-aeronautiques-sur-des-appareils-civils-et-militaires-xxe-siecle-
Just in case you did not notice, one is the side view of the internal arrangement of a PL 8 (apparently not l'Oiseau blanc, but the second "postal" PL 8, which, according to Wpd, "was built [in 1928 and] equipped with a Hispano-Suiza 12M 375 kW (500 hp) engine. Flown in 1928, the PL.8-02 was intended as a long-range record breaker but modified as an air mail carrier"): https://www.memoiredeshommes.sga.defense.gouv.fr/fr/ark:/40699/s0062cad8b3f3722/62cad8b400a1d
That may give some ideas. However, the caps (or lids) do not seem to be other than an ordinary type... Sorry I do not find how to make a reduced image suitable to be included here, but someone will soon find how to do that, if showing this blueprint appears of some interest.

here is the jerry can.
adr

Ric-

Note the sealing mechanism on a World War II jerry can.  Fancy glass beer bottles use a similar mechanism.  The latch exerts pressure along the centerline of the lid.  Gasket around the periphery of the lid. Holds pressure, No vapor leaks, at least in principle.  No threads on the lid.

adr

Lorraine Dietrich engines are not hard to find, but just an engine does not show us what we need to see. We think we might have the cap from the filler neck of the water reservoir (aka header tank) that sat on top of the engine.

I imagine you've already seen this Ric, but just in case...  https://www.skoda-storyboard.com/en/press-releases/skoda-museum-presents-an-extraordinary-exhibit-the-w12-aircraft-engine-by-laurin-klement/

Current research suggests the artifact we found in 2021 may be the cap on either the coolant filler neck or coolant drain plug for the W12 Lorraine Dietrich engine of l'Oiseau Blanc.
Unfortunately, neither the Lorraine Dietrich manual nor the parts manual for the Levasseur PL-4 aircraft (from which the PL-8 l'Oiseau Blanc was derived) shows those features.  We need a surviving PL-4 with a Lorraine Dietrich W12 engine but we can't find a museum or collection that has one.

A TIGHAR member recently asked me to review an article in the April issue of EAA Sport Aviation titled The History of a Fated Mystery - Museum Preserves An Aviation Pioneer. I was happy to oblige.

The first problem with the EAA article is the title. The author buys into The Amelia Earhart Hangar Museum's underlying worship of Earhart as an “aviation pioneer.”  None of Earhart’s record setting flights pioneered anything or added to the advancement of aviation development.  The museum’s interactive exhibits sound excellent and admirable, but it is less a museum than an indoor educational theme park. As a venue for teaching history it fails miserably.

The first falsehood in the article is the statement that Earhart broke “the barrier for women in aviation.”  Earhart never had a flying job.  Other women broke the barrier of employment in aviation.  Elinor Smith worked as a demonstration pilot for Bellanca.  Louise Thaden did the same for Travel Air.  Helen Richey was the first woman hired as an airline pilot.  Earhart spoke out against employment discrimination, as did the other record-setting female pilots of the 1930s, but it was the civil rights legislation of the 1960s that ultimatley made it illegal.

Next:
“While teaching at Purdue University, she worked with the school to get the funds to purchase it. With dual Pratt & Whitney R-985 Wasp Junior engines that were fairly new technology, the Electra 10-E was one of the fastest airplanes of the time.”
How many errors can you pack into two sentences? Earhart never taught at Purdue. She advised female students for a couple weeks in 1936, and she had nothing to do with conning Purdue into putting up the money for an airplane.  That was done entirely by her husband George Palmer Putnam.  The Model 10-E had R-1340s, not R-985s and there were many faster aircraft.

Next:
“The airplane’s exciting because there were 14 of those made, and this one was second off the line, and Amelia’s was about 10th or 12th off the line. But there are no more of these left.”
The museum’s airplane, cn 1042, was the 42nd Model 10 built and the second 10-E. There were 16 10-Es built.  Earhart’s was the 5th.
“All the guts in this plane are exactly like Amelia’s”
The interior is bare and the plane has full-feathering props.

Next:
“..learn how Amelia navigated the night sky with stars and constellations …”
Earhart never navigated the night sky with stars and constellations.

The Amelia Earhart Hangar Museum is an example of how the myths and misconceptions about Earhart have gotten way out of hand.  I’m hoping my new book will provide some perspective and, for people who care about facts, permit a more nuanced and accurate understanding of who she was.

Hi,
Are there people who have experience with printing AND building the paper construction plates "Amelia Earhart's Lockheed Electra, The William F. Harney Drawings" ?
Is there also a (cut/paste) description?

On the "Adobe" website I see a 7 day free trial period of "Illustrator"! Perhaps the correct version! I think I should be able to print the sheets within this period
The downloads can be printed on regular A4 format, perhaps on 160 or more gram paper ?!

The info at the "TIGHAR Store" says: "If you do have Illustrator, but don't have CC...". WHAT is CC?

Greetings, Guus.

Hi,
I already suspected something like that! When I prepare my order on-line, it shows 0.00 shipping costs! Hence my question.

Hi,
Is it really true that when purchasing "One more Good flight" there are no shipping costs to Belgium?!

No, we have never said the shipping of signed copies of One More Good Flight will be free.  The book will measure 10x7x1 inches and weigh 24 ounces.  When the books are ready to be shipped we'll offer a variety of options and accept payment via the TIGHAR Store.