1930s

Does anyone have: - general plans and armor scheme of the Eendrachts. For the armor, the correct figures seems to be 100mm belt of unknown height and length closed by 60mm traverses at the end barbettes, with 75mm armor extending beyond the citadel on the sides for an unknown distance, topped by...

Hi everyone, This thread is about the French tanks designed or contemplated for the new tank program drawn up by the French Inspector of Tanks in December 1939-February 1940, Général Keller. This wartime program was intended to organize development of tanks in control of the infantry branch...

I am going to tread carefully with this one but I think it is worth a look. Instead of the Hitler regime from 1933 Germany is run by a conventional centrist party. The Weimar Republic survives. But its strong willed Chancellors still seek to overturn the restrictions of the Versailles Treaty on...

The Invention Of The Jet Engine: Hans Von Ohain, One Of The Fathers Of the Turbojet

Société Dyle et Bacalan - 1924-1929 In 1924, shipbuilders Société de Travaux Dyle et Bacalan of Bordeaux established an aeronautical division to design and build aircraft of all-metal construction. This shipbuilding firm went bankrupt in 1928 and was bought by the Ateliers et Chantiers...

SPF contributor Motocar posted to his website this cutaway of the CLW Curlew. The post referenced his source, an archival version of the German magazine Flugsport for 1937. I couldn't find a thread for CLW here at SPF, so I started this one as this airplane contains some structural details...

Something about Super-A Cruisers before Maru-5 Project. Source: 早川幸夫，スーパー・クルーザー「超甲巡」覇王伝説，月刊《丸》，2013年5月号 (Monthly "Maru", May 2013). The author stated that in a 1934 document named "Required National Defense Force from Treaty-Break to 1940" (条約決裂後ノ昭和十五年度ニオケル国防所要兵力表), that IJN's original plan...

This book is written by the german Winkler-Researcher Reinhard Sagner. He focuses on the technical asprects of Winkler´s work in and for the Junkers Company in Dessau in the time between 1929 and 1939, when Winkler left Junkers for the Luftfahrtforschungsanstalt Braunschweig. The author has used...

This is an alternative history of Goddard's historical liquid rocket launch of 1926 and the succeeding development of a fictional experimental rocket airplane based on Goddard's designs. The advent of the design and its governmental support ultimately leads to a change in the course of the US...

https://www.bbc.com/travel/article/20220919-the-sunken-steamboats-of-maines-moosehead-lake

Hi, I hope in this topic,that we can speak about Russian I series,of course I don't mean internal designation for each company,but I intend to make a sequence of "I" series in official designation,and may it was belonged to TsAGI ?,such as I-1 for Polikarpov,I-2 for Grigorovich and go on. Also...

Hi all! In one work dedicated to the Spanish Civil War (Euzkadiko Gudontzidia. La Marina de Guerra Auxiliar de Euzkadi (1936-39), Juan Pardo San Gil), information was found regarding the plans of the Basque government to strengthen its armed forces, including the navy. Two interesting projects...

Video might be of interest. Can't speak to its accuracy, but at least it doesn't seem too insane. View: https://www.youtube.com/watch?v=kfio0VHXUmw

I've just read this in the Battleships Axis and Neutral Battleships in World War II book by William H. Garzke and Robert O. Dulin about a proposed modernization of the 2x Espana class battleships. Does anybody know anything more about this project? also

Since the end of the First World War, bold attempts were made in the Soviet Union in the field of rockets and various types of weapons, although timid, but existing and somewhat significant for the hard period that the Union was going through at that time, sometimes typically handcrafted and...

I'm on the scrounge. Does anyone have a copy , or just the key text, of specification R.2/33 that they would be willing to share? Failing that does anyone know whether the text of the specification has been included in any article or book, most likely one about the Sunderland. Thanks

Does anyone know Bohler 47mm L70? In WW2,Bohler 47mm L32 M1935 was famous,but according to some articles,47mm L32 couldn't be used well against tanks in the war,so Bohler designed L55,even...L70 I failed to find its data.

From, Поликарпов У-2, here is a drawings to Polikarpov U-2 and its variants.

A website devoted to tracking as many of the various iterations of the M4 Sherman as can be determined from surviving documentation. http://the.shadock.free.fr/sherman_minutia/index.html

Actually an early example of a signals intelligence mission: View: https://youtu.be/tfTkgT_XvCc