early 1920s

Hi, does anyone know these two aircraft ( Avis 4 Cagno & Avis 5 Serra Zanetti0,and what was Avis company ?

Hi, I'm looking for any volume of the "Der Flug" magazine published in Vienna in 1920 by Österreichische Flugtechnische Verein (Austrian Aeronautical Association) - per WorldCat this magazine doesn't exist, but I have found an article from it (Das Problem der Weltraumfahrt from Dezember 1920...

For some time I've already made these drawings just not yet posted here. You can now see how the Tosa / Kaga class battleships evolved from an Improved Nagato to as laid down as a 5 turreted similar speed slightly larger battleship. Let us begin: Fast Nagato series: A-115...

It is well known fact that the hull of then under construction battlecruiser IJN Amagi lead ship of her class and which was chosen together with her sister IJN Akagi to become aircraft carriers got seriously damaged during the Great Kanto Earthquake happened in 1923 September 1st. Due to the...

The Siddeley-Deasy Sinaia, also known as the Armstrong Whitworth Sinaia and Siddeley Deasy Type 103 was a twin-engine biplane day bomber with gunners in rearwards extensions of the engine nacelles. Four examples were initially ordered by the Air Ministry in 1917 but only one (serial J6858)...

Until the early 1920s, aircraft development was based mainly on the intuition of designers. As for aerodynamics, this science was in its infancy. Suffice it to say that the concept of inductive resistance was not known at that time, which led to the emergence of "flying monsters" with three...

Hi all! Maybe somebody can help with better, or at least bigger, drawing of this triplane monster? The only one which I could find is this (see attachment). I found it here: http://www.straggleresearch.com/2010/10/navy-type-10-carrier-torpedo-aircraft.html.

Drawing of the Imperial Japanese Navy "Number 13"-class fast battleship. Although never officially named, the class is sometimes referred to as the Mikasa-class fast battleship. They are often classed as battlecruisers, but they were a larger, better protected and more powerful version of the...