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The Nikitin-Shevchenko IS-2 was a single seat "polymorphic" fighter with a folding lower wing which retracted into the upper wing. It was powered by a Tumansky M-88 1,100 hp 14-cylinder twin-row air-cooled radial engine and armed with two light and two heavy machine guns. While in trials it proved to have the short take off distance and good climb rate of biplane but it lacked in comparison of the latest monoplanes. Tests were interupted by the German invasion of 1941 and never resumed.

 
The Rodney and Nelson were conversions of super battleships laid down before the Washington Naval Treaty. In order for them to meet the weight class limitations of the treaty the rear of the ships were lopped off, leaving only the forward turrets.
They were not conversions of a previous design but were designed from the beginning to meet the class limitations of the treaty. The Japanese and USA had 16in battleships and the UK were allowed to build two but they had to meet the weight restrictions, hence the unusual design
 

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