Pintle exotic metal alloys. For World War II aircraft with sideways-retracting main gear units, carefully set-up "pintle angles" for such axes of rotation during retraction and extension allowed the maingear struts to be raked forward while fully extended for touchdown and better ground handling, while permitting retraction into rearwards-angled landing gear wells in their wings to usually clear the forward wing spar for stowing while in flight. Pintle A pintle is a pin or bolt, usually inserted into a gudgeon, which is used as part of a pivot or hinge. Other applications include pintle and lunette ring for towing, and pintle
The Geographical Pivot of History Britain that its traditional reliance on sea power would become a weakness as improved land transport opened up the Heartland for invasion and / or industrialisation (Sempa, 2000). Mackinder identified the geopolitical nightmare that was to haunt the world's two sea powers during the first half of the twentieth century—Great Britain and, later the United States. Signs of Mackinder's Heartland Theory can be found in the works of geopolitician Dimitri Kitsikis, particularly in his "Intermediate Region" model. There is a significant geographical overlap between the Heartland or "Pivot Area" and the Intermediate Region, with the exception of Germany-Prussia and north-eastern