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National Register of Historic Places listings in Minnesota

This is a list of sites in Minnesota which are included in the National Register of Historic Places. There are more than 1,600 properties and historic districts listed on the NRHP. Twenty-two sites are National Historic Landmarks. Minneapolis listings are in the Hennepin County list; this National Park Service list is complete through NPS recent listings posted February 28, 2020. The following are approximate tallies of current listings by county; these counts are based on entries in the National Register Information Database as of April 24, 2008 and new weekly listings posted since on the National Register of Historic Places web site. There are frequent additions to the listings and occasional delistings and the counts here are approximate and not official. New entries are added to the official Register on a weekly basis; the counts in this table exclude boundary increase and decrease listings which modify the area covered by an existing property or district and which carry a separate National Register reference number.

The numbers of NRHP listings in each county are documented by tables in each of the individual county list-articles. List of National Historic Landmarks in Minnesota National Register of Historic Places listings in Voyageurs National Park

Korhonen

Korhonen is a surname originating in Finland, where it is the first most common surname. It has no transparent meaning in modern Finnish, but is to have been derived from the archaic word'korho'. In some dialects, this word is used to mean a person of a numb-witted person. On the other hand, professor Alfred Salmela suggested in 1970 that the word'korho' is a loan from the Baltics and has meant "old, village elder or chief", it still reported to carry a meaning of "proud and boastful" in the southern parts of Finnish Lapland. In addition, in languages related to Finnish such as Karelian and Ludic the word'korho' has the meaning'raised or upright'; as an example of a word derived from this, the Karelian verb'korhottaa' means "to be or move upright, to have one's head up high, to raise, to shake threateningly or brandish and to listen attentively". There are similar examples from Finnish dialects such as'korhopää' from Pöytyä meaning "one with a head of hair standing on end" and'korholaiho' recorded from Ylistaro meaning "a crop growing upright".

In modern Finnish'korottaa' means "to raise". The name originates from Eastern Finland and is much older than its closest competitor for the title of the most common Finnish surname, Virtanen. Aku Korhonen, Finnish actor Erkki Korhonen, Finnish director of opera, pianist Gunnar Korhonen, Finnish economist, government minister Janne Korhonen, Finnish taekwondoin Janne Korhonen, Finnish footballer Kari Korhonen, Finnish cartoonist Keijo Korhonen, Finnish politician and professor Keijo Korhonen, Finnish ski jumper Markus Korhonen, Finnish ice hockey player Martti Korhonen, Finnish member of parliament Paavo Korhonen, Finnish Nordic combined skier Pekka Korhonen, Finnish political scientist and professor Pentti Korhonen, Finnish motorcycle racer Sami Tapani Korhonen, Finnish fashion designer Urpo Korhonen, Finnish cross-country skier

Les Mureaux 3

The Les Mureaux 3 C.2 and Les Mureaux 4 C.2 were French two seat, parasol winged fighters, flown in 1927-8, which differed only in their engines. They were developed into near identical army co-operation types, the ANF Les Mureaux 130 A.2 and ANF Les Mureaux 131 A.2, in 1929-31. The Les Mureaux 3 C.2 was designed by André Brunet and his name is combined with the manufacturer's in the aircraft name. It had an entirely duralumin structure and the forward fuselage was dural covered; the wings and rear fuselage were fabric covered. Its wing was built around two box spars with Warren girder ribs; the Mureaux was intended to operate at high altitudes, so the wing had a high aspect ratio for its time and used a thin wing section of Brunet's own design. In plan it was unswept, with constant chord, semi-circular tips and a rounded cut-out in the trailing edge over the forward cockpit. Ailerons occupied the whole of the trailing edge; the wing mounting was unusual, with airfoil section, N-form struts on each side connecting the wing spars not to the lower fuselage but instead to the frames that carried the independently rubber sprung undercarriage mainwheels.

These frames, enclosed in streamlined fairings 2.50 m apart, were braced the upper fuselage longerons with shorter N-struts and with inverted V-struts to the central fuselage underside. Short, inverted V-struts attached the wing centre section to the upper fuselage. There were no wing bracing wires; the fuselage of the Mureaux was built around four duralumin tube longerons, with repaired connections to tubular diagonals and with removable panels covering the forward part. Two removable engine mountings allowed either a 440 kW Hispano-Suiza 12Hb V-12, a type identified at the time as the V-12 500 hp Hispano-Suiza, or a water-cooled 370 kW Salmson 18 Cm radial engine to be fitted. Both engine types used an adjustable honeycomb radiator projecting from the fuselage underside and were fed fuel from a jettisonable tank behind the engine and ahead of the engine firewall; the Hispano version was designated the Les Mureaux 3 and the Salmson powered aircraft Les Mureaux 4, the latter 78 kg heavier. The pilot's open cockpit was under the wing cut-out, with the gunner/observer, equipped with cameras, small bombs and guns, separately behind him.

The tail unit was conventional, with a flight-adjustable tailplane mounted on top of the fuselage and braced from below with a single strut on each side. Both it and the fin had straight leading edges. Both rudder and elevators were unbalanced. On the fuselage underside below the tail was a rubber sprung and dural tailskid with a steerable shoe; the exact date of the Les Mureaux 3 C.2's first flight is not known. It had been flown before the end of June 1927, when it was being tested at Villacoublay; the Salmson-engined Les Mureaux 4 C2 was on display at the 1928 Paris Show. Between the 11th and 12th Paris Aero Shows Ateliers Les Mureaux became known as ANF Les Mureaux when they amalgamated with Ateliers de Construction du Nord de la France, they changed their type designations into three digit numbers. By mid-1931 they had introduced two observation aircraft identical to each other apart from their engines and similar to the types 3 and 4, designated ANF Les Mureaux 130 A2 and ANF Les Mureaux 131 A2.

The types 3 and 130 had the same engine but the type 131 was fitted with a 500 hp Renault 12 Jc water-cooled V-12 engine, which made it longer and slower than the type 130. Both were heavier than the types 3 and 4 when equipped; the Type 130 could reach 5,000 m in 21 minutes. Externally the types 130 and 131 differed most in the covering of their wings; this mixture made the 131 better suited to outside storage whilst allowing easy assessment of internal wing damage. The type 130 was first reported in November 1929 but the type 131 did not fly until the first half of 1931. Les Mureaux 3 C.2 Hispano-Suiza 12Hb engine, fighter Les Mureaux 4 C.2 Salmson 18 Cm engine, fighter ANF Les Mureaux 130 A.2 Hispano-Suiza 12Hb engine, reconnaissance ANF Les Mureaux 131 A.2 Renault 12 Jc engine, reconnaissance Data from Jane's all the World's Aircraft 1928, NACA aircraft circulars no.42 General characteristics Crew: two Length: 8.45 m Wingspan: 15.00 m Height: 3.10 m Wing area: 32.5 m2 Aspect ratio: 6.9 Empty weight: 1,160 kg Gross weight: 1,980 kg Fuel capacity: 300 kg Powerplant: 1 × Hispano-Suiza 12Hb water-cooled V-12, 440 kW Propellers: 2-bladed fixed pitch propellerPerformance Maximum speed: 268 km/h at sea level, 231 km/h at 5,000 m Stall speed: 102 km/h Service ceiling: 8,600 m Time to altitude: 25 min 16 s to 6,000 m Wing loading: 61.2 kg/m2 Power/mass: 0.1868 kW/kg Armament Guns: 2x fixed forward firing 7.7 mm Vickers machine-guns.