Development
After the fall of the prototype reconnaissance seaplane (Ikarus IM)(Serbian Cyrillic:Икарус ИМ - Извиђач Морнарички) with 260 hp BMW engine, 31 May 1926. year, Ikarus immediately started development of the second prototype reconnaissance seaplane with the engine Ford-Liberty L-12 with 400 hp, which is constructed as the previous engineer, Josef Mikl Technical Manager Ikarus. The new prototype is named Ikarus IO (Coastal Reconnaissance) and the first test flight took place on the Danube at Novi Sad, September 1926th year.
After all-round tests, the aircraft was given a positive assessment of the Naval Air Force ordered the first series of 12 copies. The first series of the Ikarus delivered during the 1927th The planes and received numerous marks from 101 to 112 Based on observations arising from the operational use of the aircraft, certain modifications and the PV at the end of the 1928th Company made an order for another 24 aircraft IO modified copies. Planes on other series have received numerical codes 113 to 136 In parallel with the development of the second series seaplane Ikarus IO IO designed the prototype aircraft with engine Loren (classic conversion). Markings subtypes of these aircraft were fitted with engines.
Ikarus IO is a class seaplane with central boat, completely wooden structure. It was a biplane, his wings were wooden structures, rounded at the edges and covered with canvas. At the bottom under the wing struts are built-in auxiliary floats that increase the stability of navigation. From his metal braces made, belt and metal support, structures engines (canopy). The aircraft was propelled by a water-cooled engine Ford-Liberty L-12 (Liberty L-12), a 12-cylinder inline engine V-cylinder arrangement with two rows at an angle of 45 °, with 400 hp and pushing wooden propellers fixed steps.
He had three crew members, scout and pilot were seated side by side in parallel and gunner sat in front of them turret. Seaplanes were the standard IO colored light gray. The plane was next to coastal reconnaissance and function bombers could carry about 250 kg. bombs and was armed with a machine gun Darn 7.7 mm in front of the turntable turret.
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