Markings subtypes of these aircraft were fitted with engines, according to :Ĭoastal Reconnaissance seaplane with 400 hp (300 kW) Liberty L-12, (36 copies + 1 prototype built the 1927th and 1928 when available). Painted light gray, the aircraft were used in coastal reconnaissance and bombing roles and could carry about 250 kg (550 lb) of bombs and were armed with a 7.7 mm (0.303 in) Darne machine gun mounted on the gunner's Scarff ring. The two flight crew members, scout and pilot were seated side by side in parallel and the gunner sat in front of them in an open position with a Scarff ring gun mounting. Auxiliary floats increased the stability of water-borne navigation. The Ikarus IO was a flying boat with completely wooden structure, with wings rounded at the edges and covered with canvas. In parallel with the development of the second IO series, Ikarus built prototype aircraft powered by a Loren engine. Based on observations arising from the operational use of the aircraft, certain modifications were applied and another 24 modified IOs were ordered, receiving serials 113 to 136. The new prototype was named Ikarus IO (Coastal Reconnaissance) and the first test flight took place from the Danube at Novi Sad in September 1926.Īfter all-round tests, the aircraft was given a positive assessment and the Naval Air Force ordered the first series of 12 aircraft, which were delivered during 1927, serialled 101 to 112. The pusher engine and frontal radiator were carried on struts in the inter-plane gap.ĭevelopment A Liberty L-12, as installed in the Ikarus IOĪfter the crash of the Ikarus IM prototype reconnaissance seaplane ( Serbian Cyrillic: Икарус ИМ – Извиђач Морнарички) with 260 hp (190 kW) BMW IV engine, on, Ikarus immediately started development of a second reconnaissance seaplane prototype powered by a 4–00 hp (3.0–0.0 kW) Liberty L-12 engine, also designed by Josef Mikl, the Ikarus Technical Manager. The pilot and observer sat side by side in an open cockpit, and a gunner sat in an open position ahead of them, in the bow. It was a conventional flying boat design for its day, featuring a large single-bay wing cellule, the staggered wings of slightly uneven span braced with N-struts. The Ikarus IO ( Serbian Cyrillic: Икарус ИО – Извиђач Обални) was a biplane flying boat produced in Yugoslavia in the late 1920s.
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