The Kolb Mark III is a family of American side-by-side two seater, high wing, strut-braced , pusher configuration , conventional landing gear -equipped ultralight aircraft that is produced in kit form by New Kolb Aircraft of London, Kentucky , and intended for amateur construction .
10-826: The Mark III's standard engine was originally the 64 hp (48 kW) Rotax 582 engine, but the current engines offered are the 80 hp (60 kW) Rotax 912UL or the 100 hp (75 kW) Rotax 912ULS . In its home country the aircraft is normally licensed in the Experimental - amateur-built category. The design features a forward fuselage of welded 4130 steel tubing, mated to an aluminum tailboom. The horizontal stabilizer , tail fin and wings are also constructed of riveted aluminum tubing with all flying surfaces covered in doped aircraft fabric . The wings and horizontal tail are quick-folding for storage and ground transport. The original Mark III can be made ready to fly from trailering in eight minutes by one person without
20-572: A 200 ft (61 m) take-off run. In reviewing the aircraft Andre Cliche said: The Twinstar Mk III is a very clean and aerodynamic design. lt looks fast and flies fast. With standard dual controls, it can be used as a trainer, but it is most often used as a cross-country cruiser. It is especially desirable for its folding wings. Data from Kitplanes, Cliche and Purdy General characteristics Performance Avionics Related development Aircraft of comparable role, configuration, and era Rotax 582 The Rotax 582
30-475: A wide band expansion chamber exhaust system with an extra after-muffler as optional. The standard starter is a recoil start type, with an electric starter optional. An integral alternating current generator producing 170 watts at 12 volts with external rectifier-regulator is optional. The engine includes an intake air filter and can be fitted with an optional intake silencer system. By July 2021, more than 30,000 engines had been sold. In July 2021,
40-412: A wider rpm range. Reliability over the 532 was also improved. The 582 features liquid-cooled cylinder heads and cylinders with a rotary intake valve . Cooling is via an externally mounted radiator. Lubrication is either by use of pre-mixed fuel and oil or oil injection from an externally mounted oil tank. The 582 has dual independent breakerless, magneto capacitor discharge ignition (CDI) systems and
50-422: Is a 48 kW (64 hp) two-stroke , two-cylinder, rotary intake valve , oil-in-fuel or oil injection pump, liquid-cooled, gear reduction-drive aircraft engine manufactured by BRP-Rotax GmbH & Co. KG . It is for use in non-certified aircraft operating in day visual flight rules . Production of the engine ended at the end of 2021. The Rotax 582 is based upon the earlier Rotax 532 engine design and
60-541: Is equipped with two piston-type carburetors . It uses a manifold-driven pneumatic fuel pump to provide fuel pressure. An optional High Altitude Compensation kit is available. Early in the engine's production the propeller drive was via a Rotax type B gearbox, which offered gear ratios of 2.0:1, 2.238:1, and most common 2.58:1. Later in production type C or E gearboxes were offered with gear ratios of 2.62:1, 3.0:1, 3.47:1, and 4.0:1. (The type E gearbox includes an integrated electric starter motor.) The standard engine includes
70-495: Is not a certificated aircraft engine. It has not received any safety or durability testing, and conforms to no aircraft standards. It is for use in experimental, uncertificated aircraft and vehicles only in which an engine failure will not compromise safety. User assumes all risk of use, and acknowledges by his use that he knows this engine is subject to sudden stoppage...Never fly the aircraft equipped with this engine at locations, airspeeds, altitudes, or other circumstances from which
80-554: The manufacturer announced that the engine's production run will end by the end of the year, although the engine will still be sold until stocks are depleted. Rotax recommends teardown and inspection every 150 hours, and overhaul every 300 hours. The manufacturer acknowledges the design limitations of this engine, warning pilots: "This engine, by its design, is subject to sudden stoppage. Engine stoppage can result in crash landings, forced landings or no power landings. Such crash landings can lead to serious bodily injury or death...This
90-412: The use of tools, while the newer M3X variant is rated at 15 minutes to assemble for flight. The landing gear is sprung tubing for the main gear, with a steerable sprung tailwheel and the cabin is 45 in (114 cm) in width. Factory options include brakes, Ballistic Recovery Systems airframe parachute and powder coating of the steel parts. The manufacturer describes the aircraft as STOL , with
100-400: Was designed for ultralight aircraft . The 582 increased the bore from the 532 engine's 72 to 76 mm (2.8 to 3.0 in). This increased the displacement from 521.2 cc (31.81 cu in) to 580.7 cc (35.44 cu in), an increase of 11%. The increased displacement had the effect of flattening out the 532's torque curve and allowed the 582 to produce useful power over
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