North American Aviation T-28 Trojan (Restoration to Flight Status)

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NORTH AMERICAN AVIATION T-28 TROJAN (RESTORATION TO FLIGHT STATUS) The well known North American Aviation T-28 Trojan is a piston- engine military trainer aircraft used by the United States Air Force and United States Navy beginning in the 1950s. Besides its use as a trainer, the T-28 was successfully employed as a counter-insurgency aircraft, primarily during the Vietnam War. It has continued in civilian use as an aerobatics and Warbird performer. Such a classic beauty couldn’t be absent from the Team’s inventory. Although not a pure aerobatic Warbird, nevertheless an ARF bird made by ESM was added 5 4 years ago to the fleet. The specs as given by the manufacturer are: Wing Span: 81" (2057 mm) Length: 63.5"(1613 mm) Wing area: 7.55 sq. ft (70.12 sq. dm) Wing Loading: 3 9.5 oz/sq. ft (117 g/sq. dm) Flying Weight: 18 lbs (8.2kg) Radio: 6ch&8 servos Gas Engine: 36cc – 55cc engines such as the PTE36 or the DLE-55. Glow Engine: 180 4-cycle Prop Recommendations: 3-blade is most common. 2 and 4 blades were also used. Servo Recommendations: 100 oz-sq-in minimum - HD-1501, Hitec 645MG, Hitec 5645MG, DS-8309TG An air retract system was installed controlled by an ON-OFF switch on the HITEC AURORA 9X radio. The T-28 operated problem- free for enough time, but when the bigger birds came in (PITTS Model 12 & YAK 54) it was put to storage in order to be re-enabled in the future. Below are some photos from a Sunday morning in Prosotsani, Drama, Greece at the Ultra lights airfield that we are using among others. The time for the T-28 return to active service has come! A refreshment was more than necessary. A thorough check of everything was a MUST. A new receiver was added. In this case an Optima 7 channel 2.4 GHZ made by Hitec that bonds ideally with the HITEC AURORA 9X radio. Three Li-po batteries were put onboard with different duties such as power of the lighting system (Strobes and Navigation), receiver’s power and engine’s electronic ignition power. The power plant on board is a DLE 35. The engine’s specs as given by DLE are: Displacement: 34.9 cc (2.13 cu in) Bore: 1.52 in (38.5 mm) Stroke: 1.18 in (30 mm) Total Weight: 2.77 lb (1.26 kg) RPM Range: 1,500-8,500 Output: 4.1 hp @ 8,500 rpm The fuel lines were rechecked, rudder pull-pull wires were replaced with new ones, the hinges inspected, air retracts system tested, free movement of AILERONS, FLAPS, ELEVATORS, RUDDER & THROTTLE was checked and the 19x10 size propeller tips painted yellow. Finally it was time for an engine start up. The cowl was taken off, an improvised anchor (a belt attached to tree) and two cement bricks were applied and the trustworthy engine didn’t hesitate at all. Just a few revolutions of the propeller it was all it needed for fuel to be sucked in to the rear facing Walbro. The DLE came to life with a steady idle. A minute later the throttle was advanced. The handheld tachometer showed more than satisfying readings, such as idle at 1350 Rpm and 6680 Rpm at full throttle, the engine equipped with a Pitts style muffler. The T-28 was put back on its cradle, waiting for the next weekend to meet the skies again! Keep posted! .

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