CARF-Models Ultra Flash New for 2010 the Ultra Flash is an updated version of the best selling Flash, designed for higher performance with a new wing and tailplane. The new wing is swept back with greater span, larger flaps and tapering section from root to tip. The swept design makes the Ultra Flash easier to balance with the lighter Li-Po cells now used by the majority of jet modellers. The wing design has been successfully tested on designs like the Spark and Ultra Lightning. The Ultra Flash has also been designed from the start for use with a trailing link undercarriage set, the main wheel wells are a few mm back from the leg centre and the main leg openings are wider to accept the CARF supplied trailing link legs. Construction follows the same process as the original Flash, the fuselage is identical, as is the process for installing the elevator servos. The wings use the same combined gear cover and aileron/flap servo mounting plate, screwed to the wing with 9 screws. Follow the construction process shown in the manual, using this addendum. Wings The wings follow the same assembly process. If you are using the original straight Oleo leg from the original Flash, leg cover plates are supplied. These can also be fitted to some trailing link main legs if you want a cleaner lower wing surface. The kit also includes a pair of moulded U section mouldings to seal the leg openings. These will require trimming around the under carriage units and to length. The wing flaps use a ball link connection at the flap end and a clevis at the servo. The flap is factory fitted with a pair of horns ready to accept the supplied ball link. A long Allen driver is required to fit the M3 x 16 ball link screw. Access is from inside the moulded hinge cover knuckle. Move the aileron up and flap down to gain access. Spend some time setting the Flap pushrod length before fully screwing the cover plate down. The threaded rod should be approximately 50mm long and a good starting point for the push rod centres would be 75mm. This is centre of ball link to clevis pin. The aileron pushrods need to be approximately 60mm long with 86mm centres. Both figures based on JR 8411 servos. The flap settings for the Ultra Flash are: The Ultra Flash requires down elevator with flap. Take off 1.5mm and Landing 4.5-5mm measured at the elevator trailing edge tip. Exact figures will be affected by balance position. Movements ailerons 15mm up and 18mm down-Expo 35-40%. Elevators 15mm up and 16mm down 45-50% expo, Rudder 45mm each way 30-35% expo. Ail/Elev tip joint. Rudder lower TE point. Balance point, gear up 220-225mm back from the wing/fuselage joint.
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