The model featured a versatile and powerful brushless power system, designed to be capable of using either a three-cell or four-cell LiPo battery with nothing more than a propeller change required. The EFX Racer was originally available in red or yellow color schemes, both of which featured a thorough slathering of HobbyKing- and Durafly-associated product brands and logos. Many pilots were surprised to see a sleek and stylish model with an obvious race-bred pedigree suddenly emerge from the Durafly design hangar. Most of the Durafly models that were released before the EFX Racer were solidly based on scale aircraft. You cannot begin a review of the Durafly EFXtra-an exciting, high-performance, foam composition speedster-without a short digression to the autumn 2014 release of the original Durafly EFX Racer. The battery hatch is a slightly different shade of red than the rest of the fuselage.The 3mm gap between the spinner backplate and fuselage is somewhat wide.A variety of battery sizes can effectively be used in this model, although the narrow fuselage might disallow irregular-shaped packs from being used.The included FPV canopy allows enthusiasts to climb aboard for a triple-digit, high-speed thrill ride.The use of ball-link-style connectors on all control surfaces minimizes pushrod backlash and makes for precise pushrod positioning and performance.The EFXtra is capable of being flown on either a three- or four-cell battery with only a required propeller change, allowing pilots of various skill levels to progressively acclimate to this model’s high-performance flight envelope.The EFXtra allows speed-hungry pilots to go fast without breaking the bank.Ready-to-fly weight: (4S) 30.6 ounces (3S) 30.8 ounces Radio system: OrangeRx T-SIX 2.4 GHz six-channel transmitter OrangeRx R615X 2.4 GHz six-channel receiver Motor used: AeroStar 3536-1780 Kv brushless outrunnerĮSC: 60-amp AeroStar with 5-amp BEC XT60 connectorīattery: Turnigy nano-tech 3S 11.1-volt 65C 2,200 mAh or 4S 14.8-volt 65C 1,800 mAh LiPo Radio system: Minimum four channels required
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