ElectricFlight T
he Hobby King http://www.hobby-
king.com Durafly Telemicro is a miniature foamie version of Hobby Lobby’s venerable Telemaster
which seems to have been replicated in every conceivable size. HK’sTMsells for $69 complete except for the battery and receiv- er. The installed HKM 5320 servos and 6- amp ESC have 1.25 mm Molex connectors.
The motor is an AP05 3000 Kv brushless outrunner with a 5–3 prop and no thrust off- set. A DSM2 compatible HK 4-channel Or- ange Micro Rx (R415 for $10) mates with these and is the intended match, although a DT-Rx34 would work as well and would pro- vide a little more room in the jam-packed fuselage. A 2-cell 180–250 mAh Li-Po is required.
The installed brushless ESC had the ubiq- uitous red JST battery connector. I replaced this with a beast-female-28-3 to make it compatible with the 2-cell batteries used by E-flite ultra micro models. If extracting the buried ESC and solder-
ing leads to it isn’t appealing, just get the beast-F-to-JST-M adapter. These connec- tors are available from http://rc-connec-
tors.com/ and allow one to use the balancing charging system I have for them. This 20-inch model weighs in at 80 grams
with ballast, resulting in a wing loading of 6.8 ounces/square foot, which puts it out of the indoor range for me. I found it a bit tail heavy and needed to add a couple of grams of ballast to the nose to bring the c.g. to with- in spec. Outside it’s a sprightly performer. Half throttle is more than enough for take- off. The ailerons have individual servos; a “Y”-harness is built in. The ailerons are quite responsive and the Telemicro could be used as an aileron trainer, which is why I bought it. It is not however, as easy to fly as the larg- er Telemasters—just too twichy in this size.
PHOTOGRAPHY: STEW MEYERS
Full scale Carbon Cubat the 2012 Horn Point Fly In. Stew talks about Horizon Hobby’s new Carbon Cub micro model in this month’s column.
The same radio system and brushless mo-
tor in a larger model—say 30-inch—would have resulted in an easier to fly model due to dynamic scaling and a lighter wing load- ing. This would still have more than ade- quate power for a trainer, but not the sus- tained vertical climb that HK’s Telemicro is capable of. The clear plastic wing leading edge extensions increase the area slightly but don’t appreciably affect the perfor- mance. They are supposed to let you land more slowly. Horizion
http://www.horizonhobby.com
keeps pumping out new models. Quite a few have featured the gyro augmented AS3X (Artificial Stability 3 aXis system). Their latest E-flite Carbon Cub SS is not just a fancy Super Cub with the model using some
carbon, which is what I initially thought. It’s a scale model of the full scale Carbon Cub SS. Cub Crafters took the basic Piper Super Cub and updated the 60-year-old design’s structure with modern materials like carbon fiber, saving 250 pounds of airframe weight to create the Carbon Cub SS. The 120 hp en- gine has been souped up to produce 180 hp for two minutes for takeoff. Maximum con- tinuous power Except Take Off (METO) re- mains at 120 hp. This results in spectacular STOL takeoffs in one and a half plane lengths. The E-flite Carbon Cub SS (EFLU1180) model is capable of replicating this performance. By the way there is no carbon in the E-flite model. This model has a 24-inch wing span and weighs 90 grams ready to fly, resulting in a 5.5
by stew meyers You can reach Stew Meyers at 8304 Whitman Drive, Bethesda, Maryland 20817, or via e-mail at
stew.meyers@
verizon.net
PHOTOS: COURTESY OF E-FLITE
Those struts on E-flite’s Carbon Cub (top) are functional not decoration. The Carbon Cubon its $20 floats (above). Top view (at right) of the control surfaces and plate (arrow) to attach the tow hook.
56 SEPTEMBER 2012
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