PHOTOGRAPHY: FRANK FANELLI
After dry fitting the flap pin hinges (above left) for proper adjustment, a grease pencil marks the depth of insertion for gluing. This ply guide (above right) aligns the aileron while glue dries on the hinges. Note how the cambered leading edge of the aileron nests in the trailing edge of the wing. All the hatches (below left) were marked so that proper orientation would be maintained. Eight JR DS821 servos (below right) were used along with the Spektrum AR 9020X receiver. Flaps, elevators, and ailerons need two servos apiece.
AT A GLANCE Type:
Construction: Wing span: Wing area: Airfoil: Length: Weight:
Wing loading: Motor: Prop:
R/C scale
balsa, ply & fiberglass 106 inches 1630 sq. in.
semi-symmetrical 68 inches
16.5–18.5 pounds 23.5–26.2 oz./sq.ft. Zenoah G-26 Evolution 16–6
Radio: Spektrum DX-18/AR 9020X Rx Servos:
Manufacturer:
8 JR DS821 digital Hangar 9
Dist. by: Horizon Hobby 4105 Fieldstone Road, Champaign, IL 61822 217-352-1913
www.horizonhobby.com
One other tool, which I think is the most useful and important is 3M Blue Painter’s Tape. There are two kinds: the regular, which has a pretty aggressive adhesive, and the less aggressive trim tape. The latter is the best one for the Super Cub job. Its utility in so many ways is outstanding. Because of the scale setup of the flap pushrod, it will take a bit of tinkering until it’s set properly. Keep the servo arm off the servo while setting the distance and keep
adjusting until the flap setting with the ser- vo in place is in the up position. Some of that aforementioned blue tape holding the sur- face in neutral really helps.
One of the things that really helped in the assembly was the fact that all the holes for the horns in the control surfaces were pre- cisely drilled. Even if the UltraCote covered these holes, they were there with a little bit of searching. That’s pretty impressive and it sure saved a lot of time and aggravation.
The pushrod shown in an aileron servo bay is a cosmetic scale detail, and exits the top of the wing. The string pulls the aileron extension through the wing
FLYING MODELS
to the root. Servos fit the trays very nicely (above right) and the holes for the retention screws in the hatch and the tray were precisely drilled.
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