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TEST Northeast Sailplane Products Electric slow-flyer ARF by John Tracey he Virus 400A is the largest of "^" Northeast Sailplane Products' (NSP's) series of Virus park flyers. It's designed as a lightly loaded trainer, and it has a huge, flat-bottom wing with giant barn-door ailerons. A 57-inch wingspan adds to its stability. The unique style of its swept-up wingtips and teardrop-shape fuselage combines to create an attractive plane. The tail boom is formed of dual carbon-fiber tubes for strength and lightness. Virus 400A comes equipped with a Speed 480 motor and an MP Jet 3.5:1 reduction drive. It also comes with a propeller and landing gear with lightweight foam wheels. The plane is covered with iron-on Solarfilm. WING CONSTRUCTION Building the Virus 4OOA is pretty basic; the written instructions include diagrams to help you build the model. A few details are omitted from the instructions, but if you use your common sense, you'll have no problems building the plane. The first step is to join the wing halves. A small metal rod reinforces the joint between the halves. The rod slips into a 62 MODEL AIRPLANE NEWS small brass-tube sleeve in each wing half. After using 5-minute epoxy to join the wing, I wrapped the joint with clear tape for extra reinforcement. When finished, the wing is more than strong enough for any maneuver this plane will do. The "A" in Virus 400A stands for "ailerons," and NSP is not kidding. The huge barn-door ailerons account for 30 percent of the wing chord, and each is controlled by an individual servo. One of the advantages of this setup is that it allows the ailerons to be mixed with a computer radio and used as flaperons for very slow landings and short takeoffs. I recommend that you use servos with at least 14 ounces of torque; I used Cirrus CS-20BB Sub Micros. If you don't have a computer radio, you can use a Y-connector to connect the aileron servos to the
eceiver, but you won't be able to use the ailerons as flaperons. The ailerons are top-hinged with tape, and a large gap on the bottom of the ailerons ensures a lot of travel. I taped the ailerons into a neutral position so they would not move while I installed the hinge tape, and I used SR Batteries Gapless Hinge Tape instead of the recommended tape. When you use it, make sure every- •MODEL: Virus 400A ^H •DISTRIBUTOR: Northeast Sailplane ProdtiCT^ •fYPE: sport-flyer ARF •jVINGSPAN: 57 in. BfVING AREA: 627 sq. in. •WEIGHT: 28.2 oz. •WING LOADING: 6.5 oz./sq. ft. •pENGTH: 37.5 In. •MOTOR USED: Speed 480 geared 3.5:1 HI (included) •PROP USED: APC 10x7 slow flyer (included) •RADIO REQ'D: 4-channel (5-channel w/flap- •f eron mixing optional), 4 mlcroservos and • ESC (2 aileron, elevator and rudder) •RADIO USED: Futaba 6XAS w/4 Cirrus •t CS-20BB sub-microservos and GWS m GS-400 ESC •pATTERY USED: 10-cell, 600mAh Ni-Cd •FLIGHT DURATION: 6 to 7 min. •PRICE: $159.95 •FEATURES: all components are built and •covered in Solarfllm. The kit includes a carbon •fiber tall boom, a Multiplex Speed 480 motor, •an MP Jet gearbox, a propeller, music-wire •jandlng gear, lightweight foam wheels and all •necessary hardware. •COMMENTS: the Northeast Sailplane Products •|/lrus 400A Is a unique ARF model that's a lot •of fun to fly. Its wing design allows the model •to maneuver in small flying areas without tip- •jftalling. When the ailerons are used as •flaperons, the model can be flown extremely •slowly and, because its ailerons are so large, •slow-speed turning is instantaneous. •j» Good craftsmanship and easy assembly. •p* Unique wing design. •• Good flight capabilities. •MISSES •• None found. JUNE2DD2 63
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