Twinny (oz5180)

About this Plan

Svenson Twinny. Radio control sport biplane model. Kit # 30465.

Quote: "Hi Steve, I received that plan about 25 years ago, when the stuff box of an unknown club member in our work shop was disbanded. After interrupting the hobby for many years, I started with the Twinny again. It's a very nice flying Biplane with gentle habits. The Twinny is electrified with an AXI 2820/10 which maybe is a little bit over the top, half-throttle is perfect for spacious biplane-cruising. Wing span is 100cm, formers are complete (except the template for the landing gear) ... Regards and thumbs up for that great archive."

Direct submission to Outerzone.

Update 02/05/2018: Added kit review from Radio Modeller, June 1992, thanks to RFJ.

Update 14/03/2020: Added kit review from July 1981 RCM, thanks to RFJ.

Update 18/7/2024: Added instructions (nl, fr, en, de), thanks to Joerg-Michel Nussbaum.

Quote: "Introduction: TWINNY is a sport-model which can be used as an acrobatic trainer. should be equipped with a four-channel radio and powered by a .15 cu in engine (abt 2.5 cc). Construction is simple for those modelers who have built one or two radio-controlled models before, and flying is quite easy. Needless to say, it is advisable to read all instructions thoroughly before starting actual construction of the model.

Building is carried out in the sequence of the numbers shown on the drawings. In order to avoid any confusion, transfer the appropriate numbers on the die-cut parts with a ball-pen before you lift there parts from the die-cut sheet. To help in separating the parts from the cie-cut Sheets, use a sharp modeling knife. Carefully trim any burrs from the die-cut parts before assembling.

Since the wings are being built directly onto the plans, it would be wise to protect the plans with a sheet of cellophane paper or with the back-up sheet from any iron-on covering film. This will prevent the glue from sticking to the plans.

May we advise you to use white glue, ie an aliphatic resin. Part of the airframe which are likely to be submitted to greater stresses, such as the firewall which supports the engine mount, landing-gear platform, cabane-struts, hinges ans so forth should be assembled with an epoxy glue. Where large glueing areas are concerned, one can use some contact-glue.

Building the upper wing: The top wing does not have any dihedral, it can therefore be built flat on the building board. Pin down on the plan the bottom trailing edge sheeting W1 (balsa 1.5 X 48 mm). In the same way, pin down the bottom leading edge sheeting W2. Glue and pin down the 4 mm square bottom Spar W3. Cut to length and pin down the bottom central sheeting W4 (balsa 1.5 X 65 mm). Cut to length and lay on the building board the W5 bottom capestrips (balsa 1.5 X 5 mm).

Glue into place the center-section webbings W6 (1 mm die-cut plywood). Glue into place the 12 W7 wing-ribs (balsa 1.5 mm die-cut). Glue into place the 3 W8 wing-ribs (die-cut 1.5 mm balsa). Glue into place top-spar W9 (balsa 4 mm square). Glue into place the 4 mm sq balsa leading edge spar W10 Glue into place and secure with pins the top trailing edge W11 (1.5 mm X 48 mm balsa).

Lift and glue the bottom leading edge sheeting W2 against all wing-ribs and the leading edge spar. Support the curved-up sheeting with small balsa wedges so as to maintain contact between the sheeting and the wing-ribs. Use cloth-pins to attach the bottom sheeting to the leading edge spar...."

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